Sedimentary Flashcards
1
Q
Rock Salt :
How does it form?
What’s it composition?
A
- Evaporation of ocean or Saline waters
- Halite (NaCl)
2
Q
Conglomerate
- where does it form?
- what’s it composition
A
- Strong water current brings down pebbles to be bonded by sand/mud/chemical cement
- mostly gravel
3
Q
Limestone (calcarenite fossiliferous
- where does it form?
- what’s it composition
A
- forms in clear warm/water shallow / marine filled —> accumulation of shell/coral/algal fecal debris
- Calcium Carbonate (calcite)
4
Q
Sand stone
- where does it form?
- what’s it composition?
A
- Accumulation of river sediment - that’s then compressed
- Quartz / Feldspar cemented with silt-clay size particles
5
Q
Chalk
- where does it form?
- what’s it composition?
A
- deep marine conditions from Gradual accumulation of minute calcite shells shed from micro organisms
- Calcium Carbonate
6
Q
Coquina
- where does it form?
- what’s it composition?
A
- Mixed up shells cemented by calcite
- shells / gravel
7
Q
Shale
- where does it form?
- what’s it composition?
A
- compaction of silt - clay size particles
- Clay / Silt
8
Q
Mudstone
- where does it form?
- what’s it composition?
A
- Slow energy / ocean/ lake water through compaction
- clay / silt
9
Q
Clay stone
- where does it form?
- what’s it composition?
A
- Burial & Deposition of clay/silt in low energy places
- clay / silt
10
Q
Oolitic Limestone
- where does it form?
- what’s it composition?
A
- Calcium carbonate is deposited on the surface of sand grains that are rolled by waves on a shallow sea floor
- calcite
11
Q
Chert
- where does it form?
- what’s it composition?
A
- Marine life skeletons recrystallize in the ocean in shallow waters
- silicon dioxide
