Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
5.
Section of Dakota & Glencely (pzt) in Nameless
Draw N 15° W, 45° SE
From top of massive unit down (does not include
thin shale & ss at top.)
A 33.4 Sandstone, beddy, even-bedded x-lgm fine gr.
locally friable, weaths yellow brown gray.
Lower 4.0 has clay-pellet cal.
B 3.9 Obscured, probably aquilla siltst & ss, a
'clay' zone.
C 4.6 Sandstone, massive, dense fine grained
brown-weath ss, upper surface ripple
marked.
D 5.4 Argillaceous blue-gray weath siltstone,
and probably silty clay, but obscured
by slope wash. Locally 1' good bl. clay. Only clay
E 15.5 Sandstone, massive to even bedded
cross-lgm. fine gr. weaths yellowish brown
to gray
F 3.5 Slope wash obscures weak zone.
Argillaceous siltstone in flat.
G 13.0 Sandstone, massive to even bedded
cross-lgm. fine gr. weaths yellowish
to gray
H 4.0 Obscured weak zone, sands float,
some aquilla siltst.
I 34.0 Sandstone, massive to even-bedded
x lgm, fine to med. gr near base
with local basal zone coarse to
coptic with clay pellets also.
brown-weath.
J. 6.0 slabby siltstone & fine ss w/til
interbedded silty shale & shaly
siltstone. Breakdown
1.0 Dk gray silty sh.
2.5 Pizty siltst & ss
1.0 Shaly siltys, minor sh.
1.5 Pizky siltst.