Flashcards
Geology-Igneous Rocks
Cards in this deck (6)
- 1Extrusive Igneous Rocks Below 1mm crystal sizeSlicate- 66-70% Silica- Ryolite and Daclite
Intermediate- more than 52%- Andicite
Mafic- more than 45%- Basalt
Glassy-Obsidian - 2Intrusive + extrusive igneous rocks -(silicate gran,Micro- gran, Rhyolite) Chemical composition and Main MineralsSilicate-Orthoclase feldspar=50%-30%, Quartz 20%, Plag Feldspar 10%-20%,Muscovite 10-3%, Biotite 5-10%, Amphibole 0-5%
Higher in K20 - 3Intrusive+ Extrusive igneous rocks (silicate- Dacite ,Micro gran-di, gran di) Chemical composition and Main Minerals.Orthoclase feldspar 15-25%, Quartz 20%, plagioclase Feldspar 22-35%, Biotite 10-20%
Higher in Na2O plag rich - 4Intrusive + extrusive Igneous rocks (intermediate- Andecite, Micro-di,Diorite) Main MineralsOrthoclase feldspar 5-10%, Quartz 5-10%, Plagioclase Feldspar 45-55%, Biotite 10-20%, Amphibole 10-20%
- 5Intrusive (hypabyssal) Igneous RocksSilicate- 66-70%silica- Micro Granite, Micro Granite-Diorite.
Intermediate- more than52%-Micro diorite
Mafic- more than 45%- Dolerite - 6Intrusive (plutonic) Igneous RocksSilicic- 66-70%silicic- Granite , Micro diorite.
Intermediate- more than 52%- Diorite
Mafic- more than 45%-gabbro
Ultra Mafic- less than 45%- Peridotite
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- Flashcards on Geology-Igneous Rocks, created by holliebishop1996 on 05/03/2014.
- Created by
- holliebishop1996 · Mar 2014
- Updated
- Feb 19, 2016
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