In old Igneous type of rocks metals like gold and copper mostly found. Gold and copper are found in ore bodies associated with porphry. Porphry is a general term applied to igneous rocks of any composition that contain conspicuous phenocrysts (crystals) in a fine-grained groundmass.
The breaking up of the rocks at its place is known as
Weathering describes the breaking down or dissolving of rocks and minerals on the surface of the Earth. Water, ice, acids, salts, plants, animals, and changes in temperature are all agents of weathering.
In due course of time the meander loop cuts off from the river and forms a cutoff lake, also called an ________ lake.
An oxbow lake is formed by both erosional and deposition actions of a river. In lower course a river dominates in lateral erosion and bend is created by it. On outer end of bend erosion dominates and on inner end deposition dominates and finally a loop is separated known as oxbow lake.
The material carried by the glacier such as rocks big and small, sand and silt gets deposited, which are called glacial ________.
Carbonaceous rocks which produce coal and of belong to the category of rocks called Sedimentary rocks. Carbonaceous rocks are a type of the sedimentary rocks formed by the deposition of sea plants which remained buried for a long period of time.