Grainstone composed almost exclusively of Parafavreina, a fecal pellet made by burrowing shrimp. This deposit is almost identical to modern accumulations of fecal pellets made by related burrowing-shrimp.This thin section was stained with Alizarin red S, staining calcite pink. White particles are quartz silt grains.. Light pink areas are calcite cement crystals filling original open spaces among the pellets. Jurassic Smackover Formation, Alabama, image 2.5 mm wide.
The photos of Parafavreina that I have been posting were taken in the process of preparing this scientific article:
Rindsberg,
A. K., and Kopaska-Merkel, D. C., 2013 , Parafavreina
ziczac isp.
nov., a crustacean microcoprolite from the Upper Jurassic (Oxfordian)
Smackover Formation of Alabama, U.S.A., Alabama Museum of Natural
History Bulletin 31, v. 2. p. 74-93.
I have PDF copies of the article if anyone is interested.
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