Types of Sedimentary Rocks

Sedimentary rocks are of following types:

1.Clastic Sedimentary rocks:These are sedimentary rocks formed by sedimentation and consolidation of the product of erosion.These are of following types
a)Argillaceous:When chief constituent is clay.e.g. Shale
b)Arenaceous:When chief constituent is sand. e.g.Sandstone
c)Silt rock:When chief constituent is silt. e.g.Siltstane
d)Rudaceous:When particles are of larger size. e.g. Conglomerate

2.Chemically formed sedimentary rock:These are formed chemically
a)Carbonate rock:When chief component is clay. e.g. lomestone .
b)Siliceous rock:When chief component is silica . e.g. flint
c)Ferruginous:When chief component is iron . e.g. some iron deposit.
d)Salt rock:Consist of different types of salts. e.g. Sodium chloride.

3.Organically formed sedimentary rock:These are formed by the agencies of organism. The products are carried by organism.Remaining of dead organism also form this type of rock.This is of following type.
a)Calcareous rock: When chief component is carbonate of Ca, Mg. e.g. limestone.
b)Siliceous rock:When chief component is silica . e.g. diatomaceous earth.
c)Phosphatic rock:When chief component is phosphate. e.g.phosphorite.
d)Ferruginous :When chief component is iron . e.g. some iron deposit.
e)Carbonate rock:When chief component is carbon. e.g. coal deposit.