5) Sedimentary Rocks

Question 0

Chemical sedimentary rocks

Answer 0

1) limestone-mostly calcite
2) dolostone- 50% dolomite, forms by additions of Mg to calcite
3) evaporites- consist of precipitated halides, Sulfates, borates ect.
4) chert- finely crystalline silica deposited on ocean floor

Question 1

Detrital/clastic rocks

Answer 1

Conglomerate: dominated by rounded granules or larger rock or mineral fragments
Sandstone: dominated by sand-sized grains
Shale: silt or mud-sized grains

Question 2

Biochemical

Answer 2

Coal: concert organic matter, usually from swamps
Black shale: shale with carbonized algae
Fossil-bearing limestone