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Re: Dino Demise by Angiosperms

To: tommy.tyrberg@norrkoping.mail.telia.com
Subject: Re: Dino Demise by Angiosperms
From: Daniel Bensen <dbensen@gotnet.net>
Date: Tue, 19 Dec 2000 16:02:07 -0800
Cc: dinosaur@usc.edu
References: <3.0.6.32.20001219210107.00885980@m1.115.telia.com>
Reply-to: dbensen@gotnet.net
Sender: owner-dinosaur@usc.edu

>>(in North America at least) the gymnosperms increase sharply at
the K/T-boundary (first the fern spike and then conifers replace
angiosperms as dominant trees). <<
What was the cause of the spike?  Reaction to a cooler world climate?  Is the
ratio of angiosperms to gymnosperms still at the level it was just after the K/T
extinction, or has the spike in gynosperms gone back down?

Dan

Follow-Ups:
- RE: Dino Demise by Angiosperms
  - From: "Thomas R. Holtz, Jr." <tholtz@geol.umd.edu>

References:
- Re: Dino Demise by Angiosperms
  - From: Tommy Tyrberg <tommy.tyrberg@norrkoping.mail.telia.com>

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