Wildlife sanctuaries in Assam

 

SEDIMENTARY ROCKS

Agate—A semiprecious chert of infinite variety.
Alabaster—A white gypsum stone long prized for sculpture.
Arkose—A raw sandstone made from eroded granite.
Asphalt—Natural, from a natural oil seep.
Banded Iron Formation—Extremely ancient "tiger iron."
Breccia—Rock made from broken rocks, breccia has many forms.
Chert—A common siliceous rock type with much variety.
Coal—The original fossil fuel.
Conglomerate—Rocks made with extra-big grains.
Coquina—A limestone made from shell fragments.
Diamictite—Rock made of poorly sorted land sediment.
Dolomite—An altered near-twin of limestone.
Graywacke—An impure sandstone also called wacke.
Gypsum Rock—A crusty chunk from a Nevada roadside.
Limestone—The greatest carbon-bearing rock.
Peat—Brown, vegetative precursor to coal.
Rock Salt—The only edible stone.
Sandstone—Where sand goes to and comes from.
Shale—Rock made from mud and clay.
Siltstone—Made from sediment finer than sand.
Travertine—A form of limestone created in springs