biochemical sedimentary rock
Sedimentary rock formed from material (such as shells) produced by living organisms.
Coarse sedimentary rock consisting of angular fragments; or rock broken into angular fragments by faulting.
The phase of lithification in which cement, consisting of minerals that precipitate from groundwater, partially or completely fills the spaces between clasts and attaches each grain to its neighbor.
chemical sedimentary rock
Sedimentary rock made up of minerals that precipitate directly from water solution.
clastic sedimentary rock
Sedimentary rock consisting of cemented-together detritus derived from the weathering of preexisting rock.
A lamination inclined to the main bedding; it represents the slip face of a layer deposited in a current.
Changes that happen to sediment or sedimentary rock during and subsequent to lithification but at temperatures less than that of the lowest grade metamorphism.
A layer of clastic sediment or sedimentary rock in which clast size progressively decreases from the base to the top of the bed; graded beds form by deposition from a turbidity current.
The transformation of loose sediment into solid rock through compaction and cementation.
organic sedimentary rock
Sedimentary rock (such as coal) formed from carbon-rich relicts of organisms.
Wave-like ridges and troughs on the surface of a sedimentary layer formed during deposition in a current.
Rock that forms either by the cementing together of fragments broken off preexisting rock or by the precipitation of mineral crystals out of water solutions at or near the Earth_s surface.
A characteristic of sedimentary deposits that pertains to the character of bedding and/or the surface features of a bed.
(1) The range of clast sizes in a collection of sediment; (2) the degree to which sediment has been separated by flowing currents into different-size fractions.
A recognizable layer of a specific sedimentary rock type or set of rock types, deposited during a certain time interval, that can be traced over a broad region.
A carbonate rock formed by precipitation of carbonate minerals from water at springs or on the surface of caves.