sedimentary rock mod e. u.3 l.3. definition rock that forms when sediments are compacted and...
TRANSCRIPT
Formation (processes)•Weathering and erosion break down existing rock into sediment.
•Sediment is deposited in layers called strata
(Think Grand Canyon)
1. Clastic
Classified by texture• Fine grained e.g. Shale (from
mud)• Medium –grained e.g.
Sandstone (from sand)• Coarse-grained e.g.
Conglomerate (from pebbles)
Chalk: A fine-grained, light-colored limestone formed from the calcium carbonate skeletal remains of tiny marine organisms.
3. Chemical•Minerals dissolved in water are crystallized when water evaporates
e.g.Limestone: calcium carbonate or calcite
Rock Salt or "halite" is a chemical sedimentary rock - forms from the evaporation of ocean or saline lake waters.
Sedimentary rocks formed as chemical precipitates.
Name of Rock
Precipitate Type
Halite Sodium Chloride
Gypsum Calcium sulfate
Silcretes Silica
Limestone Calcium Carbonate
Dolomite Calcium Magnesium Carbonate