Re: TRICERATOPS AND PSITTACOSAURUS ARE NOT OVERSPLIT

[Marilyn Wegweiser <mdwegweiser@bsuvc.bsu.edu>]

At 9:28 AM -0500 3/7/01, Danvarner@aol.com wrote:
> In a message dated 3/7/01 12:01:21 AM Pacific Standard Time,
> Tetanurae@aol.com writes:
>
> << T. horridus and T. prorsus do overlap somewhat temporally, but there are
>  periods where the only Triceratops kind in existence was the T. horridus
>  kind.>>
>
>      Is there now enough resolution to Hell Creek/Lance straitigraphy across
> the large area in which it is exposed to make such a statement? I remember
> the difficulties encountered by trying to divide the North Dakota Hell Creek
> into members. This was a while back, however...

Depends on which state you are in. You can try to follow me up and 
down the vertical column between the Meeteetse and the Lance in 
northern Wyoming this summer if you care to.

I've got the contacts between the Teapot/Meeteetse and the 
Meeteetse/Lance pretty well nailed. I measured the Meeteetse 
allostratigraphically meter by meter last summer. This summer, I am 
going in for a closer look.

I can't speak for definitively separating the Hell Creek/Lance yet 
allostratigrpahically, and I'd have to make a strafing run in to 
Montana to really do that well. I have time. There are a number of 
people interested in that strata. I'm making a higher resolution 
"longhorn." The progress report is in press (AAPG); the paper 
discussing the initial research is in progress (along with at least 6 
others).

Cheers,
Marilyn