[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index][Subject Index][Author Index]

Re: Quo vadis J-K extinctions? (was RE: Big Craters)

In a message dated 11/24/99 2:04:34 PM EST, tholtz@geol.umd.edu writes:

<< Sure, there's something worth looking into IF AND WHEN PEOPLE FIND A
 TERRESTRIAL J-K SEQUENCE (with vertebrate fossils)!>>

Was going to make just this point, then got into a different thread.
<< The Morrison dinosaurs are Kimmeridigian, or maybe earliest Tithonian.  The
 Lakota Formation, Yellow Cat Member of Cedar Mountain Fm, and good Wealden
 Group dinosaur assemblages are Barremian.
 We are missing good assemblages from the Tithonian (latest Jurassic),
 Berriasian, Valaginian, and Hauterivian dinosaur assemblages: over 20
 million years of dinosaurs! >>

Maybe J-K impact obliterated all latest Jurassic dinosaur-bearing strata 
(just kidding, JUST KIDDING!).