Question 15
RocksWhich of the following is not a characteristic of sedimentary rocks? They
- A.contain fossils
- B.are crystalline
- C.are usually laid down in layers
- D.are porous
Show the answer and explanation
Answer: B (are crystalline)
Explanation
Crystals form when magma cools (igneous) or rocks are changed by heat (metamorphic); sedimentary rocks are made of particles, not crystals.