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Keywords rocks
Term | Definition |
---|---|
Igneous rocks | Rocks formed by volcanic activity |
Sedimentary rocks | Rocks made from sediments underwater that are cemented and compressed together |
Metamorphic rocks | Sedimentary or igneous rocks that are changed into metamorphic because of great heat and pressure |
Intrusive rocks | Rocks that are made inside of the earths crust |
Extrusive rocks | Rocks that were made outside of the earths surface |
Fossils | The remains of ancient creatures |
Shaft mining | The process of extracting coal from the earths crust |
Limestone | A grey sedimentary rock often found with sea creature remains |
Sandstone | A red/cream/brown sedimentary rock formed with worn away sand |
Marble | A white/green/black smooth metamorphic rock (was originally limestone before) |
Quartz | A white/grey grainy metamorphic rock (was originally sandstone) |