Rocks And Their Formations Flashcards
What are two examples of igneous rocks
Granite and basalt
How are igneous rocks formed
When magma or lava solidifies inside or outside the volcano
What are characteristics of igneous rocks
Interlocking crystals, which make them hard and resistant to erosion
Some have small crystals if they cooked quickly
Some have large crystals if the liquid rock cools slowly
How are sedimentary rocks formed
They are formed when layers of sediment at compacted (squashed together) over millions of years by being buried under more layers
What are two examples of sedimentary rock
Chalk and limestone
What are chalk and limestone
Natural forms of calcium carbonate
What may sedimentary rocks contain
Fossils
How are metamorphic rocks formed
The sedimentary rock turns to a semi solid after it has been put under heat and pressure and re-solidifies to form metamorphic rock