Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
July 8 - Monday.
Intended to take the 7.30 A.M. train for
Washington Junction but by a curious mistake
saw the train go with Reds but Adkine and
I were left. Later Reds showed me his
material. Contact between the Cambrian and
Tassie he did not see but a short distance
south of the supposed contact he came on the
Petroae conglomeratic marble.
This conglomerate is made up of irregular
sized, and more rounded limestone pebbles
bound together by a ferric cement. The
pebbles vary from the size of sand grains up to
those twice as large as a human head.
This ore cements zone is followed by one
of a sandy nature in which limestone pebbles
are also found but here they are not held
so firmly and weather out. Further east
occurs generally red but also variegated beds
of a sandy nature in which the grains are
but more rounded or well assorted. Further
than is found (Reds found it in its place)
slate with cuticle tubes reminding some of
Archthyceus and less of Coleothus.
The entire material is derived close at