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Maquoketa - Fort Atkinson, USA

Group	Maquoketa
Formation	Fort Atkinson
Member(s)	Upper
Age:	450 - 444 Ma Paleozoic
Interval	Richmondian
Lithology	shale/wackestone, dolomite, grainstone
Number of Collections	6
Number of Occurrences	17

Recorded Sample Locations

Location	Region	Stratigraphic Name
Roadcut near Turkey Creek on south side of county highway east of Fort Atkinson	Winneshiek County, Iowa, USA	Maquoketa - Fort Atkinson - Upper
Maquoketa Group	Sauk County, Wisconsin, USA	Maquoketa - Fort Atkinson
Maquoketa Group	St. Clair County, Illinois, USA	Maquoketa - Fort Atkinson
Unit 8	Manitowoc County, Wisconsin, USA	Maquoketa - Fort Atkinson
Kankakee River	Kankakee County, Illinois, USA	Maquoketa - Fort Atkinson
Porocrinus pentagonius-Carabocrinus Association of the Wise Lake Formation at Bu	Winneshiek County, Iowa, USA	Maquoketa - Fort Atkinson
Three quarters of a mile southwest of Ossian	Allamakee County, Iowa, USA	Maquoketa - Fort Atkinson

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Wise Lake - Sinsinawa	452 - 450 Ma Late/Upper Ordovician	wackestone	16
Maquoketa - Fort Atkinson - Upper	450 - 444 Ma Paleozoic	grainstone	19

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Plaesiomys sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : *Plaesiomys*	449.5 - 443.7 Ma Paleozoic
Plaesiomys bellistriatus species	7	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Plaesiomys : *Plaesiomys bellistriatus*	449.5 - 443.7 Ma Paleozoic
Hypsiptycha sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : *Hypsiptycha*	449.5 - 443.7 Ma Paleozoic
Lepidocyclus sp. genus	6	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : *Lepidocyclus*	449.5 - 443.7 Ma Paleozoic
Strophomenida order	4	Animalia : Brachiopoda : Strophomenata : Strophomenida	449.5 - 443.7 Ma Paleozoic
Megamyonia sp. genus	6	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : *Megamyonia*	449.5 - 443.7 Ma Paleozoic
Megamyonia knighti species	7	Animalia : Brachiopoda : Strophomenata : Strophomenida : Rafinesquinidae : Megamyonia : *Megamyonia knighti*	449.5 - 443.7 Ma Paleozoic
Oepikina sp. genus	6	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : *Oepikina*	449.5 - 443.7 Ma Paleozoic
Cryptostomata order	4	Animalia : Bryozoa : Stenolaemata : Cryptostomata	449.5 - 443.7 Ma Paleozoic
Trepostomatida order	4	Animalia : Bryozoa : Stenolaemata : Trepostomatida	449.5 - 443.7 Ma Paleozoic
Foerstephyllum sp. genus	6	Animalia : Cnidaria : Anthozoa : Favositidae : *Foerstephyllum*	449.5 - 443.7 Ma Paleozoic
Bighornia sp. genus	6	Animalia : Cnidaria : Anthozoa : Streptelasmatidae : *Bighornia*	449.5 - 443.7 Ma Paleozoic
Streptelasma sp. genus	6	Animalia : Cnidaria : Anthozoa : Streptelasmatidae : *Streptelasma*	449.5 - 443.7 Ma Paleozoic
Hudsonaster sp. genus	6	Animalia : Echinodermata : Asteroidea : Hudsonasteridae : *Hudsonaster*	449.5 - 443.7 Ma Paleozoic
Crinoidea class	3	Animalia : Echinodermata : Crinoidea	449.5 - 443.7 Ma Paleozoic
Calceocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Calceocrinidae : *Calceocrinus*	449.5 - 443.7 Ma Paleozoic
Dendrocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Dendrocrinidae : *Dendrocrinus*	449.5 - 443.7 Ma Paleozoic
Archaeocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : *Archaeocrinus*	449.5 - 443.7 Ma Paleozoic
Trichinocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Rhodocrinitidae : *Trichinocrinus*	449.5 - 443.7 Ma Paleozoic
Ectenocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Homocrinidae : *Ectenocrinus*	449.5 - 443.7 Ma Paleozoic
Sygcaulocrinus typus species	7	Animalia : Echinodermata : Crinoidea : Homocrinidae : Sygcaulocrinus : *Sygcaulocrinus typus*	449.5 - 443.7 Ma Paleozoic
Iocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Iocrinidae : *Iocrinus*	449.5 - 443.7 Ma Paleozoic
Cupulocrinus latibrachiatus species	7	Animalia : Echinodermata : Crinoidea : Cupulocrinidae : Cupulocrinus : *Cupulocrinus latibrachiatus*	449.5 - 443.7 Ma Paleozoic
Carabocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Carabocrinidae : *Carabocrinus*	449.5 - 443.7 Ma Paleozoic
Porocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : *Porocrinus*	449.5 - 443.7 Ma Paleozoic
Protaxocrinus sp. genus	6	Animalia : Echinodermata : Crinoidea : Taxocrinidae : *Protaxocrinus*	449.5 - 443.7 Ma Paleozoic
Cyclocystoides sp. genus	6	Animalia : Echinodermata : Cyclocystoidea : Cyclocystoididae : *Cyclocystoides*	449.5 - 443.7 Ma Paleozoic
Bothriocidaris sp. genus	6	Animalia : Echinodermata : Echinoidea : Bothriocidaridae : *Bothriocidaris*	449.5 - 443.7 Ma Paleozoic
Astrocystites sp. genus	6	Animalia : Echinodermata : Edrioasteroidea : Pentacystida : Steganoblastidae : *Astrocystites*	449.5 - 443.7 Ma Paleozoic
Pleurocystites sp. genus	6	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : *Pleurocystites*	449.5 - 443.7 Ma Paleozoic
Pleurocystites beckeri species	7	Animalia : Echinodermata : Rhombifera : Pleurocystitidae : Pleurocystites : *Pleurocystites beckeri*	449.5 - 443.7 Ma Paleozoic
Iowacystis sp. genus	6	Animalia : Echinodermata : Soluta : Syringocrinida : Iowacystidae : *Iowacystis*	449.5 - 443.7 Ma Paleozoic

References

Wang Y. (1949) Maquoketa Brachiopoda of Iowa, Geological Society of America Memoir 42, 1-55

Parsley R. L. (1970) Revision of the North American Pleurocystitidae (Rhombifera-Cystoidea), Bulletins of American Paleontology 58, 135-213

Sivon P. A. (1980) Stratigraphy and paleontology of the Maquoketa Group (Upper Ordovician) at Wequiock Creek, Eastern Wisconsin, Milwaukee Public Museum Contributions in Biology and Geology 35, 1-45

Elias R. J. (1983) Late Ordovician solitary rugose corals of the Stony Mountain Formation, southern Manitoba, and its equivalents, Journal of Paleontology 57 5, 924-956

Frest T. J., Brett C. E., et al (1999) Caradocian-Gedinnian echinoderm associations of Central and Eastern North America, Paleocommunities--a case study from the Silurian and Lower Devonian, 638-783

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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