EOS 120 Study Guide - Midterm Guide: Mid-Ocean Ridge, Continental Drift, Ridge-And-Valley Appalachians
20 Feb 2017
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Document Summary
Solar energy is a big deal! makes up 99. 85% of the earths incoming external heat. Radioactive decay is a signi cant internal heating factor. Our core is still cooling from formation (internal) order of formation: gas> dust> grains> rocks> asteroids> planets. (evidence in meteorites and the asteroid belt) Earth is unique due to h20 cycle, life, internal heat and convection. Sources of internal heat: residual from gravitational contraction & asteroid impacts. Use drill holes into rock or probes into sediment. Alfred wegner was the 1st dude. wasn"t accepted at the time,due to lack of driving force for continents to move. died disappointed. fossils evidence for hypothesis: t of continents. Identical fossils found on diff continents: glacial deposits. Glaciers migrate over land leaving striae (scratches) and deposits behind, on places that are now in the equatorial region and are much too hot to have glaciers on them: mountain belts age and structural trend.
