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Re: Tuba City, AZ tracks
I just came back from a trip through Arizona, and had stopped by and
checked out the dino tracks outside of Tuba City. Has anyone else been
there? I am curious about what age those tracks have been guessed to be.<
Indeed I have been there. Here's my two bits. These tracks are in the
uppermost Moenave formation, practically on the contact between the Moenave
and the Kayenta. The current thinking is that the Wingate, the Moenave, the
Kayenta and the Navajo are all early Jurassic. However, there has been some
talk about the J-0 unconformity actually being traced to above the Kayenta,
which would put the Moenave, Wingate and Kayenta into the latest Triassic.
There has also been some work done suggesting that the Chinle is lower in
the Triassic than perviously though, which would support a lower position
for the Moenave/Wingate/Kayenta series. Also, there are still mammal-like
reptiles (I know this isn't the cladistically prefered term, but I'll use it
here anyways) found in the Kayenta formation (e.g. _Kayentatherium_), which
would either help support a lower position, or be an odd left-over from the
So, to make a long story short...they're probably Jurassic, but there seems
to be more evidence appearing supporting a lower position.
Thanks if anyone can help!<
Hope this wasn't too confusing, and it helped!
Student of Geology
Northern Arizona University
P.O. Box 20840
Flagstaff, Az. 86011
"A _Coelophysis_ with feathers?"
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