Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
5/15/95.
(7) Section on road immediately S of Graf on
W side of road. Alg railroad bed has been
Photos-2 B/W 1:10 at f4 Iowa,
Dubuque Co. (see 1962 field notes.)
been
converted to a
covered
gravelled bike path.
10"
12"
8"
1 3/4'
3 1/2'
siltstone)
Dark grey siltstone
Float
Gbl. 5/15/95A
Centricular silt/
rubby bedded siltst
A. Orthocerids
with A
solen corals
siltst
encrusting bryozo.
brachiopods
Shale
3'
with pyritohite B
3+1
Climatograpton ?
Dolorthoceras sociable
From Graf to intersection then east
Robinson
Twin Springs Ch2 - road section on W
side was noted
maybe
CA thinks this is Ten Mbs of Deersah Fm
See hererson & Gerb (1972 p. 113? chart, fig 1)
but ???
> This is lower part of Magnoketa
Fm just above Depauperate Zone
RS