CAS ES 142 Chapter Notes - Chapter 5-6: List Of Seas, Wave Power, Outer Banks
30 Jul 2018
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Determined by the distribution of major mountain ranges. Example: in south america, the andes is the major drainage divide separate rivers that flow east versus west. Africa: most of africa is in the middle of a plate, little active mountain building, so, no large-scale organization of river drainage. Delivery of sediment is governed by: size of rivers discharging along the coast, cimatic factors, largest sediment river in the world: ganges-brahmaputra. The break up of a continent involves: several plumes of magma rising from the mantle that dome, stretch, and eventually rift apart the overlying lithosphere, this rifting process produces a three-arm tear in the lithosphere. The failed third arm: a low-lying valley, portions of which are below sea level, and extended into the continent (example: east african rift) Two of the rift valleys widen and deepen. In many cases, the fail third arms coincide with sites where the internal damage of a continent empties into the sea.
