click below
click below
Normal Size Small Size show me how
Sedimentary
7th grade rock unit
Question | Answer |
---|---|
Sediments | Pieces of rock broken off from other rock by weathering |
The type of rock that is made from bits of rock cemented and compacted together. | Clastic sedimentary rock |
Cementation | Minerals that were dissolved recrystallize (through evaporation)to hold sediments together. |
Compaction | squeezing the sediments together |
Weathering | The process of breaking down rock by things such as wind, water, and ice. |
Erosion | Carrying sediments from one place to another, by wind, water, ice, and gravity. |
Deposition | Sediments piling up on top of each other. |
Chemical sedimentary rock | Rock formed from minerals that were dissolved and recrystallize after evaporation |
Organic sedimentary rock | Rock with bits of bone, shell, or other once-living matter |
lithification | The process of forming rock by compaction and cementation |
Grain size in clastic sedimentary rocks | The size of sediments in the rock |
The order of events that create a sedimentary rock | WEDCC (weathering, erosion, deposition, compaction, cementation) |
A rock that is sometimes listed as chemical sedimentary and sometimes listed as organic sedimentary | Limestone - If it has fossils, it is organic, otherwise it is chemical. |
A rock that has no visible fossils that is in the organic category. | Bituminous coal |
What the following rocks have in common: sandstone, shale, conglomerate, and breccia | Common clastic sedimentary rocks |
Detrital | A synonym for clastic sedimentary rock |