by hot magma
Non-clastic means not formed from other rocks or rock particles.Non-clastic or chemical rock, is composed of chemical precipitate out of solution.Clastic rock is formed from particles of other rock.
Fragments of preexisting rocks.
Non-clastic rocks are formed through chemical and organic processes. Chemical rocks like limestone are formed when minerals in water precipitate out and accumulate. Organic rocks like coal are formed from the remains of plants and animals that are buried and compacted over time. These processes occur without the transportation and deposition of sediments like in clastic rocks.
Clastic Sedimentary Rocks.
Clastic: These rocks are composed predominantly of broken pieces of older weathered and eroded rocks Non-clastic/ Organic: A sedimentary rock composed of the remains of plants and animals.
Clastic sediments are sediments that have particles or pieces of rock (clasts) in them. The clasts can be of igneous, metamorphic or sedimentary rock. Non-clastic sediments are made up of dissolved minerals or organic matter.
Clastic rocks are composed of broken pieces of older rocks that have been broken up by the process of weathering and are therefore sedimentary in nature. The "clasts" (bits of older rock) may vary in size.
Clastic and organic sedimentary rocks like conglomerate, coal, some limestones, and shale, are formed under pressure from overlying sediments.
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 Sedimentary Rock- Sedimnetary rocks formed from fragments of rocks cemented together by minerals such as calcite.Chemical Sedimentary Rock- Sedimentary rocks formed from a solution of minerals (such as halite) and water.Organice Sedimentary Rocks- Sedimentary Rocks formed from the remaints of dead sea animals and seashells.
Clastic rocks are formed when a piece of a larger rock is broken off. Physical weathering is usually the way the piece is broken off.
Clastic or detrital rocks, depending on size.