CAS ES 105 Lecture Notes - Lecture 4: San Andreas Fault, Seafloor Spreading, Metastability
30 Jul 2018
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Document Summary
Lithosphere top layer (crust) oceanic and continental. Convection flow of heated material itself (air, water, molten rock) Expand and rises, cools and sinks circle (hot things are more buoyant) Earth is hot bc when we were formed and hit by other things impact heat is still around. Radioactive decay is the other form of heat. Deuterium mass 2 (one pro and one nu) Tritium mass 3 (one pro and two nu) Types of decay alpha beta and electron capture. The molecule is trying to stabilize but it releases heat as it attempts to. Debate of radiogenic decay vs immordial heat for what causes the heat of earth. Uranium and thorium for the majority of heat. Convection currents sometimes break thru the surface and split crust open . Ridge push magma pushes up and drives plates apart. = continental rifting also gulf of cali and red sea. Convergent plate boundries regions where plates push together.
