Lecture.22

Lecture.22 - Connecticut and Massachusetts in the age of...

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Connecticut and Massachusetts in the age of Dinosaurs
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CT and MA were landlocked during the Late Triassic and Early Jurassic due to the coalescence of Pangaea, which had occurred in the Permian Period library.thinkquest.org/14001/graphics/pangea.gif . Equator
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CT and Ma were about 25º N of the equator at that time, meaning that the temperature was generally hot Being landlocked also meant a seasonal climate; various lines of evidence suggest that the area had a monsoonal climate with a rainy period followed by a dry period library.thinkquest.org/14001/graphics/pangea.gif . Equator
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By the Late Triassic, Pangea began to pull apart due to plate tectonics http://blue.utb.edu/paullgj/physci1417/Lectures/Continental_Rifting.JPG http://www.pbs.org/wgbh/aso/tryit/tectonics/ images/convectioncurrent.gif
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Rifting created a series of normal faults as the land cracked from the tension of being pulled apart http://facweb.bhc.edu/academics/science/harwoodr/Geol101/study/Images/NormalFault.gif
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Large valleys, called rift basins, formed as the hanging walls moved down along the faults relative to the footwalls Rift basins formed all along the eastern seaboard of N. America and also in Africa Van Houten (1977)
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Two of these rift basins, the Hartford Basin and the Deerfield Basin, run north- south through CT and MA The Hartford Basin stretches from Long Island Sound to Amherst, MA The Deerfield Basin stretches from Amherst north to Greenfield There are 3 additional, much
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This note was uploaded on 04/22/2008 for the course GEOL 111 taught by Professor Getty during the Fall '07 term at UConn.

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Lecture.22 - Connecticut and Massachusetts in the age of...

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