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Chispa Summit, Texas, USA

Formation	Chispa Summit
Age:	93.5 - 89.3 Ma Late/Upper Cretaceous
Interval	Early Turonian
Lithology	limestone, marl
Number of Collections	10
Number of Occurrences	32

Recorded Sample Locations

Location	Region	Stratigraphic Name
Stone Ranch	Hudspeth County, Texas, USA	Chispa Summit
USGS Loc. 22608	Dallas County, Texas, USA	Chispa Summit
USGS Loc. D11186	Jeff Davis County, Texas, USA	Chispa Summit
USGS Mesozoic D10946	Hudspeth County, Texas, USA	Chispa Summit
Chispa Summit	Jeff Davis County, Texas, USA	Chispa Summit
USGS Mesozoic D10898	Jeff Davis County, Texas, USA	Chispa Summit
USGS Mesozoic D10750	Jeff Davis County, Texas, USA	Chispa Summit
USGS Mesozoic D10751	Jeff Davis County, Texas, USA	Chispa Summit

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Buda Limestone	93.5 - 66.0 Ma Late/Upper Cretaceous	limestone, sandstone	187

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Mytiloides sp. genus	6	Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : *Mytiloides*	93.5 - 89.3 Ma Late/Upper Cretaceous
Euomphaloceras septemseriatum species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Euomphaloceras : *Euomphaloceras septemseriatum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Kamerunoceras calvertense species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Kamerunoceras : *Kamerunoceras calvertense*	93.5 - 89.3 Ma Late/Upper Cretaceous
Kamerunoceras eschii species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Kamerunoceras : *Kamerunoceras eschii*	99.6 - 93.5 Ma Late/Upper Cretaceous
Mammites powelli species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Mammites : *Mammites powelli*	93.5 - 89.3 Ma Late/Upper Cretaceous
Metoicoceras geslinianum species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Metoicoceras : *Metoicoceras geslinianum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Neocardioceras juddii species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Neocardioceras : *Neocardioceras juddii*	99.6 - 93.5 Ma Late/Upper Cretaceous
Pseudaspidoceras sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : *Pseudaspidoceras*	99.6 - 93.5 Ma Late/Upper Cretaceous
Pseudocalycoceras angolaense species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Pseudocalycoceras : *Pseudocalycoceras angolaense*	99.6 - 93.5 Ma Late/Upper Cretaceous
Quitmaniceras reaseri species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Quitmaniceras : *Quitmaniceras reaseri*	93.5 - 89.3 Ma Late/Upper Cretaceous
Rhamphidoceras saxatilis species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Rhamphidoceras : *Rhamphidoceras saxatilis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Spathites coahuilaensis species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Spathites : *Spathites coahuilaensis*	93.5 - 89.3 Ma Late/Upper Cretaceous
Tarrantoceras sellardsi species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Tarrantoceras : *Tarrantoceras sellardsi*	99.6 - 93.5 Ma Late/Upper Cretaceous
Thomelites sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : *Thomelites*	99.6 - 93.5 Ma Late/Upper Cretaceous
Allocrioceras larvatum species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Anisoceratidae : Allocrioceras : *Allocrioceras larvatum*	93.5 - 89.3 Ma Late/Upper Cretaceous
Sciponoceras gracile species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Baculitidae : Sciponoceras : *Sciponoceras gracile*	99.6 - 93.5 Ma Late/Upper Cretaceous
Collignoniceras woollgari species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Collignoniceratidae : Collignoniceras : *Collignoniceras woollgari*	93.5 - 89.3 Ma Late/Upper Cretaceous
Prionocyclites mite species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Collignoniceratidae : Prionocyclites : *Prionocyclites mite*	93.5 - 89.3 Ma Late/Upper Cretaceous
Prionocyclus albinus species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Collignoniceratidae : Prionocyclus : *Prionocyclus albinus*	93.5 - 89.3 Ma Late/Upper Cretaceous
Prionocyclus hyatti species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Collignoniceratidae : Prionocyclus : *Prionocyclus hyatti*	93.5 - 89.3 Ma Late/Upper Cretaceous
Wrightoceras munieri species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Pseudotissotidae : Wrightoceras : *Wrightoceras munieri*	93.5 - 89.3 Ma Late/Upper Cretaceous
Thomasites adkinsi species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Thomasites : *Thomasites adkinsi*	93.5 - 89.3 Ma Late/Upper Cretaceous
Worthoceras sp. genus	6	Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : *Worthoceras*	99.6 - 93.5 Ma Late/Upper Cretaceous
Fagesia catinus species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Vascoceratidae : Fagesia : *Fagesia catinus*	93.5 - 89.3 Ma Late/Upper Cretaceous
Vascoceras cauvini species	7	Animalia : Mollusca : Cephalopoda : Ammonitida : Vascoceratidae : Vascoceras : *Vascoceras cauvini*	99.6 - 93.5 Ma Late/Upper Cretaceous
Vascoceras proprium species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Vascoceratidae : Vascoceras : *Vascoceras proprium*	93.5 - 89.3 Ma Late/Upper Cretaceous
Vascoceras silvanense species	7	Animalia : Mollusca : Cephalopoda : Ammonoidea : Vascoceratidae : Vascoceras : *Vascoceras silvanense*	99.6 - 93.5 Ma Late/Upper Cretaceous

References

Cobban W. A. (1988) Tarrantoceras Stephenson and related ammonoid genera from Cenomanian (Upper Cretaceous) rocks in Texas and the western interior of the United States, United States Geological Survey Professional Paper 1473, 1-30

Cobban W. A. (1988) The Late Cretaceous ammonite Spathites Kummel & Decker in New Mexico and Trans-Pecos Texas, New Mexico Bureau of Mines & Mineral Resources Bulletin 114, 5-21

Kennedy W. J., Cobban W. A. (1990) Rhamphidoceras saxatilis n. gen. and sp., a micromorph ammonite from the lower Turonian of Trans-Pecos Texas, Journal of Paleontology 64 4, 666-668

Kennedy W. J., Cobban W. A., et al (2001) A revision of the Turonian members of the ammonite subfamily Collignoniceratinae from the United States Western Interior and Gulf Coast, Bulletin of the American Museum of Natural History 267, 1-148

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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