Comet Impacts Triggered Ice Age Extinctions?
John Roach (National Geographic News)
July 21, 2009
http://news.nationalgeographic.com/news/2009/07/090721-comet-ice-age-americans.html
"Rare diamonds found buried on an island near southern California strengthen the controversial idea that comet impacts wiped out huge beasts and an early human culture in North America about 12,900 years ago. "
The proposed theory is that comet impacts occurred 12.900 years ago in North America triggered climate warming there and caused extinctions of local mammals. The comet debris impact created fires and heat that melted the ice sheets and this caused changes in the ocean currents. The changes in ocean currents then caused climate change.
The nanodiamond particles found was a supporting piece of puzzle which indicates that at that time, the impacts did occurred. The nanodiamond was produced from the initial massive heat of the impacts applied to minerals.
The current widely accepted theory is that the ice age ended as a result of changing ocean currents (I recall this is caused by the tectonic movement of continents).
John Roach (National Geographic News)
July 21, 2009
http://news.nationalgeographic.com/news/2009/07/090721-comet-ice-age-americans.html
"Rare diamonds found buried on an island near southern California strengthen the controversial idea that comet impacts wiped out huge beasts and an early human culture in North America about 12,900 years ago. "
The proposed theory is that comet impacts occurred 12.900 years ago in North America triggered climate warming there and caused extinctions of local mammals. The comet debris impact created fires and heat that melted the ice sheets and this caused changes in the ocean currents. The changes in ocean currents then caused climate change.
The nanodiamond particles found was a supporting piece of puzzle which indicates that at that time, the impacts did occurred. The nanodiamond was produced from the initial massive heat of the impacts applied to minerals.
The current widely accepted theory is that the ice age ended as a result of changing ocean currents (I recall this is caused by the tectonic movement of continents).
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