61.
In which type of rocks are metals like gold and copper mostly found?

62.
The breaking up of the rocks at its place is known as

63.
In due course of time the meander loop cuts off from the river and forms a cutoff lake, also called an ________ lake.

64.
The material carried by the glacier such as rocks big and small, sand and silt gets deposited, which are called glacial ________.

65.
Carbonaceous rocks which produce coal and of belong to the category of rocks called

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