Is Granite A Clastic Sedimentary Rock

Clastic sedimentary rocks like sandstone form from clasts or pieces of other rock.

Is granite a clastic sedimentary rock. 6 1 clastic sedimentary rocks a clast is a fragment of rock or mineral ranging in size from less than a micron 1 too small to see to as big as an apartment block. Clastic sedimentary rocks are composed of other rock fragments that were cemented by silicate minerals. A clast is a fragment of geological detritus chunks and smaller grains of rock broken off other rocks by physical weathering. The spaces between the large angular fragments are filled with a matrix of smaller particles and a mineral cement that binds the rock together.

Sedimentary rocks form as a result of weathering and deposition from previously formed rocks and are usually much softer than igneous or metamorphic rocks. The formation of clastic and organic rocks begins with the weathering or breaking down. The granite melts into lava then cools becoming igneous. Breccia is a term most often used for clastic sedimentary rocks that are composed of large angular fragments over two millimeters in diameter.

Clastic rocks are composed of fragments or clasts of pre existing minerals and rock. Granite is an intrusive igneous rock formed from the cooling and solidifying of felsic magma at depth within the earth s crust. Deep marine deposits are wedge shaped deposits consisting of coarse sediments and a large amount of feldspar typically at the foot of an eroding mountain range whereas deposits consist mostly of. The smaller ones tend to be composed of a single mineral crystal and the larger ones are typically composed of pieces of rock.

The sedimentary rock becomes metamorphic with heat and pressure. In general the greater the distance traveled the smaller and more rounded the sediment particles will be. 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. Organic sedimentary rocks like coal form from hard biological materials like plants shells and bones that are compressed into rock.

Clastic sedimentary rocks are classified according to the grain size of the sediment and the kinds of rock fragments that make up the sediment table grain size is largely a function of the distance the particle was transported. It erodes into sediment and then gets compressed into a sedimentary rock. Any type of mineral may be present but they in general represent the minerals that exist locally. It forms due to crystallization from magma.

Clastic rocks are composed largely of quartz feldspar rock lithic fragments clay minerals and mica. One easy way to. Clastic sedimentary rocks are subdivided according to the dominant particle size. Various types of clasts are shown in figure 5 12 and in exercise 5 3.