Figure A-16. Photomicrographs of thin-sections from core samples from Trenton and Black River formations in Sun Buss-Haab No. 1, 8-3S-4E.

A. 4035 ft--Crinoidal packstone (Trenton). Large ossicle in right half. PPL.

B. 4144 ft--Skeletal packstone (Trenton). Small bryozoan fragments and brachiopod debris are abundant. PPL.

C. 4539 ft--Highly stylolitized dolomite wackestone (Black River). Coarser dolomite stands out as lighter in color on the right side. PPL.