Image from the Biodiversity Heritage Library.
Contributed by Yale Peabody Museum of Natural History.
| www.biodiversitylibrary.org
Transcription
Saturday June 11-1910
Dunham
Rained hard all morning.
In the afternoon visited the eastern quarries from
Barnie's in the south to the Drip quarry at the north.
Collected in the upper five feet of the Transition Series
to the Creymans having Sphinctula solcata (go through the
13 foot) In these five feet got L. alve, L. crunucensis,
Tc sycacanthus, Phtherodonta variistriata, the small
Alphichonella described by Barham, Plocdenia and
Plocdenella pennsylvanica, Beyartmia.
It seems to me that these are the beds or about the
beds in which I collected the crinoids at Litchfield.
In the quarries just east of the village and a little
north of the cemetery one sees the following succession:
Creymans a cattle thin layered heavy textured grey
limestone that does not weather into clumps on the beds.
The 12 feet of dark blue to black marl a less irregular
trilobed limestone holding at the top the fossils mentioned above.
Then the Tataraculite series or Charlevoix. At the top 30 and
thick, followed by 7 feet (in 3 layers) that will weather into thin
beds, then 8 feet of beds in 4 to 6 inch layers followed by one foot
of this plate clots abounding in Tetraculites. Then a heavy bed,
3 feet thick followed by a dark clayey layer also from the
mud on the base of the quarry, about 3/10" thick