Image Zermatt and Matterhorn.jpg thumb The Matterhorn , a classic peak A pyramidalpeak , or sometimes in its most extreme form called a glacial horn , is a mountain top that has been modified by the action of ice during glaciation and frost weathering . If the use is unambiguous within a mountain context, then the simple terms peak or horn may be used. Formation Ice fields at the head of glacier s develop bowl shaped depression geology basins in the sides of a mountain called cirque s sometimes called corries or cwms . Cirque glaciers have specific characteristics. They have rotational sliding that abrades the floor of the basin but not the edge and that causes the bowl shape to form and also contributes to the development of the glacial moraine morainal or rock thresholds that separate them from downvalley slopes as well as hold in glacial lake s called tarns. As cirques are formed by glaciation in an alpine environment, the headwall and ridges known as ar te s become more steep and defined. This occurs due to Weathering Frost weathering freeze thaw and mass wasting beneath the ice surface. It is widely held that a common cause for headwall steepening and extension headward is the crevasse s known as bergschrund that occur between the moving ice and the headwall. This is a location where plucking and shattering has been seen by observers that explore the crevasses. A completed cirque is exposed as the glacier that was in the cirque melts away, after the periods of glaciation in the Pleistocene . When there are three or more of these cirque headwalls and ar tes joined together to form a single peak it creates a pyramid shape with very steep walls and it is called a horn or glacial ... of the peak, but the most common number of faces for a horn to have is three or four. A glacial horn ... arete.html The Geography Site Aretes and Pyramidal Peaks http pubs.usgs.gov of 2004 1216 text.html Glossary ... Glacial landforms topography stub Glaciers cs Horsk t t de Karling fr Pic pyramidal it Picco ... more details
Infobox neuron neuron name Pyramidal cell image neuron GolgiStainedPyramidalCell.jpg caption neuron A human neocortical pyramidal neuron stained via Golgi s method Golgi technique . Notice the apical dendrite ... projection neuron neurotransmitter Glutamate , GABA morphology Multipolar Pyramidal GraySubject 183 GrayPage 722 NeuroLex Pyramidal Cell NeuroLexID sao862606388 Pyramidal neurons pyramidal cells are a type ... . Pyramidal neurons are the primary excitation units of the mammalian prefrontal cortex and the corticospinal tract . Pyramidal neurons were first discovered and studied by Santiago Ram n ... into the pyramidal neuron and prefrontal function journal Cereb. Cortex volume 13 issue 11 pages ... P, Garc a Mar n V, Freire M title Three dimensional reconstruction and quantitative study of a pyramidal ... on pyramidal neurons have focused on topics ranging from neuroplasticity to cognition . Structure gallery Image GFPneuron.png Pyramidal neuron visualized by Green fluorescent protein gfp Image Hippocampal pyramidal cell.png A Hippocampal Pyramidal Cell gallery Features One of the main structural features of the pyramidal neuron is the triangular shaped soma biology soma , or cell body, after which the neuron is named. Other key structural features of the pyramidal cell are a single axon , a large ... of inhibitory and excitatory synapses on hippocampal CA1 pyramidal cells journal Neuroscience volume ... Dendrite The apical dendrites arise from the apex of the pyramidal cell s soma. The apical dendrite ... name Megias Basal Dendrite The basal dendrites arise from the base of the pyramidal cell s soma. The basal ..., the basal dendrites branch profusely. ref name Megias Pyramidal cells are among the largest neurons in the brain. Both in humans and rodents, pyramidal cell bodies somas average around 20 m. Pyramidal ... length of a pyramidal cell may reach several centimeters. The pyramidal cell s axon is often even ... spines receive most of the excitatory impulses EPSP s that enter a pyramidal cell. Dendritic spines ... more details
A pyramidal number is a figurate number that represents a pyramid with a base and a given number of sides. The term is most often used to refer to square pyramidal number s, which have four sides, but it can also refer to Tetrahedral number Triangular pyramidal number three sides Square pyramidal number 4 sides Pentagonal pyramidal number five sides Hexagonal pyramidal number six sides Heptagonal pyramidal number seven sides The formula for a r gonal pyramid number is math X frac n 2 2 n 3 left frac r 6 frac 1 3 right n left frac r 5 6 right math disambig Category Figurate numbers eo Piramida nombro ... more details
Refimprove date June 2007 Infobox Anatomy Name Pyramidal eminence Latin eminentia pyramidalis GraySubject 230 GrayPage 1042 Image Gray914.png Caption The medial wall and part of the posterior and anterior walls of the right tympanic cavity, lateral view. Pyramidal eminence labeled at left, second from bottom. Image2 Caption2 System Precursor MeshName MeshNumber DorlandsPre e 06 DorlandsSuf 12328455 The pyramidal eminence pyramid is situated immediately behind the fenestra vestibuli , and in front of the vertical portion of the facial canal it is hollow, and contains the Stapedius muscle its summit projects forward toward the fenestra vestibuli, and is pierced by a small aperture which transmits the tendon of the muscle. The cavity in the pyramidal eminence is prolonged downward and backward in front of the facial canal, and communicates with it by a minute aperture which transmits a twig from the facial nerve to the Stapedius muscle. Gray s Auditory and vestibular anatomy Category Auditory system anatomy stub ... more details
taxobox name Pyramidal Orchid image AnacamptisPyramidalis.jpg regnum Plantae unranked divisio Angiosperms unranked classis Monocots ordo Asparagales familia Orchidaceae subfamilia Orchidoideae genus Anacamptis species A. pyramidalis binomial Anacamptis pyramidalis binomial authority Carolus Linnaeus L. Louis Claude Richard Rich. The Pyramidal Orchid , Anacamptis pyramidalis , is an orchid native to southwestern Eurasia , from western Europe through the Mediterranean region eastwards to Iran . In Germany , it is rare and was declared Orchid of the Year in 1990 to heighten awareness of this plant. File Fertilisation of Orchids figure 4.jpg thumb left alt Moth head with long proboscis protruding and curled down, attached to several pairs of pollen masses. Charles Darwin s book Fertilisation of Orchids included an illustration of the head of a moth with its proboscis laden with several pairs of Pollinium pollinia from the Pyramidal orchid, Orchis pyramidalis . This hardy perennial plant grows to a height of 30 cm. The colour of the flower varies from pink to purple, or rarely white, and the scent is described as foxy . The arrangement of Hermaphrodite hermaphroditic flowers in a compact pyramidal shape is very distinctive and gives the orchid its common name. The flowers are pollinated by Butterfly butterflies and moths . The mechanism by which its pairs of pollinium pollinia attach themselves to an insect s proboscis was discovered by Charles Darwin and described in his book on the Fertilisation ... pyramidalis var. tanayensis small Chenevard So in Keller small &ndash Tanay Pyramidal Orchid. Flowers ... var. urvilleana small Sommier & Caruana Kreutz small &ndash Maltese Pyramidal Orchid Malta . Anacamptis pyramidalis var. sanguinea small Druce Kreutz small &ndash Western Irish Pyramidal Orchid. Inflorescence ... can be found anywhere in the Pyramidal Orchid s range its flowers are white. Culture The Pyramidal Orchid ... es Anacamptis pyramidalis fr Orchis pyramidal hsb Pyramidowa w tromudka it Anacamptis pyramidalis ... more details
Pyramidal alkenes are alkene s in which the two carbon atom s making up the double bond are not coplanar with their four substituent s Ref . This deformation from a trigonal planar geometry to a tetrahedral molecular geometry is the result of angle strain induced in the molecule due to geometric constraints. Pyramidal alkenes only exist in the laboratory but are of interest because much can be learned from them about the nature of chemical bond ing ref Chemistry of pyramidalized alkenes Santiago V zquez, and Pelayo Camps Tetrahedron Volume 61, Issue 22, 30 May 2005 , Pages 5147 5208 DOI 10.1016 j.tet.2005.03.055 ref . In cycloheptene 1.1 the cis isomer is an ordinary unstrained molecule but the heptane ring is too small to accommodate a trans configured alkene group resulting in strain and twisting of the double bond. The p orbital misalignment is minimized by a degree of pyramidalization . In the related anti bredt molecule s it is not pyrimidalization but twisting that dominates. Image Cagealkenes.png center 300px Fig. 1 Pyramidal alkenes Pyramidalized cage alkenes also exist where symmetrical bending of the substituents predominates without p orbital misalignment. Image Anglestraindefinition.png center 400px Fig. 2 Angle definitions The pyramidalization angle math phi math b is defined as the angle between the plane defined by one of the doubly bonded carbons and its two substituents and the extension of the double bond and is calculated as math cos phi cos R C C cos 1 2 R C R math the butterfly bending angle or folding angle math psi math c is defined as the angle between two planes and can be obtained by averaging the two torsional angle s R1C CR3 and R2C CR4. In alkenes 1.2 and 1.3 these angles are determined with x ray crystallography as respectively 32.4 22.7 and 27.3 ... 10.1021 ol060994j ref , isolation of a pyramidal alkene is not even possible in by Matrix Isolation ... . References references Use dmy dates date September 2010 DEFAULTSORT Pyramidal Alkene Category Alkenes ... more details
A hexagonal pyramidal number is a number formed by adding the first few hexagonal numbers . The first few numbers are 1, 7, 22, 50, 95, 161, 252, 372, 525, 715, 946, 1222, 1547, 1925 OEIS id A002412 The numbers have the form math n n 1 4n 1 over6 math References http mathworld.wolfram.com HexagonalPyramidalNumber.html Hexagonal pyramidal number at MathWorld numtheory stub Category Figurate numbers fr Nombre pyramidal hexagonal it Numero piramidale esagonale ... more details
A pentagonal pyramidal number is a figurate number that represents the number of objects in a pyramid with a pentagonal base. ref name MathWorld MathWorld title Pentagonal Pyramidal Number urlname PentagonalPyramidalNumber ref The n sup th sup pentagonal pyramidal number is equal to the sum of the first n pentagonal number s. The first few pentagonal pyramidal numbers are 1 number 1 , 6 number 6 , 18 number 18 , 40 number 40 , 75 number 75 , 126 number 126 , 196 number 196 , 288, 405, 550, 726, 936, 1183, 1470, 1800, 2176, 2601, 3078, 3610, 4200, 4851, 5566, 6348, 7200, 8125, 9126 OEIS id A002411 . The formula for the n sup th sup pentagonal pyramidal number is ref name OEIS oeis A002411 ref math frac n 2 n 1 2 math so the n sup th sup pentagonal pyramidal number is the average of n sup 2 sup and n sup 3 sup . ref name OEIS The n sup th sup pentagonal pyramidal number is also n times the n sup th sup triangular number . The generating function for the pentagonal pyramidal numbers is ref name MathWorld math frac x 2x 1 x 1 4 . math See also Tetrahedral number Triangular pyramidal number Square pyramidal number References references Category Figurate numbers eo Kvinangula piramida nombro fr Nombre pyramidal pentagonal it Numero piramidale pentagonale ja ... more details
GFDL migration review Information Description Pyramidal Structure Source Bill Meyer Date 1986 Author Bill Meyer Permission Bill Meyer The Artist other versions ... more details
Image Square pyramidal 3D balls.png thumb right 200px Idealized structure of a compound with square pyramidal coordination geometry. In molecular geometry , square based pyramidal geometry describes the shape of certain compounds with the formula ML sub 5 sub where L is a ligand . If the ligand atoms were connected, the resulting shape would be that of a pyramid with a square base. The geometry is common for certain main group compounds that have a stereochemically active lone pair, as described by VSEPR theory . Certain compounds crystallize in both the trigonal bipyramidal and the square pyramidal structures, notably Ni CN sub 5 sub sup 3 sup . ref cite journal last1 Spiro first1 Thomas G. last2 Terzis first2 Aristides last3 Raymond first3 Kenneth N. doi 10.1021 ic50093a006 title Structure of Ni CN sub 5 sub sup 3 sup . Raman, infrared, and x ray crystallographic evidence year 1970 pages 2415 volume 9 journal Inorg. Chem. ref As a transition state in Berry Pseudorotation As a trigonal bipyramidal molecule undergoes Berry pseudorotation , it proceeds via an intermediary stage with the square planar geometry. Thus even though the geometry is rarely seen as the ground state, it is accessed by a low energy distortion from a trigonal bipyramid. Pseudorotation also occurs in square pyramidal molecules. Molecules with this geometry, as opposed to trigonal bipyramidal, exhibit heavier vibration. The mechanism used is similar to the Berry mechanism. Examples Some molecular compounds that adopt square pyramidal geometry are XeOF sub 4 sub , ref Square Pyramidal Molecular Geometry . VSEPR. http www.up.ac.za academic chem mol geom planpyr.htm ref and XF sub 5 sub X Cl, Br, I also have square pyramidal geometries. ref Square Pyramidal Geometry . http intro.chem.okstate.edu 1314F97 Chapter9 5BP1LP.html ref ref G. L. Miessler and D. A. Tarr Inorganic Chemistry 3rd Ed, Pearson Prentice ... pyramidal acac acetylacetonate, the anion of 2,4 pentanedione that has lost a proton . See also ... more details
A heptagonal pyramidal number is the sum of the first few heptagonal number s. The heptagonal number for n can be calculated by adding up the heptagonal numbers for 1 to n , or by using the formula n n 1 5 n 2 6. The first few heptagonal pyramidal numbers are 1 number 1 , 8 number 8 , 26 number 26 , 60 number 60 , 115 number 115 , 196, 308, 456, 645, 880, 1166, 1508, 1911, 2380, 2920, 3536, 4233, 5016, 5890, 6860, 7931, 9108 OEIS id A002413 Num stub Category Figurate numbers eo Sepangula piramida nombro fr Nombre pyramidal heptagonal it Numero piramidale ettagonale ... more details
Multiple issues wikify December 2010 orphan January 2011 Infobox molecular geometry Examples Image File Pentagonal pyramidal 3D balls.png Symmetry group Electron direction Atom direction Bond angle mu A pentagonal pyramidal structure is most commonly recognized as a pyramid with a base shaped like a pentagon . It is one of the few molecular geometries with uneven bond angle s. Image AX6E1 2D.png thumbnail 100px Examples XeOF sub 5 sub sup 1 sup , IOF sub 5 sub sup 2 sup References http mathworld.wolfram.com PentagonalPyramid.html MolecularGeometry DEFAULTSORT Pentagonal Pyramidal Molecular Geometry Category Molecular geometry ja ... more details
Image Square pyramidal number.svg thumb 360px Geometric representation of the square pyramidal number nowrap 1 1 4 9 16 30. File Mus e historique de Strasbourg Boulets en pierre.jpg thumb A pyramid of cannonball s in the Mus e historique de Strasbourg . The number of balls in the pyramid can be calculated as the fifth square pyramidal number, 55. In mathematics , a pyramid number , or square pyramidal number , is a figurate number that represents the number of stacked spheres in a pyramid with a square base. Square pyramidal numbers also solve the problem of counting the number of squares in an n × n grid. Formula The first few square pyramidal numbers are 1 number 1 , 5 number 5 , 14 number 14 , 30 number 30 , 55 number 55 , 91 number 91 , 140 number 140 , 204 number 204 , 285, 385, 506, 650, 819 OEIS id A000330 . These numbers can be expressed in a formula as math P n sum k 1 nk 2 frac n n 1 2n 1 6 frac 2n 3 3n 2 n 6 . math This is a special case of Faulhaber s formula , and may be proved by a straightforward mathematical induction . An equivalent formula is given in Fibonacci s Liber Abaci 1202, ch. II.12 . Relations to other figurate numbers The square pyramidal numbers can ... a square pyramidal number as the sum of two tetrahedral numbers in the same way as square numbers ... side of the diagonal. Square pyramidal numbers are also related to tetrahedral numbers in a different way math P n frac14 binom 2n 2 3 . math The sum of two consecutive square pyramidal ... and a pyramid number 4900, which is both the 70th square number and the 24th square pyramidal number. This fact was proven by G. N. Watson in 1918. In the same way that the square pyramidal numbers can ... n 1 2n 1 6 . math That is, the solution to the puzzle is given by the square pyramidal numbers. The number ... urlname SquarePyramidalNumber title Square Pyramidal Number Category Figurate numbers Category Pyramids ... nombro fr Nombre pyramidal carr it Numero piramidale quadrato hu Piramissz m ja sl Kvadratno ... more details
Infobox Bone Name Pyramidal process of palatine bone Latin processus pyramidalis ossis palatini GraySubject 41 GrayPage 168 Image Gray192.png Caption Medial wall of left orbit. Pyramidal process of palatine labeled at bottom right. Image2 Gray169.png Caption2 Left palatine bone. Posterior aspect. Enlarged. Pyramidal process labeled at bottom left. System Precursor MeshName MeshNumber DorlandsPre p 34 DorlandsSuf 12667617 The pyramidal process of the palatine bone projects backward and lateralward from the junction of the horizontal and vertical parts, and is received into the angular interval between the lower extremities of the pterygoid plate s. On its posterior surface is a smooth, grooved, triangular area, limited on either side by a rough articular furrow. The furrows articulate with the pterygoid plates, while the grooved intermediate area completes the lower part of the pterygoid fossa and gives origin to a few fibers of the Pterygoideus internus. The anterior part of the lateral surface is rough, for articulation with the tuberosity of the maxilla its posterior part consists of a smooth triangular area which appears, in the articulated skull, between the tuberosity of the maxilla and the lower part of the lateral pterygoid plate, and completes the lower part of the infratemporal fossa. On the base of the pyramidal process, close to its union with the horizontal part, are the lesser palatine foramina for the transmission of the posterior and middle palatine nerve s. Additional images gallery Image Gray187.png Base of skull. Inferior surface. gallery External links RocheLexicon 34257.000 1 Gray s Facial bones Category Bones of the head and neck musculoskeletal stub ... more details
Infobox molecular geometry Image File Pyramidal 3D balls.png Symmetry group Cyclic symmetries C sub 3v sub Electron direction 4 Atom direction 3 Bond angle 109.5 , 107 mu Examples ammonia NH sub 3 sub , phosphorus trichloride PCl sub 3 sub In chemistry , a trigonal pyramid is a molecular geometry with one atom at the Apex geometry apex and three atoms at the corners of a trigonal base. When all three atoms at the corners are identical, the molecule belongs to Molecular symmetry point group C sub 3v sub . One example of a molecule with a trigonal pyramidal geometry is ammonia NH sub 3 sub . Some molecules and ions with trigonal pyramidal geometry include the xenon trioxide molecule, XeO sub 3 sub , the chlorate ion, ClO sub 3 sub sup sup , the sulfite ion, SO sub 3 sub sup 2 sup , and the phosphite ion, PO sub 3 sub sup 3 sup . In organic chemistry, molecules which have a trigonal pyramidal geometry are sometimes described as orbital hybridisation sp sup 3 sup hybridized . The AXE method for VSEPR theory states that the classification is AX sub 3 sub E. Citation needed date January 2008 Trigonal pyramidal geometry in ammonia The nitrogen molecule in ammonia has 5 valence electron s and bonds with three hydrogen atoms to complete the octet rule octet . This would result in the geometry of a regular tetrahedron with each bond angle inverse trigonometric function cos sup 1 sup 109.5 . However, the three hydrogen atoms are repelled by the electron lone pair in a way that the geometry is distorted to a trigonal pyramid regular 3 sided pyramid with bond angles of 107 . In contrast, boron trifluoride is flat, adopting a trigonal planar geometry because the boron does not have a lone pair of electrons. In ammonia the trigonal pyramid undergoes rapid nitrogen inversion . ref name Cleeton Claud E. Cleeton C. E. Cleeton & Neal H. Williams N. H. Williams , 1934 http prola.aps.org ... Visual MolecularGeometry Category Stereochemistry Category Molecular geometry ja sv Trigonal pyramidal ... more details
Infobox Anatomy Name Pyramid of thyroid Latin lobus pyramidalis glandulae thyroideae GraySubject 272 GrayPage 1269 Image Gray1174.png Caption The thyroid gland and its relations. Pyramid labeled at center left. Image2 Illu08 thyroid.jpg Caption2 Thyroid System Precursor MeshName MeshNumber The pyramidal lobe is the third Lobe anatomy lobe of conical shape frequently arises from the upper part of the isthmus, or from the adjacent portion of either lobe, but most commonly the left, and ascends as far as the hyoid bone . It is occasionally quite detached, or may be divided into two or more parts. External links SUNYAnatomyFigs 26 01 04 Gray s Endocrine system Category Endocrine system anatomy stub ... more details
wiktionarypar peakPeak may refer to Arts and Fashion The British English term for the part of a hat known as the visor in American English Peak Practice , a British television drama series Peak Performance , a sports clothing brand from Sweden Peak, a sneakers brand from China Computing PEAKS software a proteomic mass spectrometry software, used to identify and quantitate proteins peptides. BIAS Peak a professional audio editing program on the Apple platform Geography and geology A mountain peak, see summit topography Hubbert peak theory or peak oil , a theory that oil production worldwide is expected to reach a maximum level after which it will decline More specifically, a pyramidalpeak , a mountaintop that has been sculpted by erosion to form a point Mathematics and Physics The highest, or sometimes the highest and lowest see peak to peak , points on a varying waveform Peak electricity usage times or peak demand, see Energy demand management Peak mathematics , an n 3 dimensional element of a polytope Pharmacology Peak pharmacology Peak or when a drug reaches its maximum plasma concentrations Psychology Peak experiences Transportation The Parts of a sail Non triangular fore and aft sails highest corner of a four sided, fore aft sail A nicknamed used to refer to the British Rail Class 44 diesel locomotives, and also classes 45 and 46 As a proper noun Peak Sport , Chinese sports apparel manufacturer Peak Records , a record label Peak to Peak Charter School Proper geographical names include Peak District in the north of England Pikes Peak in Colorado, United States Victoria Peak in Hong Kong Peak, a village in Ya Tung , Cambodia Book title Peak novel Peak novel , written by Roland Smith. See also The Peak disambiguation Peak hour Peek disambiguation Disambig be x old bg de Spitze ja pl Szczyt ro V rf sl Vrh ... more details
The Peak may refer to The Peak Hong Kong , a mountain in Hong Kong The Peak newspaper The Peak newspaper , a student newspaper of Simon Fraser University in Burnaby, British Columbia, Canada The Peak Twin Towers , an apartment building in Jakarta, Indonesia The Peak TV series The Peak TV series , a TV series in Singapore The Peak District of northern England CFBV , a radio station branded The Peak based in Smithers, British Columbia . See also Peak disambiguation disambig ... more details
A mountain peak is the highest part pyramidalpeakpeak of a mountain a mountaintop the summit topography summit . Mountain Peak may also refer to Blue Mountain Peak , Jamaica Hole in the Mountain Peak , Nevada, USA geodis Category Set indices on mountains ... more details
Orphan date February 2009 Atherton Peak coord 54 7 S 36 45 W is a pyramidalpeakpeak rising to about 500 m east of Fortuna Bay , South Georgia . Charted by DI, 1929 30, and named after Noel Atherton , cartographer in the Admiralty Hydrographic Office at that time Chief Civil Hydrographic Officer , 1951 62. usgs gazetteer Category Mountains and hills of South Georgia SouthGeorgia geo stub ... more details
Not to be confused with Steeple Jason Jason Peak coord 54 11 S 36 37 W is a pyramidalpeakpeak , 675 m, lying 1 mile 1.6 km west of Jason Harbour on the north coast of South Georgia . The name appears to be first used on a 1929 British Admiralty chart. usgs gazetteer Category Mountains and hills of South Georgia SouthGeorgia geo stub ... more details
Orphan date February 2009 Bomford Peak coord 54 8 S 37 38 W is the highest pyramidalpeakpeak , 1,140 m, located centrally on the cove between Wilson Harbour and Cheapman Bay on the south side of South Georgia . Surveyed by the SGS in the period 1951 57 and named for Captain Anthony G. Bomford , R.E., senior surveyor of the SGS, 1955 56. usgs gazetteer Category Mountains and hills of South Georgia SouthGeorgia geo stub ... more details
Smillie Peak coord 54 17 S 36 57 W is a rock pyramidalpeakpeak , 1,765 m, standing 1 mile 1.6 Kilometer km east of Mount Corneliussen in the west extremity of the Allardyce Range of South Georgia . Surveyed by the SGS, 1951 52, and named by the United Kingdom Antarctic Place Names Committee UK APC for Gordon Smillie , SGS surveyor. usgs gazetteer SouthGeorgia geo stub category Mountains and hills of South Georgia ... more details
Ridge Peak coor dm 63 30 S 57 3 W is a pyramidal rocky summit topography peak , 510 m, from which a prominent ridge extends eastward, standing 2.5 nautical miles 4.6 km southwest of Trepassey Bay between Cairn Hill and Lizard Hill on Tabarin Peninsula . This area was first explored by a party of the Swedish Antarctic Expedition , 1901 04. Ridge Peak was charted and named by the Falkland Islands Dependencies Survey FIDS , 1946. usgs gazetteer antarctica geo stub Category Mountains of Antarctica ... more details
Orphan date February 2009 Zurn Peak coord 75 44 S 115 40 W is a rocky pyramidalpeakpeak 1,515 m rising from the north edge of Toney Mountain , about 4 mile s 6 Kilometer km northeast of Richmond Peak , in Marie Byrd Land . Mapped by United States Geological Survey USGS from surveys and U.S. Navy air photos, 1959 71, it was named by the Advisory Committee on Antarctic Names US ACAN for Walter A. Zurn , Station Scientific Leader at South Pole Station , in 1972. usgs gazetteer Category Mountains of Marie Byrd Land WAntarctica geo stub de Zurn Peak ... more details
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