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Rocks
Types - Examples etc.
| Term | Definition |
|---|---|
| Igneous | Formed as a result of Magma from under the earth's crust - May be Intrusive OR Extrusive |
| Sedimentary | Formed as a result of the build-up of dead organisms - the sediment is laid down in layers called Strata |
| Metamorphic | Rock which undergoes change as a result of pressure or heat |
| Presence of Silica - and the amount of Silica indicates |