Question

How do minerals occur?

Answer 1

They are usually formed when minerals in liquid/molten and gaseous forms are forced upwards through cavities towards the earth's surface. ... In these rocks, minerals occur in beds or layers. Coal, iron ore, gypsum, potash salt and sodium salt are the minerals found in sedimentary rocks.

Answer 2

(1) IGNEOUS AND METAMORPHIC ROCKS : Minerals occurs in cracks. When they are inside the earth they are in liquid form but due to heat it comes on the surface and become solid. LIKE : COPPER.

(2) SEDIMENTARY ROCKS : Minerals occurs in layers due to deposition , accumulation and concentration. LIKE : COAL.

(3) RESIDUE MASS : In this , Minerals occurs during to decomposition of surface rock. LIKE : BAUXITE .

(4) PLACER DEPOSITS : Minerals occurs in valley and don't corrod with water. LIKE : GOLD , SILVER.

(5) DECCAN BEDS : Some Minerals like SALT , MAGNESIUM are obtained from it.

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