| A | B |
|---|
| basaltic | dark-colored igneous rock formed from magma rich in magnesium and iron |
| cementation | process in which sediment is held together by natural cements when water moves through rock and soil |
| compaction | layers of sediments are compressed by the weight above them |
| extrusive | igneous rock that forms when magma cools quickly at the Earth's surface |
| foliated | metamorphic rock whose mineral grains line up in parallel layers |
| granitic | igneous rock that is light-colored |
| igneous rock | rock formed when magma or lava cools and hardens |
| intrusive | igneous rock that forms when magma cools slowly beneath Earth's surface |
| sedimentary rock | rock most likely to contain fossils and is formed when layers of sand, silt, clay, or mud are cemented and compacted together |
| sediments | loose materials that have been moved by wind, water, ice, or gravity |
| rock cycle | model that describes how rocks change from one form to another |
| rock | mixture of one or more minerals, rock fragments, volcanic glass, organic matter, or other natural materials |
| nonfoliated | metamorphic rock whose mineral grains do not form layers |
| metamorphic rock | forms when heat, pressure, or fluids change the form or composition |
| lava | molten rock that flows from volcanoes onto Earth's surface |
