Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Partial section of basal Benton at Rustler mine.
Top of Dztotz transition zone
7.0 Shale - mostly obscured, upper - 2.7 feet
is DK gray to black, hard silty shale.
0.2 layer argill., siltstone at top. [Sample 1]
0.4 Flint-like clay, saapy, like gray, may be bentonitic. [Sample 1A]
0.5 Argillaceous siltstone, ferruginous.
1.8 Shale, gray to dark gray, blocky, silty
in lower half with some silt laminae,
and thin beds. [Sample 2]
0.2 Argill. siltstone with shale partings,
Fe saturated.
3.2 DKgray to black shale, locally finely
silty in bottom 1.2. [Sample 3]
0.4 Brown ferroginous layer silt?
3.0 DKgray to black Shale [Sample 4]
7.6+ Shale as above with Scz Hard
concretions Fe stone, Festone. Layers come in below
some concretione. Layers come in below
1.0.
lower 2.3 = [Sample 5], next 2.3 Sample #6
Reminder of Section slumped or disscarted.