The Grit

 The Sedimentary Rock

The sedimentary rock are formed by chemical and mechanical activities of denudation on pre-existing rocks and which deposited at a particular site. After followed many processes deposition, compaction, cementation and recrystallization of pre-existing rocks converts into a sedimentary rock. example: Shale, Grit, Sandstone, Limestone, Conglomerate, dolomite etc.

The sedimentary rock
Sandstone 

Grit: 

Grit are equivalent to sandstone. It forms when cementation of sand particles having grain size in diameter 2.0 mm to 1/16 mm angular to sub-angular in shape. Grit may be formed by any type of sand like fluviatile sand, marine, desert also. In the sandstone particles hold together by cementing materials like siliceous, calcareous, agrillaceous or ferruginous.

Gritstone

The basic points of grit rock are following:


1) This is a type of clastic sedimentary rock under arenaceous category.

In arenaceous rock have sand grain.


2) Grain size are 2.0mm to 1/16mm


3) Grains shape angular to subangular.

if grain shape sharp rounded then it called sandstone.

Grit mainly composed by quartz, and having small amount of feldspar, garnet, mica etc.