UK Geology Flashcards
Give 3 examples of igneous rocks
Granite, Diorite and Andesite
3 examples of sedimentary rocks
Chalk, Limestone, Shale
3 examples of metamorphic rocks
Marble, Slate, serpentine
How are igneous rocks formed
Lava cools and hardens. Rocks form crystals as it cools down, rocks are usually hard e.g. granite
How are sedimentary rocks formed
Lots of rocks, dead animals and dead plants fall to the bottom of a body of water, as more fall down, pressure builds and the air bubbles down below get forced out, the sediment is then compressed into rock
How are metamorphic rocks formed
These are formed when other rocks ( igneous and sedimentary ) I changed by heat and pressure. Rock becomes harder and more compact, and example is shale become slate and further heat changes slate to schist