The Geology of Texas - Vol. 1 - pages 444

This sand, first called by Veatch (1691, p. 25) "sub-Clarksville" sand from wells near Clarksville, was named Blossom by Gordon (609, p. 19), who correlated it with the sandy upper portion of the Eagle Ford at Sherman. The type locality is at Blossom, eastern Lamar County. 

The upper part of the Bonham clay about halfway between Ector and Randolph, southwestern Fannin County, is calcareous and chalky and eastwards is distinctly glauconitic; this develops into brown, sandy, ferruginous glauconitic beds interlaminated with thin clay beds, outcropping as a sandy belt several miles wide. The Blossom outcrop passes eastward across central Fannin, Lamar and Red River counties, through Paris, Blossom, Detroit and Bagwell, and ending at the edge of Red River valley near the mouth of Pecan Bayou.

Stephenson states that the fossils from the Blossom indicate the equivalence of the Blossom with the upper part, perhaps the upper half, of the type Austin near Austin. At least 11 species are common to the type Austin, and the following indicate synchronicity with the upper part of the type Austin: Inoceramus aff. /. deformis Meek, Ostrea congesta Conrad, Ostrea aff. 0. diluviana Linne, Gryphaea aucella Roemer, Exogyra ponderosa Roemer, Liopistha elegantula (Roemer)?, and Baculites asper Morton. No Eagle Ford species were found. The cephalopoda listed are: Nautilus sp., "Hamites" sp., Baculites asper Morton, Placenticeras sp., and Prionotropis?.