Answer: Option [C]‘Cirques’ are land forms of third order.
Third order landforms : Deltas, Fjords coasts, Sand dimes, Beaches, Valleys, Cirques, Mushroom rocks, Limestone rocks.
The glacier erodes the steep side walls of the mountain and farms bowl shaped arm chair. It is termed as cirque.
Answer: Option [C]The ‘convection current hypothesis’ is related to Origin of earth. The hypothesis of convection currents suggests that flow in the mantle is induced by currents which drag and move the lithospheric plates above the asthenosphere. Convection currents rise and spread below divergent plate boundaries and converge and descend along convergent.
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Answer: Option [A]Running water is the chief agent of the formation of Sedimentary rocks. Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation.
Answer: Option [D]The correct sequence is Taconian, Caledonian, Armonican, Varicon.
Answer: Option [C]‘Step Fault’ occurs when the crust is broken into several parallel.
