Viewing page 472 of 473

This transcription has been completed. Contact us with corrections.

0858
Check up on posterior

June 17
Left Ann Arbor about 8:30 A M, reached Ingersoll about 3:30 P.M. First quarry just NW of Ontario Hy 2 about 2 miles NE of Ingersoll, Quarry of Chemical Lime Co. Here are about 50 - 90 feet of Detroit River (probably Lucas & possibly some Amherstburg In wells under the Lucas comes cherty beds of Amphigenia zone of Lower Onondaga. The cherty zone under the Lucas is probably thicker than where it outcrops.

The Lucas is overlain by Columbus with Paraspirifer, very wide-lineged Spinifers (macrus?) many Conocardium, good typical Colombus limestone. About 15' of Columbus occurs at this quarry. Almost in the city of Ingersoll a well shows 45' of the cap rock (Columbus) This could be partly Dundee or Delaware.

In a quarry just SW of RR station at Innerkip is a defunct quarry with Silurian in lower part and with cherty Onondaga about 10' on top. Here are many corals and a few brachiopods including Amphigenia. This is lowest Onondaga according to Dr. Ehlers and belongs under the Detroit River of the Ingersoll Quarry.