GEO 110 Lecture Notes - Lecture 4: Continental Crust, Continental Drift, Gabbro

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5 Aug 2016
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Sun radiation comes in, in the form of light wave and some IR are trapped in the
atmosphere
The radiation goes up and down when the northern hemisphere tilts towards and away
from the sun. Each the the hemispheres tilts towards the sun and then alternates
The higher the CO, higher the temperature
Ocean absorbs the sun more than the ice resulting in a faster built up of heat
Infectious diseases expanding and emerging as warm temperature increases
Four Low line areas likely to be flooded Netherlands, florida, bangladish, new orleans
Type of ice thickness that will make it easy for the submarine to come out:
Results of global warming are relocation and precipitation
Lecture 4
Crust:
oThinnest and Outermost
oInner core is made up of two minerals which are iron and nickel
oHas a temperature of 6000 degrees
Mantle:
oLargest volume of air
oIs 2000km long
Asthenosphere:
o400-1300km
oWeak layer
oVery fluid because of higher temperatures
Lithosphere
oZone of rock
o60-400km
Two major crust: ocean and continental
Continental crust:
oOcean and continental are in constant collision
oContinental crust is made up of silica and aluminum
oA lot of ferrous materials in the continental crust
oRelatively warmer and lighter than the ocean crust
oContinental crust has a greater viscosity
Oceanic Crust:
oDenser and cooler
oMarfic material
oHas very low viscosity
oMinerals found are gabbro basalt
Alfred Wegener:
oSaid Continental is moving
oThe society disapproved his theory
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