Encyclopedia results for Nephelinite

1. Nephelinite
   
   Image Uvalde columns.jpg thumb Columnar jointing in melilite olivine nephelinite from the Southern Balcones volcanic and intrusive rocks, Uvalde County, Texas. Nephelinite is a fine grained or aphanitic ..
   
   
   
   
2. Ijolite
   
   of melanite garnet . This rock is the plutonic and holo crystalline analogue of the nephelinite s and nepheline ..
   
   
   
   
3. Basanite
   
   SiO sub 2 sub , as evident on the diagram used for TAS classification . Nephelinite is yet richer ..
   
   
   
   
4. Volcano Mountain
   
   nephelinite , which is a very uncommon type of lava. This type of lava is believed to have come from ..
   
   
   
   
5. List of rock types
   
   Marble Marl Migmatite Monzogranite Monzonite Mudstone Mylonite N Nepheline syenite Nephelinite ..
   
   
   
   
6. Hawaii hotspot
   
   gabbro and diabase . Rarely, there are igneous rocks with compositions unlike basalt, such as nephelinite ..
   
   
   
   
7. Hawaiian eruption
   
   late stages after a period of erosion, rocks of unusual composition such as nephelinite were produced ..
   
   
   
   
8. Deccan Traps
   
   are tholeiitic basalt s, however other rock types occur Alkali basalt s Nephelinite s Lamprophyre ..
   
   
   
   
9. Bruntál
   
   of Nephelinite nepheline basalt and nephelinite . The effusive phase is approximately 2.4 0.5 ..
   
   
   
   
10. Mount Nyiragongo
    
    at Nyiragongo is often unusually fluid . Nyiragongo s lavas are made of melilite nephelinite ..
    
    
    
    
11. Igneous rock
    
    . A normative feldspathoid classifies a rock as silica undersaturated an example is nephelinite .... American Mineralogist, v. 92, p. 370 379 ref Magmas of rock types such as nephelinite , carbonatite ..
    
    
    
    
12. Geology of Tasmania
    
    tholeiite Ma 30.7 , alkaline basalt, and olivine nephelinite . Lava flows in the north east flowed ... Ma. On the southern part of the Central Plateau there are olivine melilite nephelinite, olivine nephelinite ..
    
    
    
    
13. Lava
    
    , pp404 405, ISBN 0 7167 1456 6 ref Olivine nephelinite lavas are a unique type of lava that is thought ..
    
    
    
    
14. Hawaiian Islands
    
    basalt, such as nephelinite , do occur on these islands but are extremely rare. The majority of eruptions ..
    
    
    
    
15. Volcanism in Canada
    
    that erupted at Volcano Mountain in the Yukon , which is called olivine nephelinite. Canada ..
    
    
    
    
16. Anahim hotspot
    
    igneous rock types with composition unlike basalt, such as nephelinite , do occur at the small basaltic ..
    
    
    
    
17. Geology of the Pacific Northwest
    
    , where lava olivine nephelinite occurs. The last eruption in the field was about 400 years ..
    
    
    
    

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