Nofootnotes article date August 2010 Image Appalachian orogeny.jpg thumb 300px The Appalachian Orogeny, a result of three separate continental collisions. USGS The Alleghenianorogeny or Appalachian orogeny is one of the geology geological mountain forming events orogeny that formed the Appalachian Mountains and Allegheny Mountains . The term and spelling Alleghany Orogeny sic originally proposed by H.P. Woodward 1957, 1958 is preferred usage. Approximately 350 million to 300 million years ago, in the Carboniferous Geologic period period , when Gondwana specifically what became Africa and what became North America collided, forming Pangaea . This collision exerted massive stress on what is today the Eastern Seaboard of North America, resulting in a large scale uplift of the entire region. Closer to the boundary between the colliding plates, tectonic stresses contributed to the metamorphosizing of the rock i.e. the transformation of igneous rock igneous and sedimentary rock into metamorphic rock . These stresses concurrently caused faults mostly thrust fault s and some Strike slip fault Strike slip faults strike slip faults as well as folding. The immense region involved in the continental collision, the vast temporal length of the orogeny and the thickness of the pile of sediments and igneous rocks known to have been involved are evidence that at the peak of the mountain building ... . The Appalachian Orogeny is responsible for the creation of the mountains themselves and is not responsible ..., Pennsylvania . Evidence for the Appalachian orogeny stretches for many hundreds of miles on the surface ... it enters a region of confused topography associated with earlier orogeny orogenies , but clearly ... of the Alleghenian mountain system departed with Africa when Pangaea broke up and the Atlantic Ocean ... geologically uplifted in relatively recent times, and are today much more rugged than their Alleghenian ... Geology of Manassas National Battlefield Park Category Orogeny Category Carboniferous Category ... more details
World geologic provinces Orogeny refers to forces and events leading to a severe structural deformation ... orogeny comes from the Greek language Greek oros for mountain plus genesis for creation or origin ... 12 The Caledonian Orogeny a multiple plate collision author N. H. Woodcock, Robin A. Strachan ... Macmillan ref Orogeny usually produces long arcuate from arcuare , to bend like a bow structures ... to a continent during an orogenic event. The processes of orogeny can take tens of millions of years ... University Press edition 2nd ref Frequently, rock formation s that undergo orogeny are severely deformed and undergo metamorphism . During orogeny, deeply buried rocks may be pushed to the surface. Sea bottom and near shore material may cover some or all of the orogenic area. If the orogeny is due ... cycle Although orogeny involves plate tectonics , the tectonic forces result in a variety of associated ..., and how these properties change during orogenesis. In addition to orogeny, the orogen once formed ... words, orogeny is only a phase in the life of an orogen . Five characteristics of the orogenic ... orogeny Caledonian Orogeny refers to the Silurian and Devonian events that resulted from the collision ... name Strachan cite book title cited work chapter Chapter 12 The Caledonian Orogeny a multiple plate ... dTkKn8Ufzd4C&pg PA187 isbn 0632036567 year 2000 ref In summary, an orogeny is a long lived deformational episode in which many geological phenomena play a role. The orogeny of an orogen is only part ... UJeVXaMhxI8C&pg PA1 isbn 0792348796 publisher Springer year 1998 ref Biology The study of orogeny ... thrust fault ing of the Sevier Orogeny in Montana . Note the white Madison Limestone repeated, with one ... TGCATN 2.0.CO 2 ref Large modern orogenies often lie on the margins of continents the AlleghenianorogenyAlleghenian Appalachian , Laramide orogeny Laramide , and Andean orogeny Andean orogenies are examples of these in the Americas. Older inactive orogenies, such as the Algoman Orogeny Algoman , Penokean ... more details
Image Hercynides EN.svg thumb 300px Location of the Hercynian AlleghenianorogenyAlleghenian mountain belts in the middle of the Carboniferous period. Present day coastlines are indicated in grey for reference. ref Based on Matte 2001 and Ziegler 1990 ref The Variscan or Hercynian orogeny is a geologic mountain building event caused by Late Paleozoic continental collision between Euramerica Laurussia and Gondwana to form the supercontinent of Pangaea . Naming The name, Variscan , comes from the Medieval Latin name for the district Variscia , the home of a Germanic tribe, the Varisci , and was coined .... Accessed on December 29, 2007. ref The Variscan was contemporaneous with the Acadian orogeny Acadian and Alleghenianorogeny in the United States , forming the Ouachita Mountains Ouachita and Appalachian ... for variscan orogeny , ca. 15.000 hercynian orogeny . In German 1.170 for variszische Orogenese , 154 ... Orogeny . Historical Geology, University of North Texas. Accessed on December 29, 2007. ref The regional ... 1, p. 3. ref deviating from the meaning as a term for the North American and European orogeny related ... thumb Distribution of orogenies with similar ages to the Variscan orogeny shaded The North American ... orogeny . In the Alps a Variscan core is built by Mercantour , Pelvoux , Belledonne , Montblanc ... orogeny before the opening of the Atlantic Ocean in Jurassic times. Variscan mountains in a broader ..., 2007. ref Formation The Variscan orogeny involved a complicated heterogeneous assembly of different ... difficult. Plate convergence that caused the Caledonian orogeny in the Silurian continued to form the Variscan orogeny in the succeeding Devonian and Carboniferous Periods. Both orogenies resulted ... Ocean between them. They collided in the Caledonian orogeny and formed the Caledonide mountains ... orogeny acadian phase of the Caledonian orogeny. Contemporaneously the Tornquist Sea between ... reflist Further reading Cite journal last Matte first P. year 2001 title The Variscan collage and orogeny ... more details
unreferenced date March 2008 Image 100 global.gif thumb right Cimmeria collided with North and South China blocks, closing the Paleo Tethys Ocean between them and forming mountains. 100 mya map The Cimmerian Orogeny , is an orogeny that created mountain ranges that now lie in Central Asia. The orogeny is believed to have begun 200 150 million years ago much of the Jurassic Period , when the Cimmeria continent Cimmerian plate collided with the southern coast of Kazakhstania and North China continent North and South China continent South China , closing the ancient Paleo Tethys Ocean between them. The plate consisted of what are now known as Turkey , Iran , Tibet and western Southeast Asia . Much of the plate s northern boundary formed mountain ranges that were as high as the present day Himalayas. The orogeny continued well into the Cretaceous and Early Cenozoic . See also Hercynian orogeny an orogeny that preceded the Cimmerian orogeny Alpine orogeny an orogeny that succeeded the Cimmerian orogeny Category Orogeny Category Triassic Category Jurassic Category Geology of Asia Category Geology of Central Asia tectonics stub cs Kimmersk vr sn n pl Orogeneza kimeryjska vi Ki n t o s n Cimmeria ... more details
Rodinia or during the Ancestral Rocky Mountains orogeny. ref name Ithought cite web url http geology.utah.gov utahgeo geo thrustfault5.htm title I thought that was the Laramide orogeny work ... was overcome by western extension of the North American Plate to start the Basin and Range Orogeny. Citation ... refend Category Orogeny Category Geology of the United States Category Cretaceous Category Paleocene ... more details
Image North america basement rocks.png thumb 300 px Innuitian orogeny red surrounded by the Slave craton Slave and Rae craton Rae craton s pink that constitute the northern core of the North American craton Laurentia . The Innuitian orogeny , sometimes called the Ellesmere orogeny , was a major tectonics tectonic orogeny mountain building episode responsible for the formation of a series of mountain range s in the Canadian Arctic . The episode started with the earliest Paleozoic rift ing, extending from Ellesmere Island to Melville Island Canada Melville Island . ref http atlas.nrcan.gc.ca site english maps environment geology geologicalprovinces 1 The Atlas of Canada Geological Provinces ref See also Innuitian Mountains References reflist External links http www.thecanadianencyclopedia.com index.cfm?PgNm TCE&Params A1SEC821211 Geological Regions Innuitian orogen Category Orogenies Category Geology of Nunavut tectonics stub ... more details
Malagasy Orogeny is the name given to the Ediacaran to Cambrian orogeny that resulted as India collided with the already amalgamated Africa n continent that consisted of Azania and the Congo Tanzania Bangweulu Block. ref Collins and Pisarevsky 2005 Amalgamating eastern Gondwana The evolution of the Circum Indian Orogens. Earth Science Reviews, 71, 229 270 ref The orogeny affects the parts of the East African Orogeny East African Orogen ref Stern, R. J. 1994 Neoproterozoic 900 550 Ma Arc Assembly and continental collision in the East African Orogen. Annual Review of Earth and Planetary Sciences, 22, 319 351 ref that are now found in southern India, Madagascar and central Arabian Peninsula Arabia . References See Wikipedia Footnotes on how to create references using ref ref tags which will then appear here automatically Reflist Categories Category Orogenies geology stub ... more details
The Sonoma Orogeny Silberling and Roberts, 1962 has been defined as a Late Permian to Early Triassic Orogeny tectonic event that deformed Upper Paleozoic oceanic facies rocks and emplaced them over the Upper Paleozoic margin of the southwestern United States. Like the earlier Antler orogeny , the Sonoma event was caused by the collision of an eastward moving Island arc with the North American continental margin. Oceanic rocks and parts of the arc were forced, or sutured onto Laurentia modern day North America becoming part of the continent. The Sonoma orogeny is one of the two Permian Late Triassic disturbances of the Cordilleran Western North America region, along with the Cassiar orogeny in what is now British Columbia. References Levin, Harold, The Earth through Time , Wiley, 8th. Edition, 2005, ISBN 978 0471697435 Silberling, N. J. and R. J. Roberts. 1962. Pre Tertiary stratigraphy and structure of northwestern Nevada. GSA Special Paper 72 tectonics stub Category Orogenies ... more details
Bay , and on the Dorset coast near Lulworth Cove . The Alpine orogeny occurred when the continents ... ranges. The Alpine orogeny is considered one of the three major phases of orogeny in Europe that define the geology of that continent, along with the Caledonian orogeny that formed the Old Red Sandstone ... Paleozoic , and the Variscan orogeny Hercynian or Variscan orogeny that formed Pangaea when Gondwana ... more details
Image Appalachian orogeny.jpg thumb 300px The Appalachian Orogeny, a result of three separate continental collisions. USGS The Acadian orogeny is a middle Paleozoic mountain building event orogeny , especially in the northern Appalachians , between New York and Newfoundland island Newfoundland . The Acadian orogeny most greatly affected the Northern Appalachian region New England northeastward into the Gasp region of Canada . The Acadian orogeny should not be regarded as a single tectonic event, but rather as an orogenic era. It spanned a period of about 50 million years, from 375 to 325 million years ago. In Gasp and adjacent areas, its climax is dated as early in the Late Devonian , but deformational, Igneous rocks plutonic , and Metamorphism metamorphic events extended into Early Mississippian time. During the course of the orogeny, older rocks were deformed and metamorphosed, and new faults formed and older faults were reactivated. ref name usgs USGS url http 3dparks.wr.usgs.gov nyc valleyandridge valleyandridge.htm article Valley and Ridge Province accessdate 2009 01 08 ref It was roughly contemporaneous with the Bretonic phase of the Variscan orogeny of Europe , with metamorphic events in southwestern Texas and northern Mexico , and with the Antler orogeny of the Great Basin . Geodynamics The cause of this great period of deformation is a result of the plate docking of a small continental landmass called Avalonia named after the Avalon Peninsula of Newfoundland . The docking of Avalonia onto the composite margin of Ganderia and Laurentia resulted in the closing of a portion ... thinning that followed the Acadian orogeny created volcano es, such as the large Mount Pleasant Caldera in southwestern New Brunswick , Canada . See also Orogeny mountain building Iapetus Ocean Taconic orogeny Central Pangean Mountains References Wikisource1911Enc Acadian reflist refbegin Dictionary .... Petroleum Geologists , p. 114 refend Category Orogeny Category Devonian Category Carboniferous Category ... more details
The Laramide orogeny was a period of mountain building in western North America , which started in the Late Cretaceous , 70 to 80 million years ago, and ended 35 to 55 million years ago. The exact duration and ages of beginning and end of the orogeny are in dispute, as is the cause. The Laramide orogeny occurred in a series of pulses, with quiescent phases intervening. The major feature that was created by this orogeny was deep seated, thick skinned deformation , with evidence of this orogeny found from Canada to northern Mexico , with the easternmost extent of the mountain building represented by the Black Hills of South Dakota . The phenomenon is named for the Laramie Mountains of eastern Wyoming . The Laramide orogeny is sometimes confused with the Sevier orogeny , which partially overlapped ... title I thought that was the Laramide orogeny work Utah s Sevier Thrust System publisher Utah ... thumb right 336px The Laramide orogeny was caused by subduction of a plate at a shallow angle. The orogeny is commonly attributed to events off the west coast of North America, where the Kula Plate ... The Laramide orogeny produced intermontane structural basin s and adjacent Horst geology mountain ... sedimentary rock s that predate the Laramide orogeny. As much as 5000 m of Cretaceous and Tertiary ... record continuing orogenic activity. ref name nasa During the Laramide orogeny, basin floors and mountain ... Orogeny In the United States, these distinctive intermontane basins occur principally in the central ... Sevier orogeny The still earlier Nevadan orogeny of the Jurassic late Jurassic &mdash Cretaceous early ... subduction in the Laramide orogeny journal Nature Geoscience volume 3 pages 353 357 doi 10.1038 ngeo829 ... M. last1 English first2 Stephen T. last2 Johnston title The Laramide Orogeny What Were the Driving ... information UCLA http tlacaelel.igeofcu.unam.mx GeoD colision figs orogeny laramide.html Laramide orogeny Category Orogeny Category Cretaceous Category Paleocene Category Eocene Category Geology ... more details
Expert subject Geology date February 2009 seems Public Domain The Colorado orogeny , or Colorado orogen , was an orogeny in Colorado and surrounding areas which was a part of the development of the ancestral Rockies . The Colorado orogeny, formerly called the Colorado province geology province , is a 500 km wide belt of ocean oceanic volcanic arc arc rock 1.78 1.65 Ga that extends southward into New Mexico and composes a major part of the Proterozoic provinces of southwestern United States . This transcontinental collisional event occurred during the Paleoproterozoic Stratherian period . ref name USGS http pubs.usgs.gov of 2001 ofr 01 0364 colo of text.html Co orogeny USGS Open File Report 01 0364 Preliminary Precambrian Basement Map of Colorado ref The Wyoming sector of the Colorado orogeny was formerly called the Medicine Bow orogeny . The eastern sector extends into the High Plains and is called the Central Plains orogeny. The boundary between the Colorado orogeny and the Wyoming craton is the Cheyenne belt , a 5 km wide mylonitic shear zone that verges northward. The Cheyenne belt transects and cuts off the south edge of the older Trans Hudson orogeny . ref name Sims cite paper author Sims, P.K., C.A. Finn, and V.L. Rystrom title Preliminary Precambrian Basement Map Showing Geologic Geophysical Domains, Wyoming publisher USGS Open File Report 01 199 date 2001 url http pubs.usgs.gov of 2001 ofr 01 0199 accessdate 2008 02 22 ref The Paleoproterozoic Volcanic rock volcanic and sedimentary rocks that resulted from the Colorado orogeny underwent metamorphism followed by plastic Fold geology folding under moderate P T conditions. The metamorphism was accompanied by intrusion ... took place at moderate depths. ref name USGS The Colorado orogeny exhibits differing structural ... from those in the northernmost part of the Colorado orogeny. In the north central Front Range .... ref name USGS References reflist Category Orogeny Category Proterozoic Category Geography of Colorado ... more details
The Antler orogeny is a mountain building episode that is named for Antler Peak, at Battle Mountain, Nevada . The orogeny extensively deformed Paleozoic rocks of the Great Basin in Nevada and western Utah during Late Devonian and Early Mississippian time. In the late Devonian, the Antler volcanic island arc terrane collided with what was then the west coast of North America in the vicinity of today s border between Utah and Nevada. The collision zone is today signified by the geological alignment called the Carlin Unconformity or Carlin Trend , an area enriched in various ores including gold. It is also represented by the Roberts Mountains Thrust . It is broadly contemporary with the Acadian orogeny of eastern North America. The Antler orogeny was first defined by the American geologist Ralph J. Roberts geologist Ralph J. Roberts . ref Roberts, R.J. 1949. Geology of the Antler Peak quadrangle, Nevada. US Geological Survey Open File Report. 108 p. ref ref Roberts, R.J. 1951. Geology of the Antler Peak quadrangle, Nevada. USGS Geologic Quadrangle Map GQ 10 ref It was, however, originally described in terms of the old geology of geosyncline s, before the acceptance of what is now known as plate tectonics including the concept of terrane s. References references http jan.ucc.nau.edu rcb7 Text WUS.html Geologic history of Western US with maps http www.geology.ewu.edu mccollum ANTLEROROGENICREGION.htm Linda B. McCollum and Michael B. McCollum, Research within the Antler and Sonoma Orogens, Northwestern Nevada, 1983 1993 Dictionary of Geological Terms , 3rd. Edition,1984, Robert L. Bates and Julia A. Jackson, Eds., prepared by The American Geological Institute Category Orogeny Category Geology of Nevada Category Geology of Utah Category Devonian Category Carboniferous tectonics stub ... more details
The Nevadan Orogeny was a major mountain building event that took place along the western edge of ancient North America between the Mid to Late Jurassic between about 180 and 140 million years ago . ref cite web url http www.gorp.com parks guide travel ta yosemite hiking california sidwcmdev 056847.html last Shaffer first Jeffrey P. title Evolution of the Yosemite Landscape The Nevadan Orogeny work One Hundred Hikes in Yosemite ref The Nevadan orogeny was the first of three major mountain building episodes to transform Western North America between the Late Mesozoic and Early Cenozoic Eras, the latter two being the Sevier orogeny Sevier and Laramide orogeny , chronologically. Much like the two orogenies that followed, the Nevadan was caused by the subduction of Oceanic crust oceanic lithosphere at a subduction zone running along the edge of the North American continent. This resulted in relatively cool oceanic crust descending into the lithosphere very quickly, and steeply beneath the edge of the continent . Due to dehydration and release of volatiles from the subducted plate, the mantle above the down going plate was melted. This magma rose through the mantle wedge and the continental crust to produce an arc of extrusive volcanoes with large intrusive batholith s beneath. These intrusive batholiths are presently exposed as the Sierra Nevada batholith s. Due to the steep angle of the subducted plate, these were located relatively close to continent s edge. See also Sierran Arc References Refimprove date June 2010 reflist Category Orogenies Category Jurassic Category Natural history of North America Category Geology of the United States Category Geology of California Category Sierra Nevada U.S. tectonics stub pt Orogenia do Nevada ... more details
The Kaikoura Orogeny is a New Zealand orogeny that has given birth to the Southern Alps . It began 25 million years ago along the Alpine Fault . In this orogeny the Southern alps are being formed because the Pacific Plate is being pushed up over the Australian Plate . As the Pacific Plate rises over the Australian Plate it gains altitude, having the effect of giving birth to the Southern Alps. Uplift From 25 to 15 million years ago most of New Zealand was still covered by ocean. Almost all the land that broke the surface of the sea was Torlesse Greywacke . Then the plates started to collide, the crust of New Zealand came under pressure and the Alpine Fault was formed. Then from 15 million to 5 million years ago the Pacific Plate was rammed up over the Australian Plate along the newly created Alpine Fault. The pressure applied from 25 to 15 million years ago had simply been too much and the crust thickened. This gave birth to the first of the Southern Alps. Also during this period of time, chlorite grade schist was brought to the surface. From 5 million years ago to the present day the rate of uplift has accelerated. Oligoclase and biotite schist have also been pushed to the surface of the Earth. In total about 20 kilometres of uplift has taken place during the Kaikoura Orogeny but most of this has been eroded away. References The Rise and Fall of the Southern Alps, G. Coates published 2002 Category Orogeny Category Cenozoic Category Geology of New Zealand tectonics stub NewZealand stub regional geology stub ... more details
The Rangitata Orogeny an orogeny named after the Rangitata River , was a long period of uplift and collision in New Zealand . 200 million years ago, sedimentary strata was being pushed along the sea floor as the result of seafloor spreading . The moving rocks were being pushed towards a gap in the crust or subduction zone. However, when the rocks reached this zone, the wet sediments were too buoyant to follow the heavier ones through the subduction zone. Instead of this the strata was scraped off the crust and squeezed against sediments in the volcanic sea to the west. This collision lasted for 50 million years. However, the wet sediments could not just keep piling up. After 50 million years, there was simply to much rock and a log jam in the process was formed. The rocks were squeezed together as they broke and crumpled up. As the compression intensified, the strata was slowly pushed up, creating new land. The collision was also causing a great thickening of the crust, pushing the rocks down into the top of the mantle. The high pressures and temperatures of this occurrence metamorphosed the lower rocks into the Haast Schist Haast Schists . References The Rise and Fall of the Southern Alps, G. Coates Published 2002 Category Orogeny Category Cretaceous Category Geology of New Zealand tectonics stub NewZealand stub Regional geology stub ... more details
Citations missing date February 2007 The Cadomian Orogeny was a plate tectonics tectonic event or series of events in the late Neoproterozoic , about 650 550 Annum Ma , which probably included the formation of mountains. This occurred on the margin of the Gondwana continent, involving one or more collisions of island arc s and accretion of other material at a subduction zone . The precise events, and geographical position, are uncertain, but are thought to involve the terrane s of Avalonia , Armorican terrane Armorica and Iberia. Rocks deformed in the orogeny are found in several areas of Europe , including northern France , the English Midlands , southern Germany , Bohemia , southern Poland and the southwest Iberian Peninsula . The name comes from Cadomus , the Latin name for Caen , northern France. L Bertrand gave the orogeny its name in 1921, naming it after Cadomus the Gaulish name for Caen ... isotope ratios and concluded that the basement is not widely present below the Cadmonian orogeny ... do not predate the Cadomian orogeny, and this name is no longer appropriate for the Icart Gneiss. ref ... orogeny in the North Armorican Massif a brief review Geological Society, London, Special Publications ... structures of the Cadomian Orogeny. These are East west to North East tending upright folding. Schist ... Cast . The movement on the belts was sinistral and horizontal. During the orogeny the migmatite ... with the typical structure. Post orogeny After the orogeny, continental sediments were washed on top ..., Jersey and Alderney. The Cap Frehel red bed s are dated at Ma 472 . These post orogeny deposits ... grain in the Cadomian Orogeny. Models There are two overall models for the formation of the Cadomian Orogeny. Firstly by P. Bale & J. P. Brun that compression to the south west of a volcanic arc and back ... the orogeny. Crustal thickening took place. Secondly P. J. Treloar considers that the North Armorican ... belt references Category Geology of Europe Category Orogeny cs Kadomsk vr sn n de Cadomische ... more details
Image Caledonides EN.svg thumb 350px Location of the different branches of the Caledonian Acadian orogeny Acadian belts at the end of the Caledonian orogeny Early Devonian . Present day coastlines are indicated in gray for reference. Later in geological history , the Atlantic Ocean opened and the different parts of the orogenic belt moved apart. ref Reconstruction based on Matte 2001 Stampfli et al. 2002 Torsvik et al. 1996 and Ziegler 1990 ref The Caledonian orogeny is a mountain building era orogeny ... Greenland Orogen eastern Greenland and parts of north central Europe. The Caledonian orogeny encompasses ... s of Laurentia , Baltica and Avalonia collided. The Caledonian orogeny has been named for Caledonia ... . Geologists like mile Haug and Hans Stille saw the Caledonian orogeny as one of several episodic ... McKerrow et al. 2002 ref Current understanding has it that the Caledonian orogeny encompasses a number ... and Avalonia have joined during the Caledonian orogeny to form Euramerica . ref Reconstruction Ron Blakey ref The Caledonian orogeny was one of several orogenies that would eventually form the supercontinent ... phase that is often included in the Caledonian orogeny is the Finnmarkian phase at 505 million ... the Taconic orogeny between 480 to 435 million years ago . During the Ordovician, the small continent ... orogeny from about 425 to 395 million years ago is called the Scandian phase in Scandinavia and the Grampian .... 1996 ref In North America , the collision between Avalonia and Laurentia is called the Acadian orogeny ... margin of Laurussia in the Carboniferous Hercynian orogeny about 340 million years ago . The Rhenohercynian ... the Caledonian orogeny. According to these authors, a small rim from Euramerica rifted off when this basin ... during the Hercynian orogeny. ref See the reconstructions in Cocks & Torsvik 2006 for this view ... and orogeny 480 290 Ma and the tectonic definition of the Armorica microplate a review , Terra Nova ... Orogeny redefined , Journal of the Geological Society 157, pp. 1149 1154. aut Sch tz, M. Reischmann ... more details
Image Taconic orogeny.png right thumb 300px Illustration of the Taconic orogeny The Taconic orogeny was a great mountain building period that perhaps had the greatest overall effect on the geologic structure of basement rocks within the New York Bight region. The effects of this orogeny are most apparent throughout New England , but the sediments derived from mountainous areas formed in the northeast can be traced throughout the Appalachians and midcontinental North America. ref name valley USGS url http 3dparks.wr.usgs.gov nyc valleyandridge valleyandridge.htm article Valley and Ridge Province ref Beginning in Cambrian time, about 550 million years ago, the Iapetus Ocean began to grow progressively narrower. The weight of accumulating sediments, in addition to compressional forces in the crust, forced the eastern edge of the North American continent to fold gradually downward. In this manner, shallow water carbonate deposition that had persisted on the continental shelf margin through Late Cambrian into Early Ordovician time, gave way to fine grained clastic deposition and deeper water conditions during the Middle Ordovician. In this period a Convergent boundary convergent plate boundary developed along the eastern edge of a small island chain. Crustal material beneath the Iapetus Ocean sank into the mantle along a subduction zone with an eastward dipping orientation. Partial melting of the down going plate produced magma that returned to the surface to form the offshore Taconic ... mountain building period referred to as the Taconic Orogeny. ref name valley Cameron s Line is the suture ... 2010 ref When the Taconic Orogeny subsided in the New York Bight region during Late Ordovician time ... time about 360 million years ago when the next period of mountain building began, the Acadian orogeny . ref name valley Aftermath of the Taconic Orogeny As the Taconic Orogeny subsided in early Silurian ... Emmons , the geologist who first described the Taconic system References reflist Category Orogeny Category ... more details
The Petermann Orogeny was an intra continent al event that affected basement rocks of the northern Musgrave Province and Proterozoic sediment s of the now southern Amadeus Basin between 550 535 Year SI prefix multipliers Ma . Prior to the Petermann Orogeny, which resulted in exhumation of the Musgrave Block , the Amadeus Basin was contiguous with the Officer Basin in South Australia . The extent and effect of the Petermann Orogen appears to be relatively confined, occurring most pervasively within the central northern Musgrave Block. Here, older Musgravian 1200 1150 Ma Fabric geology fabric s are partially to completely overprinted by sub eclogite facies mineral assemblages 11 12 kbar at 650 C . The Woodroofe Thrust , Davenport Shear Zone and Mann Fault accommodated much of the 30 40 km exhumation. Exhumation of the Musgrave Block and overlying sediments resulted in successive unroofing and Deposition ... Orogeny is responsible for the deposition of the Georgina Basin , Officer Basin, Ngalia Basin and Amadeus ... the Levenger and Moorilyanna Grabens. Dynamics The Petermann Orogeny is dominated by south over ... discontinuities including the Mundrabilla lineament divide the Petermann orogeny, with extensive ... Orogeny are typically steeply to gently south dipping and subparallel to the thrust faults upon ... ductile and ductile deformation. Tectonics The tectonics of the Petermann Orogeny are extremely ... states that the degree of extreme Tectonic uplift uplift experienced in the Petermann Orogeny ... the same. The Petermann Orogeny was unusually violent, and has resulted in a rare window into the lower crust. Economic Geology The Petermann Orogeny exposes deep crustal roots of the previous Musgrave ... feedback, intraplate orogeny and the geochemical structure of the crust a central Australia n perspective ... 01a GeolSocLond 01a.html Tectonic feedback, intraplate orogeny and the geochemical structure of the crust a central Australian perspective Category Orogeny Category Geology of Western Australia ... more details
The Grenville Orogeny was a long lived Mesoproterozoic mountain building event associated with the assembly of the supercontinent Rodinia . Its record is a prominent orogenic belt which spans a significant portion of the North American continent, from Labrador to Mexico , as well as to Scotland . Orogeny ... as the Kibaran orogeny in Africa, the Dalslandian orogeny in western Europe. File Grenville Extent.png thumb alt Extent of the Grenville orogeny Extent orange regions of the Grenville orogeny, after Tollo et al 2004 and Darabi 2004 . Timescale The problem of timing of the Grenville Orogeny is an area ..., and represents one of the most detailed records of the orogeny. This classification considers the classical ... orogenies compose the Grenville Cycle, and the Elzevirian Orogeny stands on its own. Due to the great ... here. File Grenville Timeline.png thumb alt Timeline of the Grenville orogeny Timeline of the Grenville orogeny, after Rivers 2002 General Tectonics Reconstruction of the events of the orogeny is ongoing ... were accreted during orogeny. ref name corriveau Cite journal last Corriveau first Louise year 1990 ... for the Grenville orogeny. ref name corrigan Regional Variations It is important to separate local from large scale tectonic history of the orogenic belt in order to understand the orogeny. For this purpose ... Orogeny journal Geology Magazine volume 141 pages 15 39 ref Texas and Mexico Texas and Mexico represent ... in the eastern collision. ref name four The Zapotecan Orogeny of Mexico is coeval with the later stages of the Grenville orogeny, and they are generally considered to be one and the same. ref name ... igneous protoliths metamorphosed to granulite facies during the orogeny fall into two age ... regional metamorphic overprinting since the orogeny, it is considered an ideal study area for Grenville and pre Grenville age tectonics. Hence, most of what is known about the orogeny and its processes ... Orogeny Category Proterozoic cs Grenvillsk vr sn n nl Grenville orogenese uk ... more details
The Uralian orogeny refers to the long series of mountain building events that raised the Ural Mountains , starting in the Late Carboniferous and Permian periods of the Palaeozoic Era, ca. 318 299 and 299 251 Mya, and ending with the last series of continental collisions in Triassic to early Jurassic times. In terms of plate tectonics and continental drift , the Uralian orogeny resulted from a southwestern movement of the Siberia continent Siberian plate , catching a smaller landmass, Kazakhstania , between it and the nearly completely assembled supercontinent, Pangaea . The mountains of Eastern Europe , on the paleocontinent geologists call Laurussia , and those of Western Siberia both rose as the edge of Kazakhstania dove under the European plate. This event was the last stage in the assembly of Pangaea . The region affected by the orogeny, the Uralian orogenic belt, is usually thought of as the boundary between Europe and Asia . It extends from the Aral Sea to Novaya Zemlya , and it includes in addition to the Ural Mountains, the Pay Khoy Ridge and the Mugodzhar Hills of northwest Kazakhstan . Its total length is about convert 3500 km mi , of which the Ural Mountains are about convert 2500 km mi abbr on . ref http www.geo.arizona.edu geo5xx geo527 Urals geography.html J. Zavacky, The Urals, a Late Paleozoic Mountain Belt ref References Reflist External links http www.scotese.com newpage5.htm Late Permian map Category Orogenies Category Carboniferous Category Permian Category Natural history of Europe tectonics stub it Uraliano nl Oeral orogenese vi Ki n t o s n Ural ... more details
I am working on this article on my user page. It ll be at least a couple of weeks. More like four to six weeks. When I m done, I think I ll copy and paste my article into this and then delete what s here. I have copy and pasted this information onto my user page, so may use some of it. The Penokean orogeny was a mountain building episode that occurred in the early Proterozoic about 1.85 to 1.84 billion years ago, in the area of North America that would eventually become Minnesota , Wisconsin , Michigan and Ontario . It was a major event in the formation of the North American continent , and happened during a worldwide period of mountain building and continent formation. Before this episode the area was a passive continental margin occupied by a shallow sea, which created large sedimentary deposits including the banded iron formation s of the Iron Range s. The orogeny happened in two phases. First an island arc called the Pembine Wausau terrane collided with the ancient North American craton along with volcanoes formed in its back arc basin . The second phase involved a microcontinent called the Marshfield terrane, which today forms parts of Wisconsin and Illinois. The episode lasted about 10 million years. Hundreds of millions of years later, the Midcontinent Rift System Keweenawan Rift occurred in the same area creating the basin that would eventually become Lake Superior . The remains of this orogeny can be seen today as the Iron Ranges of Minnesota and Ontario, the Northern Highland s of Wisconsin and the Upper Peninsula of Michigan . See also Plate Tectonics External links http www.winona.edu geology MRW EarlyProterozoic.htm www.winona.edu geology MRW EarlyProterozoic.htm http www.geo.umn.edu people grads davi0919 srthesis penokean.html www.geo.umn.edu people grads davi0919 srthesis penokean.html Category Orogenies Category Proterozoic Category Geology of Wisconsin Category Geology of Minnesota Category Geology of Michigan Category Geology of Ontario tectonics s ... more details
File Ouachitas color hillshade only.jpg thumb right The Ouachita Mountains lie south of the Arkansas River valley which separates them from the The Ozarks Ozark plateau . The Ouachita orogeny was a orogeny mountain building event that resulted in the Fold geology folding and Fault geology faulting of stratum strata currently exposed in the Ouachita Mountains . The more extensive Ouachita system extends from the current range in Arkansas and Oklahoma southeast to the Black Warrior Basin in Alabama and to the southwest through the Llano Uplift Llano , Marathon Uplift Marathon , and Solitario uplifts in Texas on into Coahuila and Chihuahua state Chihuahua in Mexico . ref name Calvert http www.du.edu jcalvert geol ouach.htm The Ouachita System ref The region during the early Paleozoic lay off the coast of the southern portion of Laurentia , in what is now Southern United States. Laurentia straddled on the equator at the time and the Rheic Ocean was to the south of Laurentia. Through the Ordovician , Silurian , Devonian , and early Carboniferous , marine sedimentation left extensive deposits of black shale , quartzose sandstone , and chert beds. During the Mississippian a flysch sequence, with dark shales and graywacke s was deposited. Lenses of silicic tuff exist as evidence of limited volcanism . ref name Calvert These later sediments were formed over a subduction zone which formed along southern Laurentia as South America collided with Laurentia as it moved northward. The collision compressed and uplifted the region to form the Ouachita Mountains. The Ouachita Mountains during Permian to the Jurassic were extensively eroded. Much of the Ouachita system was buried beneath Mesozoic and Cenozoic sediments to the southeast and southwest. The structures there have only been revealed through deep drilling in petroleum exploration. References references External links http rockhoundingar.com geology ouamtns.html The Formation of the Ouachita Mountains Category Ouachita Mount ... more details
and pressure to Metamorphism metamorphize then existing rock. This orogeny added landmass along a convert ... into the Lake Huron area. The Algoman orogeny brought the Archaen Eon to a close, about mya 2500 ... of the earth s crust. Prior to the orogeny thousands of feet of sedimentary layers had been laid ... ago was the mountain building episode known as the Algoman orogeny ref name nature cite web title Voyageurs ... as the Kenoran orogeny in Canada. ref name ojakangas rp 32 This volcanism, intrusion, metamorphism .... ref name ojakangas rp 32 The Algoman orogeny extended in a line roughly 1,200 kilometers long from ... ago at the end of the Algoman orogeny. This uplift of the Earth s surface affected Precambrian rocks ... name stearn rp 158 It is the earliest datable orogeny in North America, ref name feat cite web url ... ago. ref name davis cite thesis title The Big Picture, Early Penokean Orogeny From Rifting to Iron ... with the orogeny. ref name keck cite report title U PB Detrital Zircon Provenance od the Proterozoic ... of mountains by the Algoman orogeny. ref name schwartz Most Archean volcanic rocks are concentrated ... is around mya 2500 million years ago , the time of the Kenoran orogeny. ref name crustal rp 37 Rocks ... Geological history of Earth Category Orogeny Category Terranes ... more details
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