click below
click below
Normal Size Small Size show me how
Geology
Minerals and rocks
Term | Definition |
---|---|
Minerals | A naturally occurring substance that is solid, inorganic, chemical composition an atomic structure |
Rocks | A natural occurring solid aggregated of minerals or mineraloids |
Hardness | Toughness on Mohs scale |
Cleavage | How the mineral breaks |
Luster | Shininess or dullness of a mineral |
Streak | The color a mineral leaves behind when scratched |
Crystal form | The shape of crystals |
Silicate minerals | Largest and most important rock forming group. Containing silicon and oxygen |
Nonsilicate minerals | Minerals not containing silicon |
Rock cycle | The life of rocks and their formation |
Intrusive (igneous) | Minerals made inside the earth cooling slowly |
Extrusive (igneous) | Minerals made outside the earth cooling fast |
Foliated (metamorphic) | Layers in rocks and minerals |
Non foliated (metamorphic) | No layers in rocks and minerals |
Chemical (sedimentary) | Mineral constituents in solution become supersaturated and inorganically precipitated |
Organic (sedimentary) | Minerals being made of a once living thing |
Clastic (sedimentary) | Composted of fragments |