Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
SECTION #2 (Loc. 74) NW¼, NW¼, SW¼, sec. 33,
on SW side of liginitic-shale-capped spur trending
SE from Hell Cr. bluff in cent., E edge sec. 32.
Starting at top of the sandy zone with
scattered white conc. ss masses (unit 7
of section #1. This is a very persistent
unit in the local bedlands and about the
best datum for control of rapid lateral
changes in "Colgate" and Hell Creek above. Local
fossil accumulation at top = sample 1. (6011 74*3)
(1) 15.3 Interbed. silty shale, silt and sand.
lower 2 to 3 ft more shale and
with this gray popcorn bench over
underlying sandy unit. Above this
it is rather veg., thin bedded with
silt and sh. pred. over sand. Whole
markedly bedded
(2) 10.0 Sand, with very beds shaly sand
with cub frags, with this to crumbly
or popcorn slope. Much of
sand is slightly clayey, a
"Colgate" type = subgraywacka,
mostly vfq.
(3) 16.6 Sand, friable, gray vfq+fq, with
shaly carbonaceous interbeds, some
lignitic lamine. Blobs jvosite and
limonitic weather zones that weather
to thin OB chips. Some local
indurated x lem. lenses - some
with plant frags. Unit weather to lite
gray weakly fluted slope.
Some layers Corbicula assoc with
Fe layers or in sand near them. Also
numerous Odd button-like cones.
Some otoliths too-