41.
When almost all the elevated portions are worn down by river erosion reducing an area to almost a plain region, it is termed as

42.
India broke away from Australia and Antarctica and started moving north in the period of ________

43.
Nappe is a kind of

44.
Sandstone is which type of rock?

45.
Decaying vegetation produces organic acids which causes a breakdown of minerals. This is ________

46.
Which of the following are Metamorphic rocks?

47.
Which of the following is a metamorphic rock?

48.
Which one of the following is a Sedimentary Rock?

49.
Changing of colour of a rock into yellow or red is due to

50.
Which of the statements is/are correct?
1. Igneous rocks are classified into Extrusive and Intrusive rocks.
2. Sedimentary rocks are also called as Primary rocks
3. Marble is an example of Metamorphic rocks
4. Coal is a sedimentary rock

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