Zoe:P

2. rock that consists of smooth pebbles embedded in hardened clay or sand
5. the poorest quality of coal
6. if you are a rock hound, this is a useful tool for you
8. sometimes called plutonic rock
9. this states that any undisturbed strata lie in the order they were laid down
10. this is also known as volcanic rock
12. the sand, clay, or rock fragments that are transported by physical means and deposited in a thick layer elsewhere
13. this is considered an organic sedimentary rock
14. this results when rocks are baked by contact with hot metal
17. it must consist of 50% of calcium carbonate to be considered this
18. rocks that form when magma solidifies
19. about 50% of coal mined underground is retrieved through…
21. some form through the evaporation of surface water
22. perhaps the most beautiful, widely used nonfoliated rock is…

1. a common coarse grained igneous rock that composes most of the earth's continental crust
3. hard, round structures that form when minerals settle out of water and crystalize around a sand grain or other mineral fragment.
4. an example of this is slate
7. this method of underground coal extraction uses a continuous miner
11. layered formations usually buried in other sedimentary rocks like sandstone or shale
15. a rock that is formed from fragments of other rocks
16. nonrenewable that is found in the earth and is believed to have formed from the remains of once living things
20. a dense, coarse-grained intrusive igneous rock that ranges from dark green to black