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Del Rio Clay

FormationDel Rio Clay
Age:99.6 - 93.5 Ma
Late/Upper Cretaceous
IntervalEarly Cenomanian
Lithologymarl, claystone
Number of Collections6
Number of Occurrences36

Recorded Sample Locations

LocationRegionStratigraphic Name
Rancho OréganoJiménez Municipality, Coahuila, MexicoDel Rio Clay
Loc. 966 McLennan County, Texas, USADel Rio Clay
Loc. 955 McLennan County, Texas, USADel Rio Clay
Loc. 964 McLennan County, Texas, USADel Rio Clay
San LorenzoAcuna Municipality, Coahuila, MexicoDel Rio Clay
Loc. 951 McLennan County, Texas, USADel Rio Clay

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Buda Limestone93.5 - 66.0 Ma
Late/Upper Cretaceous
limestone, sandstone187
Georgetown99.6 - 93.5 Ma
Late/Upper Cretaceous
4
Pepper Shale99.6 - 93.5 Ma
Late/Upper Cretaceous
shale5

Recorded Fossils

Accepted NameHierarchyAge
Phymosoma sp.
genus
6Animalia : Echinodermata : Echinoidea : Phymosomatoida : Phymosomatidae : Phymosoma99.6 - 93.5 Ma
Late/Upper Cretaceous
Leptarbacia argutus
species
7Animalia : Echinodermata : Echinoidea : Pedinopsids : Leptarbacia : Leptarbacia argutus99.6 - 93.5 Ma
Late/Upper Cretaceous
Hemiaster calvini
species
7Animalia : Echinodermata : Echinoidea : Spatangoida : Hemiasteridae : Hemiaster : Hemiaster calvini99.6 - 93.5 Ma
Late/Upper Cretaceous
Exogyra sp.
genus
6Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Exogyra99.6 - 93.5 Ma
Late/Upper Cretaceous
Gryphaea sp.
genus
6Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Gryphaea99.6 - 93.5 Ma
Late/Upper Cretaceous
Lima sp.
genus
6Animalia : Mollusca : Bivalvia : Limida : Limidae : Lima99.6 - 93.5 Ma
Late/Upper Cretaceous
Pecten (Vola) sp.
subgenus
6.3Animalia : Mollusca : Bivalvia : Pectinida : Pectinidae : Pecten : Pecten (Vola)99.6 - 93.5 Ma
Late/Upper Cretaceous
Graysonites wacoense
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Graysonites : Graysonites wacoense99.6 - 93.5 Ma
Late/Upper Cretaceous
Sciponoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Ammonitida : Baculitidae : Sciponoceras99.6 - 93.5 Ma
Late/Upper Cretaceous
Metengonoceras bravoense
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Engonoceratidae : Metengonoceras : Metengonoceras bravoense99.6 - 93.5 Ma
Late/Upper Cretaceous
Adkinsia bosquensis
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Flickiidae : Adkinsia : Adkinsia bosquensis99.6 - 93.5 Ma
Late/Upper Cretaceous
Stoliczkaia (Lamnayella) texana
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Lyelliceratidae : Stoliczkaiella : Stoliczkaia (Lamnayella) texana99.6 - 93.5 Ma
Late/Upper Cretaceous
Scaphites bosquensis
species
7Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Scaphites : Scaphites bosquensis99.6 - 93.5 Ma
Late/Upper Cretaceous
Yezoites subevolutus
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Scaphitidae : Yezoites : Yezoites subevolutus99.6 - 93.5 Ma
Late/Upper Cretaceous
Tetragonites sp.
genus
6Animalia : Mollusca : Cephalopoda : Tetragonites99.6 - 93.5 Ma
Late/Upper Cretaceous
Mariella (Wintonia) bosquensis
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Turrilitidae : Mariella : Mariella (Wintonia) bosquensis99.6 - 93.5 Ma
Late/Upper Cretaceous
Mariella (Wintonia) brazoensis
species
7Animalia : Mollusca : Cephalopoda : Ammonitida : Turrilitidae : Mariella : Mariella (Wintonia) brazoensis99.6 - 93.5 Ma
Late/Upper Cretaceous

References

Böse E., Cavins O.A. (1927) The Cretaceous and Tertiary of southern Texas and northern Mexico, University of Texas Bulletin 2748, 1-142
Böse E. (1928) Cretaceous ammonites from Texas and northern Mexico, University of Texas Bulletin 2748 2 - 1927, 143-357
Kennedy W. J., Cobban W. A., et al (2005) Upper Albian and Lower Cenomanian ammonites from the Main Street Limestone, Grayson Marl and Del Rio Clay in northeast Texas, Cretaceous Research 26, 349-428
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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