Authors: Karunakar Marasakatla
Life on Earth reels under the Supercontinent cycles. Every Supercontinent forms with the collision and merger of all the plates causing a "tectonic pause". Reduced seafloor spreading and albedo advances the ice sheets towards the equator. Massive ice sheets cover the ocean and whole or part of the Supercontinent causing a global ice age or snowball Earth event. Base of the continents further sinks into the mantle with the increased weight of the ice sheets. Increased pressure within the mantle forms as a superplume under the Supercontinent and eventually breaks the Supercontinental crust giving the new plates. Superplume with the increased seafloor spreading and the albedo causes a severe global warming and rapidly melts the ice sheets, exiting the global ice age. Rapid melting of the ice sheets floods the lowered continental regions. Isostacy gradually uplifts the submerged continental crust above the sea level. Each break in the crust causes a global warming and merger of plates causes an ice age. Mass extinctions occur in the ice age and global warming periods. Evolution takes place in the post global warming period. Ice ages and global warming forms the distinct boundaries in the sedimentary layers.
Comments: 16 pages
[v1] 29 August 2010
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