Clastic Sediment
Related content
- Agglomerate
- Amphibole
- Arkose
- Avalanches
- Basalt
- Bed load
- Boring (earth)
- Boulder
- Breccia
- Chemical
- Clastic rock
- Clay
- Claystone
- Cobble (geology)
- Colluvium
- Conglomerate (geology)
- Debris flow
- Diagenesis
- Epidote
- Epithermal
- Erosion
- Eutaxitic
- Fault (geology)
- Graben
- Granite
- Gravel
- Greisen
- Groundmass
- Hydraulic fracture
- Hydrofracture
- Hydrothermal
- Igneous rocks
- Impact crater
- Intrusion
- Lava
- Lithic fragment (geology)
- Lithic sandstone
- Matrix (geology)
- Metamorphic rocks
- Metasomatism
- Meteorite
- Mineral
- Minerals
- Montana
- Mudrock
- Mylonite
- Ore
- Osmiridium
- Particle size
- Particle size (grain size)
- Plagioclase
- Polarized
- Pseudotachylite
- Pyroclastic
- Pyroxene
- Quartz arenite
- Sand
- Sandstone
- Scoria
- Sediment
- Sediment transport
- Sedimentary depositional environment
- Sedimentary exhalative deposits
- Sedimentary rock
- Shale
- Shatter cone
- Silt
- Siltstone
- Skarn
- Spherulite
- Suspension (chemistry)
- Taxitic
- Tektite
- Thin section
- Tuff
- Turbidite
- Udden-Wentworth grain size chart
- Vesicular texture
- Volcanic rock
- Weathering
- Wiktionary
- Wiktionary clast
Clastic rock
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock fragments. Geologists use the term clastic with reference to sedimentary rocks as well as to particles in sediment transport whether in suspension or as bed load, and in sediment deposits.
Clastic metamorphic rocks include breccias formed in faults, as well as some protomylonite and pseudotachylite. Occasionally, metamorphic rocks can be brecciated via hydrothermal fluids, forming a hydrofracture breccia.
Clastic igneous rocks include pyroclastic volcanic rocks such as tuff, agglomerate and intrusive breccias, as well as some marginal eutaxitic and taxitic intrusive morphologies. Igneous clastic rocks are broken by flow, injection or explosive disruption of solid or semi-solid igneous rocks or lavas.
Clastic sedimentary rocks are rocks composed predominantly of broken pieces or clasts of older weathered and eroded rocks. Clastic sediments or sedimentary rocks are classified based on grain size, clast and cementing material (matrix) composition, and texture. The classification factors are often useful in determining a sample's environment of deposition. An example clastic environment would be a river system in which the full range of grains being transported by the moving water consist of pieces eroded from solid rock upstream.
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