Sedimentary rocks Flashcards
1
Q
What are the classifications of a sedimentary rocks?
A
Clastic, chemical, and bio-chemical
2
Q
Define clastic:
A
Formed from fragments of other rocks and minerals (e.g., sandstone, shale, conglomerate).
3
Q
Define chemical:
A
Formed from the precipitation of dissolved minerals from water (e.g., limestone, rock salt).
4
Q
Define biochemical:
A
Made up of minerals from organic processes usually found in water
5
Q
Clastic minerals:
A
Conglomerate (Rounded clasts), Breccia (Angular clasts) , sandstone (Sand-sized clasts) , shale, mudstone, siltstone (Clay/silt clasts)
6
Q
Chemical minerals:
A
Rock salt, rock gypsum, limestone, chert
7
Q
Biggest indicator of chert?
A
It scratches glass.
8
Q
Biochemical minerals:
A
Limestone, chert
