Fragmental organic remains (Shells/ skeletal of marine invertebrates)
The consolidation of rock-forming material into coherent rock mass
The open space between grains of sediment
Sand-sized spherical particles of laminae of calcium carbonate
Fine grained particles deposited at the same time as larger particles which help to hold the particles together. (Ex. clay)
A layer in a stratified rock sequence which is greater than 1 cm thick and has well defined upper and lower boundaries.
A "dirty" sandstone. More quartz and less feldspar than graywacke and more rock peices. Greater textural maturity than graywacke.
A fine grained clastic sedimentary rock formed by the compaction and consolidation of clay, silt, or mud that is characterized by finely laminated structures (very thin layers).
The deposition of crystalline solids which were carried in solution.
A measure of the size and shape variation of particles in a sedimentary rock. Increased textural maturity is characterized by decreased size variation and round particles.
A measure of the uniformity of particle size in a sediment or sedimentary rock
The degree to which sharp edges and corners of a particle are worn away
A course-grained clastic sedimentary rock composed of particles greater than 4 mm in diameter held together by a matrix or mineral cement.
The reduction of pore spaces between sediment grains as a result of pressure. In compaction sediment grains are bound together by a fine-grained matrix.
Describes a rock composed of broken fragments of rocks, minerals, or skeletal remains held together in cement or a matrix.
A highly porous, bioclastic sedimentary rock composed of shells that is weakly held together with little to no matrix.
A measure of the amount of weathering, erosion, and transport experienced by the sediments which form a sedimentary rock.
A rock formed from the compaction of peat over long periods of time.
A poorly sorted sand that contains angular grains and sediments relatively unstable to weathering (Ex. Feldspar).
A property of some sedimentary rocks to separate into thin flat layers along bedding planes.
Describes a sedimentary rock which is composed of crystals precipitated from a saturated solution. Fine grained crystals form an interlocking mosaic.
A thin layer of sedimentary rock or sediment in which the planes of stratification are 1 cm or less apart.
A general term for a dark grey, firmly indurated, course-grained sandstone composed of poorly sorted, angular grains of quartz and feldspar with dark colored rocks embedded in fine-grained matrix.
Any particles of minerals or clasts which have been derived from pre-exsting rocks by weathering or erosion.
A hard, dense sedimentary rock composed of monocrystalline silica and characterized by conchoidal fracture.
A course-grained clastic rock composed of angular broken rock and mineral fragments held together by mineral cement or matrix.
Describes a sedimentary rock composed of mainly organic remains that are weakly cemented together.
An unconsolidated deposit of semi-carbonized plant remains in a water saturated environment.
A course-grained feldspar-rich sandstone with a pinkish-red color composed of poorly sorted angular grains.
An individual grain of detrital sedimentary rock or sediment separated from a larger rock mass through weathering and erosion.
A well sorted sand consisting of primarily rounded grains of stable minerals, usually quartz.
The precipitation of minerals into pore spaces in a sediment after deposition.