Tuesday, May 11, 2010

EARLY CARBONIFEROUS

During the Early Carboniferous Pangea Begins to Form.

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During the Early Carboniferous the Paleozoic oceans between Euramerica and Gondwana began to close, forming the Appalachian and Variscan mountains. An ice cap grew at the South Pole as four-legged vertebrates evolved in the coal swamps near the Equator.

More info about the Early Carboniferous

 By the end of the Paleozoic Era,  most of the oceans that had opened during the breakup of Pannotia, were consumed    
 as the continents collided to form the supecontinent of Pangea.  Centered on the Equator, Pangea stretched from the South Pole    
to the North Pole, and separated the Paleo-Tethys Ocean to the east, from the Panthalassic Ocean to the west.    
 During the Late Carboniferous and Early Permian the southern regions of Pangea (southern South America and southern     
Africa, Antarctica, India, southern India, and Australia) were glaciated.  Evidence of a north polar ice cap in eastern Siberia during    
 the Late Permian.    
 The broad Central Pangean mountain range formed an equatorial highland that during late Carboniferous was the locus of     
coal production in an equatorial rainy belt.  By the mid-Permian, the Central Pangean mountain range had moved northward into    
drier climates and the interior of North America and Northern Europe became desert-like as the continued uplift of the mountain    
range blocked moisture-laden equatorial winds.    
 The term "Pangea" means "all land".   Though we call the supercontinent that formed at theend of the Paleozoic Era,    
 "Pangea", this supercontinent probably did not include all the landmasses that existed at that time.  In the eastern hemiphere,     
on either side of the Paleo-Tethys Ocean, there were continents that were separated from the supercontinent.  These continents     
were North and South China, and a long "windshield-wiper"-shaped continent known as Cimmeria.    
 Cimmeria consisted of parts of Turkey, Iran, Afghanistan, Tibet, Indochina and Malaya. It appears to have rifted away from    
 the Indo-Australian margin of Gondwana during the LateCarboniferous - Early Permian.  Together with the Chinese continents,     
Cimmeria moved northwards towards Eurasia, ultimately colliding along the southern margin of Siberia during the late Triassic     
Period.   It was only after the collision of these Asian fragments that all the world's landmasses were joined together in a     
supercontinent deserving of the name "Pangea".   

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