Question

Sedimentary rocks are usually composed of just one mineral

Answer 1

NO,SEDIMENTARY ROCKS ARE COMPOSED OF MANY MINERALS.

Answer 2

Sedimentary rocks are those which are made up of the collection of sediment transport by the river or by erosion materials.  

Explanation:

• Sedimentary rocks are usually monomineralic that is they are predominantly composed of only one type of mineral. Let's take the example of limestone.  

• It is made of a mineral known as anthracite. Similarly coal is of four types, bituminous, lignite anthracite and coal, all of them consist of different proportions of carbon.

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