031020c

Microcoprolites made by callianassid shrimp, Parafavreina ziczac, Jurassic Smackover Formation, south Alabama, thin-section photomicrographs, some of which are stained with Alizarin red S, which stains calcite pink, but does not stain dolomite. Samples from between 2 and 3 miles below the surface

Pellet grainstone within thrombolite, well 2769, 12,306.3 feet, 2.5 mm wide

Pellet packstone, well 1571, 14,688 feet, 2.5 mm wide

 
Pellet packstone, well 10,255, 13,457 feet, 2.5 mm wide



Pellet in mixed particle grainstone, pellet containing burrow in lower right (circular area), well 5432, 12,935 feet, 1 mm wide

 
Intraclast containing pellet in partially dolomitized mixed particle grainstone, well 3988 14,432 feet, 1 mm wide.

 Pellets in partially dolomitized mixed particle grainstone, well 4557, 12,820.5 feet, 2.5 mm wide.

 Partially dolomitized pellet packstone in which some pellets are preferentially dolomitized, well 1903, 11,770.9 feet.2 .5 mm wide

Pelmoldic pellet packstone (pores filled with light blue to very dark blue epoxy), well 1878, 11,789 feet, 2.5 mm wide.