Question One [20 Marks]
(a) Briefly explain on the discontinuities encountered within the Earth. Comment on their significance. [5]
(b) Explain the genesis of the Earth's magnetism. Include comments on palcomagnetism. [7]
(c) Discuss magmatism in relation to plate margins. [8] Question Two
(a) The development of mantle plumes is linked to mantle evolution. With examples, explain the evidence of the intrusion of mantle plumes on Earth's lithosphere. [5]
(b) Clearly explain the difference between passive and active rifts. [3]
(c) With examples, describe the concept of supercontinent cycles. [12] Question Three
(a) How are fine grained terrigenous sediments used in the estimation of the Earth's upper crustal composition. [5]
