GEOL 106 Lecture Notes - Lecture 2: Hawaiian Islands, Lystrosaurus, Mid-Ocean Ridge
23 Mar 2018
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Document Summary
Intense geologic activity is concentrated at plate boundaries, where plates move away, toward or past each other: theory born in late 1960s by combining hypotheses of continental drift and seafloor spreading. Where does internal heat come from: formation of solar system, 4,600 million years ago, decay of radioactive elements, uranium, main wave heat is brought to the surface of the earth is by convection in the mantle. Radioactive decay: radioactive atom gives off waves towards energy and particles and radiation in the middle of energy and particle. Fossil evidence: paleo climatic evidence, rock type and structural similarities, continental fit, more realistic approach is to fit the continents together along the continental slope. Similarities between continents was noted by early proponents of the theory of continental drift: fossil evidence, glassopteris: seeds too large to be carried by wind, and unlikely to remain visible if carried in salt water.
