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Types of Rocks
Vocabulary associated with types of rocks
| Term | Definition |
|---|---|
| Granite | a usually light-colored igneous rock that is found in the continental crust |
| Basalt | a dark, dense igneous rock with a fine texture, found in the oceanic crust. |
| Texture | the look and feel of a rock’s surface, determined by the size, shape, and pattern of a rock’s grains. |
| Sedimentary Rock | a type of rock that forms when particles from other rocks or the remains of plants and animals are pressed and cemented together |
| Sediment | small, solid pieces of material that comes from rocks or organisms; earth materials deposited by erosion |
| Rock Cycle | a series of processes on the surface and inside Earth that slowly changes rocks form one kind to another |
| Organic Rock | sedimentary rock that forms from remains of organisms deposited in thick layers |
| Metamorphic Rock | a type of rock that forms from an existing rock that is changed by heat, pressure or chemical reactions |
| Intrusive | igneous rock that forms when magma hardens beneath Earth’s surface |
| Igneous Rock | a type of rock that forms from the cooling of molten rock, at or below the surface |
| Grains | the particles of minerals of other rocks that give a rock its texture |
| Foliated | term used to describe metamorphic rocks that have grains arranged in parallel layers or bands. |
| Extrusive | igneous rock that forms from lava on the Earth’s surface |
| Erosion | the process by which water, ice, wind, or gravity moves weathered rock or soil |
| Deposition | process in which sediment is laid down in new locations |
| Compaction | the process by which sediments are pressed together under their own weight |
| Clastic Rock | sedimentary rock that forms when rock fragments are squeezed together under high pressure |
| Chemical Rock | sedimentary rock that forms when minerals crystallize from a solution |
| Cementation | the process by which dissolved minerals crystallize and glue particles of sediment together into one mass |