Chalk is a biochemical sedimentary rock.
None of the above. Marble is a metamorphic rock.
Biochemical sedimentary rocks: limestone, coal, chalk. Evaporative chemical sedimentary rocks: rock salt, gypsum.
Limestone is chemical; though in certain cases, limestone may be organic, when it is composed of the dead remains of organisms (fossils). That's called fossiliferous limestone, or fossil-rich limestone, but regular limestone is just chemical.
The basic division of sedimentary rocks is into clastic and chemical rocks. Clastic rocks are formed when grains form a sediment and are then cemented together, as happens with sandstone or shale. Chemical rocks form when solid precipitates out of solution, for instance when calcium carbonate is formed from sea water to give chalk.
Clastic rocks are sedimentary rocks consisting of bits and pieces of other rocks created by physical/mechanical weathering. Non-clastic are also sedimentary rocks; however are absent bits and pieces of other rocks and are formed through chemical processes (e.g. hydrolysis, evaporation, precipitation, oxidation) or form out of organic material (e.g. coal, chalk).
None of the above. Marble is a metamorphic rock.
Biochemical sedimentary rocks: limestone, coal, chalk. Evaporative chemical sedimentary rocks: rock salt, gypsum.
It is clastic
Limestone is chemical; though in certain cases, limestone may be organic, when it is composed of the dead remains of organisms (fossils). That's called fossiliferous limestone, or fossil-rich limestone, but regular limestone is just chemical.
Chemical: Minerals were dissolved in water to form it. Organic: Formed from the remains of living things. Clastic: Formed form bits of other rocks.
Clastic and nonclastic
The basic division of sedimentary rocks is into clastic and chemical rocks. Clastic rocks are formed when grains form a sediment and are then cemented together, as happens with sandstone or shale. Chemical rocks form when solid precipitates out of solution, for instance when calcium carbonate is formed from sea water to give chalk.
Limestone and chalk are formed from organic material Limestone - Clastic shell fragments Chalk - Microscopic shells of calicum carbonate plates formed by single celled algaes Chert - Microscopic siliceous organisms, recrystallized silica
Clastic, chemical, and Organic
Clastic rocks are sedimentary rocks consisting of bits and pieces of other rocks created by physical/mechanical weathering. Non-clastic are also sedimentary rocks; however are absent bits and pieces of other rocks and are formed through chemical processes (e.g. hydrolysis, evaporation, precipitation, oxidation) or form out of organic material (e.g. coal, chalk).
Clastic (or detrital): Sedimentary rock formed from particles of other sedimentary, metamorphic, or igneous rock which has been weathered, eroded, deposited, compacted and cemented. Examples of clastic sedimentary rock include shale, sandstone, mudstone, and conglomerate.Chemical: Chemical sedimentary rocks have intergrown mineral crystals that are precipitated from saturated aqueous solutions and chemical residues. The precipitated minerals that are commonly included are halite, quartz, limonite, calcite, chert, dolomite, hematite, and gypsum; consequently, common chemical rocks are limestone, chert, and rock gypsum.Organic:Organic sedimentary rock is rock that is derived or generated from sediments that are produced by organisms. Coal and chalk are examples of organic sedimentary rock.
No. Chalk is a variant of limestone, composed primarily of calcite. It is a carbonate sedimentary rock. Shale is a laminated sedimentary rock composed of silt and clay sized particles of mostly silicate mainerals. It is a clastic sedimentary rock.