Types of Rocks
Terms
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- foliated
- the texture of metamorphic rock in which the mineral grains are aligned like the pages of a book
- strata
- layers of sedimentary rock that form from the deposition of sediment
- extrusive
- the type of igneous rock that forms when lava or pyroclastic material cools and solidifies on the Earth's surface
- composition
- the makeup of a rock; describes either the minerals or elements present in it
- rock cycle
- the process by which rock one rock type changes into another
- sedimentary rock
- rock that forms when sediments are compacted and together
- magma
- molten rock that is inside the Earth
- metamorphic rock
- rock that forms when the texture and composition of preexisting rock changes due to heat and pressure
- stratification
- the layering of sedimentary rock
- igneous rock
- rock that forms from the cooling of magma or lava
- intrusive
- the type of igneous rock that forms when magma cools and solidifies beneath Earth's surface
- fossils
- are the remais or traces of plants or animals tht have been preserved in sedimentary rock
- nonfoliated
- the texture of metamorphic rock in which mineral grains show no alignment
- rock
- is a solid mixture of crystals of one or more minerals or other materials
- texture
- the sizes, shapes, and positionsof the grains that a rock is made of