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Wilcox Group, Texas (Guadeloupe County) finds and mysteries
KingsburyFossilHunter posted a topic in Fossil ID
Hi everyone! For the last few months I have been finding lots of fossil imprints in mixed chert cobble on a artist residency/farm in Kingsbury, Texas near Seguin (in Guadeloupe county). They are digging up some of the cobble/gravel to line the roads and walkways on the farm, which means that everything gets spread out nicely! Plus there is the 'quarry' itself. The USGS map says that the area is Wilcox Group, undivided, and/or Willis Formation, and I am looking at mudstone, chert, a little bit of sandstone, gravel, some petrified wood. In terms of age I think it matches up with Eocene but could go back a little farther, especially since some stuff may have been deposited by a nearby creek. For Wilcox Group USGS says AGE_MINPhanerozoic - Cenozoic - Tertiary-Paleogene - Early-Eocene AGE_MAXPhanerozoic - Cenozoic - Tertiary-Paleogene - Late-Paleocene. I am using the two classic Texas references to ID general fossil type, Matthew's Texas Fossils and also Finsley's A Field Guide to Fossils of Texas, and also deeply perusing thefossilforum.com site. I think the below is a stromatolite, then the rest are pelecypod impressions of various types. Except for that last photo in this post, I am guessing that is just a sideways cross section. I am curious as to your opinions... it has been really fun to look and to find these! I will add more images in subsequent posts.