/ sedimentary.html
sedimentary rocks.
Sedimentary rocks form from material that has been broken down, transported, depositied, and preserved at the earths surface; we call this material sediment
the sedimentary system.
Sedimenatry rocks are the result of a series of processes:
- weathering → breaking down rock
- erosion & transport → moving sediment
- deposition → settling into layers
- lithification → turning sediment into rock
lithification.
classification of sedimentary rocks.
wentworth grain scale
class name:sand
phi (φ) scale:-1 to +4 φ
size range:0.062 mm – 2.0 mm
test:Gritty friction; quartz & feldspar grains identified with hand lens.
environment:Beaches, sand dunes, and active river beds. Transported by moderate currents.