| A | B |
|---|
| rock | a naturally occuring solid mixture of one or more minerals of organic matter |
| composition | the chemical makeup of a rock;describes either the minerals or other materials in the rock |
| texture | the quality of a rock that is based on the sizes,shapes,and positions of the rock's grains |
| Intrusive Igneous Rock | When magma does not reach Earth's surface,it cools in large chambers,in cracks,or between layers,coarse-grained texture |
| Extrusive Igneous Rock | Igneous rock that forms when lava erupt,or extrudes onto Earth's surface is common around the sides and bases of volcanoes |
| Clastic Sedimentary Rock | Clastic sedimentary rock forms when sediments are buried,compacted,and semented together by calcite or quartz |
| Chemical Sedimentary Rock | Chemical sedimentary rock forms when water usually seawater,evaporates.Most water contains dissolved minerals. |
| Organic Sedimentary Rock | forms from the remains, or fossils of once-living plants and animals. |
