Geology - Type Of Rock - COASTS

Question 1

What are the three types of rocks?

Answer 1

1. Igneous
2. Metamorphic
3. Sedimentary

Question 2

Igneous example, rate of erosion, structure of rock

Answer 2

Examples - granite, basalt
Rate of erosion - very slow ( 0.1cm a yr)
Structure of rock - interlocking crystals which allow high resistance

Question 3

Metamorphic example, rate of erosion, structure of rock

Answer 3

Examples - Slate, marble, schist
Rate of erosion - slow ( 0.1-0.3 a yr)
Structure of rock - crystal all in same direction

Question 4

Sedimentary example, rate of erosion, structure of rock

Answer 4

Examples - Limestone
Rate of erosion - Very fast ( 0.5 - 10 cm a yr)
Structure of rock - lots of fractures and bedding planes which make them weak