4 classifications of minerals silicates - non-ferromagnesian – non make up 8% of the earths crust, include the carbonates , oxides , and native minerals like gold and silver. Non silicates contains silicon and oxygen. Highly attracted to oxygen Makes up 92% of the earths crust silicates. Contains iron and magnesium. Dark in color, dense, glassy luster ferromagnesian. Most abundant is feldspar. Very common, low density, light in color non ferromagnesian. Physical mixtures of minerals rocks 3 types of rocks igneous, sedimentary, metamorphic. Formed by cooling and crystallization of magma or lava and that has erupted at the earths surface through a volcano or crack in the crust Igneous rock. Ex. - Basalt – granite igneous rock. What are the three contributing factors to the formation of magma Temperature, pressure increases, and water.
Three types of magma Basaltic, andesitic, granitic. All three types of magma are found in different? Tech tonic Settings. All three types of magma create? A variety of igneous rock “pushes into" Intrusive. Mag mount that cools and solidifies underground Intrusive. Also called plutonic rock Intrusive. The results of intrusive rocks creeping into the fractures in the crust Dykes. The largest plutons Batholiths. Form the core of the major mountain chains Batholiths and Dykes. Rocks that form from land erupting from sea pages on land or in the same floor Extrusive. Often called volcanic rock Extrusive. Contains small crystals and cools very quickly Extrusive. Examples - obsidian Glassy. Crystals that are visible without a microscope Example - granite Coarse-grained. Micro scopic crystals Example - promise Fine-grained. Crystals of two different sizes example - andesite, porphyric.
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- Spring '14
- Minerals, Sedimentary rocks, earths crust silicates, Minerals