Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
6½8 Bentonite + Bentovite shale
31 Gray shale with 1" rusty zone at base Sample 491-C-18
Section continued in next major gully to S, as G-492 - No break - all bentonites below fossil core zone cleaned & they carry them.
94 Gray + dark gray clay shaly
Sample G 492 - #1 Upper 53"
Sample G 492 - #2 Lower 41"
6 to 8 Bentonite.
93 Silty gray shale, intercalated thin platy layered shaly siltstone.
Samples. G-492-#3A upper half
3B lower half
1"± Bentonite (A)
48 Silty shale with internal siltstone
Sample 492-#4
From here to top Dakota section only intermittently exposed. Thicknesses assuming no faulting can be calc from
See Azimuth - N 78 E
Next Distance (horiz) 164'
Page Vertical (slope) 3°
Dip + Strike
On Dakota at base N 7°E, 50 W
On Shale - N 40°E, 2½ E
close to 100°