Anhydrite replacing limestone and filling fracture in Smackover Formation, south Alabama. Thin section photomicrograph. Image about 1 mm across.
Light-colored dolomite, which partially replaced red-stained limestone, is being in turn replaced by limestone. Smackover Formation, south Alabama. Thin section photomicrograph. Image about 1 mm across.
Wormy-looking sponge in the upper part of image, Smackover Formation, south Alabama Slabbed and polished core. Core 4 inches wide.
