Posted: Aug 09, 2011 6:18 am
These references are relevant for the discussion of the meteor impact 65 million years ago...
Some discussion of the theories, and why none are accepted as fact yet...
http://www.ucmp.berkeley.edu/diapsids/extinctheory.html
And an image showing soil layers of material from several points in NE Mexico leading up to the KT boundary...
http://geoweb.princeton.edu/people/keller/fig13.jpg
It seems like all elements (in a certain portion of ejecta) were totally vaporized, to condense into droplets of solid matter.
They spread out towards the NNW overtime, but well behind the clay and plants destroyed, mixed, and displaced some distance from the impact. On top of all this mixed plant-mud, there is the solidified droplets (higher the further you go from the gulf), and on top of all that there is the sandstone. Sand forms under clay (with the gravel) when rivers dry up.
The water would have formed quite a spectacular tsunami of mud, which would form a crater like shape far larger than the present crater. Of course, it would have eroded quickly, and then the Ferns took advantage and flourished after.
There may be enough evidence now to prove it absolutely, or has it been and this Berkeley page is just not up to date?
Some discussion of the theories, and why none are accepted as fact yet...
http://www.ucmp.berkeley.edu/diapsids/extinctheory.html
And an image showing soil layers of material from several points in NE Mexico leading up to the KT boundary...
http://geoweb.princeton.edu/people/keller/fig13.jpg
It seems like all elements (in a certain portion of ejecta) were totally vaporized, to condense into droplets of solid matter.
They spread out towards the NNW overtime, but well behind the clay and plants destroyed, mixed, and displaced some distance from the impact. On top of all this mixed plant-mud, there is the solidified droplets (higher the further you go from the gulf), and on top of all that there is the sandstone. Sand forms under clay (with the gravel) when rivers dry up.
The water would have formed quite a spectacular tsunami of mud, which would form a crater like shape far larger than the present crater. Of course, it would have eroded quickly, and then the Ferns took advantage and flourished after.
There may be enough evidence now to prove it absolutely, or has it been and this Berkeley page is just not up to date?