Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
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Transcription
The view on the rather flat top of the
Gray is outlier lining up pretty well
with the reedy beds across the Canyon.
If there is faulting in the upper
portion Geologist's Creek it can't be
very great. I personally believe a
discordance can be explained as slippage
on the whole (clastic) zone carrying
the gray W. side down. This view
is to be the result of a syncline in the
upper Gaptank beds which in turn
and the cave up 26 apparently control the
placement of streams. The Gray is
many meters thin to the west or the
crust may change lithology and add
strata. Between 2 is holzone, paleo will be need to check this. If the
#1 bed g section 1 is gaptank and the
silty sand would fit nicely as the
Udderhol zone. It would seem
from the top of the Gray's outlier
that bed 4 maintains as part
constant interval with bed 5 &
section 5, I would put that at
about 10' to 12' or just about the
displacement of the Little N.S fault.
If the fault up Geologist Canyon is for real, the collection from 7/2/57/11 should be Gaptank; I suspect however it will be found to be Wolfcamp. If it is Gaptank then can be easily explained as a bed truncated by the reedy beds of the #2 gray 1's above and then by the #4 bed g key near the creek bed. At this time it seems significant that the large central part of reeds are contemporaneous and are now on the top of a Gaptank anticline. The Udderhol zone under the outlier suggests it too could be a -anticlinal or at least a high area.
The fossils I found today in the Udderhol zone indicate near shore depositor. The wood in all probably is too common to have been carried very far to sea, the pelecypods are small but a good Camerin type judging by the elongate spiral end of the internal casts. This gonties may suggest normal marine salinity but this point will require further checking.
The question of structural warping of the ls in the outlying keys Gray's