Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
This interval pitted at intervals.
It is slightly calc - possibly
where it has forums. Besel part
is darker, more calc, grading to
unit below. Top at interval at
glass roots which are held by
concent. of OB weathering coins.
These have calc cores - no fiss, are
small and shatter can weath to
small OB pieces.