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Deadwood - lower, USA

Formation	Deadwood
Member	lower
Age:	501 - 485 Ma Cambrian
Interval	Cambrian
Tectonic Setting	Cratonic basin
Lithology	shale, "limestone"/sandstone, "limestone", siltstone/"carbonate", "limestone"/siltstone
Number of Collections	50
Number of Occurrences	370

Recorded Sample Locations

Location	Region	Stratigraphic Name
Black Hills	Lawrence County, South Dakota, USA	Deadwood - lower
High School Sample 34 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Moll 38 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Little Elk Creek 48 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Dark Canyon 56 [Deadwood Fm]	Pennington County, South Dakota, USA	Deadwood - lower
Box Elder Creek 54 [Deadwood Fm]	Pennington County, South Dakota, USA	Deadwood - lower
Box Elder Creek 89	Lawrence County, South Dakota, USA	Deadwood - lower
Brownsville Junction 27 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Central City 1 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Deadwood x34 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Englewood x21 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Galena 42 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Open pit 26 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower
Reuter Canyon 1 [Deadwood Fm]	Crook County, Wyoming, USA	Deadwood - lower
Terry 1 [Deadwood Fm]	Lawrence County, South Dakota, USA	Deadwood - lower

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Deadwood	479 - 466 Ma Ordovician	sandstone, "shale", "limestone", "carbonate"/"shale", "limestone"/"shale", "limestone"/sandstone, grainstone/"shale", "shale"/"limestone", "shale"/sandstone, "shale"/siltstone, "limestone"/"siliciclastic", "limestone"/claystone, mudstone	592
Deadwood - middle	501 - 485 Ma Cambrian	limestone	6
Whitewood Limestone	458 - 443 Ma Paleozoic	limestone	11

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Hyolithes sp. genus	6	Animalia : Hyolitha : Hyolithida : Hyolithidae : *Hyolithes*	541 - 485.4 Ma Cambrian
Agnostus sp. genus	6	Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : *Agnostus*	541 - 485.4 Ma Cambrian
Agnostus (Homagnostus) obesus species	7	Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Agnostus : *Agnostus (Homagnostus) obesus*	501 - 485.4 Ma Cambrian
Hadragnostus modestus species	7	Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Hadragnostus : *Hadragnostus modestus*	501 - 485.4 Ma Cambrian
Kormagnostus sp. genus	6	Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : *Kormagnostus*	541 - 485.4 Ma Cambrian
Kormagnostus seclusus species	7	Animalia : Arthropoda : Trilobita : Agnostida : Agnostidae : Kormagnostus : *Kormagnostus seclusus*	501 - 485.4 Ma Cambrian
Nahannagnostus sp. genus	6	Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : *Nahannagnostus*	501 - 485.4 Ma Cambrian
Nahannagnostus nganasanicus species	7	Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : Nahannagnostus : *Nahannagnostus nganasanicus*	501 - 485.4 Ma Cambrian
Pseudagnostina douvillei species	7	Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : Pseudagnostina : *Pseudagnostina douvillei*	501 - 485.4 Ma Cambrian
Pseudagnostus sp. genus	6	Animalia : Arthropoda : Trilobita : Agnostida : Diplagnostidae : *Pseudagnostus*	541 - 485.4 Ma Cambrian
Agnostogonus incognitus species	7	Animalia : Arthropoda : Trilobita : Agnostida : Agnostogonus : *Agnostogonus incognitus*	501 - 485.4 Ma Cambrian
Coosella sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Coosellidae : *Coosella*	541 - 485.4 Ma Cambrian
Coosella prolifica species	7	Animalia : Arthropoda : Trilobita : Agnostida : Anomocaridae : *Coosella prolifica*	501 - 485.4 Ma Cambrian
Coosia sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : *Coosia*	541 - 485.4 Ma Cambrian
Coosia alethes species	7	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : Coosia : *Coosia alethes*	501 - 485.4 Ma Cambrian
Coosina sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : *Coosina*	541 - 485.4 Ma Cambrian
Coosina ariston species	7	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : Coosina : *Coosina ariston*	501 - 485.4 Ma Cambrian
Crepicephalus sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : *Crepicephalus*	541 - 485.4 Ma Cambrian
Meteoraspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Tricrepicephalidae : *Meteoraspis*	541 - 485.4 Ma Cambrian
Meteoraspis metra species	7	Animalia : Arthropoda : Trilobita : Aulacopleurida : Crepicephalidae : Meteoraspis : *Meteoraspis metra*	501 - 485.4 Ma Cambrian
Uncaspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Crepicephalidae : *Uncaspis*	541 - 485.4 Ma Cambrian
Syspacheilus sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : *Syspacheilus*	501 - 485.4 Ma Cambrian
Tricrepicephalus sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Tricrepicephalidae : *Tricrepicephalus*	541 - 485.4 Ma Cambrian
Cheilocephalus sp. genus	6	Animalia : Arthropoda : Trilobita : Corynexochida : Cheilocephalidae : *Cheilocephalus*	501 - 485.4 Ma Cambrian
Arcuolimbus sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Llanoaspididae : *Arcuolimbus*	541 - 485.4 Ma Cambrian
Llanoaspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Llanoaspididae : *Llanoaspis*	501 - 485.4 Ma Cambrian
Aphelaspis sp. genus	6	Animalia : Arthropoda : Trilobita : Asaphida : Aphelaspididae : *Aphelaspis*	501 - 485.4 Ma Cambrian
Blountiella sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Asaphiscidae : *Blountiella*	541 - 485.4 Ma Cambrian
Pemphigaspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Catillicephalidae : *Pemphigaspis*	541 - 485.4 Ma Cambrian
Ankoura sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Kingstoniidae : *Ankoura*	501 - 485.4 Ma Cambrian
Blountia sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Kingstoniidae : *Blountia*	541 - 485.4 Ma Cambrian
Kingstonia sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Kingstoniidae : *Kingstonia*	541 - 485.4 Ma Cambrian
Komaspidella sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Kingstoniidae : *Komaspidella*	501 - 485.4 Ma Cambrian
Komaspidella lata species	7	Animalia : Arthropoda : Trilobita : Ptychopariida : Kingstoniidae : Komaspidella : *Komaspidella lata*	501 - 485.4 Ma Cambrian
Amiaspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Lonchocephalidae : *Amiaspis*	501 - 485.4 Ma Cambrian
Glaphyraspis sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Lonchocephalidae : *Glaphyraspis*	501 - 485.4 Ma Cambrian
Glaphyraspis parva species	7	Animalia : Arthropoda : Trilobita : Ptychopariida : Lonchocephalidae : Glaphyraspis : *Glaphyraspis parva*	501 - 485.4 Ma Cambrian
Terranovella dorsalis species	7	Animalia : Arthropoda : Trilobita : Ptychopariida : Lonchocephalidae : Terranovella : *Terranovella dorsalis*	501 - 485.4 Ma Cambrian
Dresbachia sp. genus	6	Animalia : Arthropoda : Trilobita : Ptychopariida : Menomoniidae : *Dresbachia*	541 - 485.4 Ma Cambrian
Acrotreta sp. genus	6	Animalia : Brachiopoda : Lingulata : Acrotretida : Acrotretidae : *Acrotreta*	541 - 485.4 Ma Cambrian
Dicellomus sp. genus	6	Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : *Dicellomus*	541 - 485.4 Ma Cambrian
Lingulepis sp. genus	6	Animalia : Brachiopoda : Lingulata : Lingulida : Obolidae : *Lingulepis*	541 - 485.4 Ma Cambrian

References

Kulik J. W. (1965) Stratigraphy of the Deadwood Formation Black Hills, South Dakota and Wyoming. MS Thesis South Dakota School of Mines and Technology. Rapid City. Crepicephalus horizon in the Deadwood Formation of South Dakota, Proceedings of the Geological Society of America 1993, 1-99

Stitt J. H., Perfetta P.J. (2000) Trilobites, Biostratigraphy, and Lithostratigraphy of the Crepicephalus and Aphelaspis zones, Lower Deadwood formation (Marjuman and Steptoean Stages, Upper Cambrian), Black Hills, South Dakota, Journal of Paleontology 74 2, 199-223

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!