Re: [asa] YEC--What can we offer them?

From: David Campbell <pleuronaia@gmail.com>
Date: Fri Jul 06 2007 - 13:43:00 EDT

> It seems that a certain sub-continent were very slooooow

Probably the accent made it hard for folks over here to get your drift.

The oroginal continental drift had the continents plowing through the
seafloor, which doesn't work. Recognizing that the seafloor is made
of moving plates, too was an important step.

Also, Wegener got a bit carried away on the amount of stuff that could
be explained. Although there have been some extremely important
events for determining global climate and for creating or severing
particular connections, overall the relative placement of continents
has been grossly similar since the late Mesozoic. Thus, in general
the distribution of organisms that have significantly dispersed or
radiated during the Cenozoic has a decent match with current geography
(especially if you allow some rise and fall of sea level or land
connections). As the youngest time interval, it's also better
preserved and documented. It's not surprising that consideration of
Cenozoic mammal distribution did not make the 1947 Encyclopaedia
Britannica authors too keen on continental drift, though they
considered it worth discussing.

-- 
Dr. David Campbell
425 Scientific Collections
University of Alabama
"I think of my happy condition, surrounded by acres of clams"
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Received on Fri Jul 6 13:43:29 2007

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