Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
bed of hard silty claystone 1ft from top which
includes hard white, [illegible], porcelanite-like
layers. 3 ft from top is .1 layer silty
white weathering (pounding) bentonite? like light
tea-gray clay.
4.2
Siltstone, fine grained, irreg bedded
silty, brownish gray silt/brac laminae; packs
dense, beds .1 to 1.0, weatherous to irreg
to sterner surface, locally resistant,
obscur[illegible]