GLY 102 Lecture Notes - Lecture 12: Indian Plate, Plate Tectonics, Mesozoic
15 Mar 2018
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Solar forcing (brightness of sun) increases in time. No glaciers or ice sheets & much warmer oceans. Shallow inland sea cut north america in half. There was more co2 in the atmosphere due to volcanic activity. The himalayan mountain range was created 50 myr, when the indian tectonic plate collided with the eurasian tectonic plate. Through erosion, which affects co2 concentrations in the atmosphere. A new mountain range has steep slopes and high erosions. An old mountain has shallower slopes and lower erosion rates. Carbon movement: atmosphere, soil/rock, rivers/streams, oceans, seafloor sediment. Des(cid:272)ri(cid:271)e how (cid:272)he(cid:373)i(cid:272)al weatheri(cid:374)g of ro(cid:272)ks affe(cid:272)ts the earth s (cid:272)li(cid:373)ate. Chemical weathering of rocks moves carbon out of the atmosphere. Chemical weathering of silicate rocks moves carbon out of the atmosphere and into the rock record. Carbon dioxide in the atmosphere dissolves into raindrops, making them slightly acidic. Water carries the ions to the sea, where they precipitate out and become rocks again.
