384-386 Studies on the Molluscan Paleofauna of the Texas Paleogene

Studies on the Molluscan Paleomacrofauna of the Texas Paleogene - BAP #384-386 Investigation of known Seguin localities led to the discovery of an overlooked diverse and abundant marine fauna in Solomon's Branch, a stream in Bastrop County, Texas. The fauna, a transported assemblage from a marine littoral environment, encompasses a mix of specimen types from large wave-worn individuals to the smallest unworn ornamented species. Following the discovery of this fauna, further field work was undertaken and other Seguin localities with different depositional environments were found and collections made from those sites. Finally, a further suite of specimens was examined within the Texas Natural Science Center, some from localities no longer in existence or now lost. The environment is transitional in character from the deeper water Midway to the nonmarine environment of the chiefly terrestrial Texas Wilcox deposits, and represents the last major marine transgression in this area prior