Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
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Transcription
AIN-51-28
(5) Altitude on upper ss N. 18 W, 48° E.
(6)-(6b) Abandoned headings.
(7) Open heading
(8) Pocket of clay of local extent mined here
(9) Excellent exposure of clay complex
with little beds, main and split all
exposed.
Section from base massive x-lam Dakota
down to top 1st Glen ss.
19.4 - Zone of thin clay beds, were highly
variable & consisting of interb.
dk gray to bluish, silty sh, and
beds strength fine gr, loc, argill.
km, weth, ss. Lent, ss up
to 4't from 0.2.
Main bed
3.3 Silty dk gray clay some