CBSE Class 9 Answered
what do we mean by igneous and metamorphic rocks ?
Asked by atul | 18 Jun, 2018, 08:21: PM
Expert Answer
The igneous rocks are also known as primary rocks as they form the basis of formation of other types of rocks. Igneous rocks are formed due to cooling, solidification and crystallization of molten material known as magma. Igneous rocks mainly consist of the alumino-silicate minerals like quartz and feldspar.
Metamorphic rocks: When existing rocks are subjected to high temperature and pressure, metamorphic rocks are formed.
Answered by Social Science Expert | 19 Jun, 2018, 02:24: PM
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