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Past Changes in Physical Geography /Past Changes in Physical Geography /Plate TectonicsPlate Tectonics
I. Continental Drift Early theory (Taylor 1908, Wegener 1910) Opposition
II. Resurgence of C.D. as Plate Tectonics III. Current Model and Processes
Midoceanic ridges - spreading Ocean trenches -- subduction
IV. Geographic Changes Gondwana, Euramerica and Siberia Gondwana and LaurasiaPangeaSplit Again
VI. Early Life Marine Dinosaurs Mammals K/T boundary Flowering Plants
Past Changes in Past Changes in Physical Geography /Physical Geography /Plate TectonicsPlate Tectonics
Dr. B. Holzman
Barriers
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geologic Time ScaleGeologic Time Scale
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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A revolutionary ideaA revolutionary ideafrom a meteorologistfrom a meteorologist
"Utter, damned rot!" said the president of the prestigious "Utter, damned rot!" said the president of the prestigious American Philosophical Society. American Philosophical Society. "If we are to believe [this] hypothesis, we must forget "If we are to believe [this] hypothesis, we must forget everything we have learned in the last 70 years and start all everything we have learned in the last 70 years and start all over again," said another American scientist. over again," said another American scientist. Anyone who "valued his reputation for scientific sanity" would Anyone who "valued his reputation for scientific sanity" would never dare support such a theory, said a British geologist. never dare support such a theory, said a British geologist.
Continental DriftBy Alfred Wegener
325 MYA
50 MYA
4-2 MYA
Doesn't the east coast of South America fit exactly against the west coast of Africa, as if they had once been joined?" wrote Wegener to his future wife in December 1910. "This is an idea I'll have to pursue."
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
4
Continental Drift
Land bridges ???
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Tectonics
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Divergent plates: volcanos, new earth
Convergent plates : volcano and mtn building
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
8
The earth through timeThe earth through time
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
11
Diplovertebron - a medium-sized semi-aquatic tetrapod length 1 to 1.5 metresMoscovian of Europe
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Ceolophysis dinosaurs within a conifer forest
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Marsupials move north-south
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
15
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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500-270 MYA
245 MYA-present
Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006
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Geog 316 Fall 2006 SFSU Dr. B.A. Holzman
For the exclusive use of students enrolled in GEOG 316 Fall 2006