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Galena - Spechts Ferry, USA

Group	Galena
Formation	Spechts Ferry
Age:	461 - 450 Ma Ordovician
Interval	Rocklandian
Lithology	limestone, "shale"
Number of Collections	2
Number of Occurrences	58

Recorded Sample Locations

Location	Region	Stratigraphic Name
Guttenberg Formation	Carroll County, Illinois, USA	Galena - Spechts Ferry
Spechts Ferry Formation Ostracodes of Iowa	Boone County, Iowa, USA	Galena - Spechts Ferry

Associated Units

Stratigraphic Name	Age	Lithology	Occurrence Records
Galena - Dubuque	461 - 450 Ma Ordovician	limestone, wackestone	68
Galena - Dunleith - Beecher	461 - 450 Ma Ordovician	limestone	194
Galena - Dunleith - Eagle Point	461 - 450 Ma Ordovician	limestone	198
Galena - Dunleith - Fairplay	461 - 450 Ma Ordovician	shale/"limestone"	146
Galena - Dunleith - Mortimer	461 - 450 Ma Ordovician	limestone	156
Galena - Dunleith - Rivoli	461 - 450 Ma Ordovician	limestone	151
Galena - Guttenberg	461 - 450 Ma Ordovician	limestone, "limestone"/"shale"	204
Galena - Ion - Buckhorn	461 - 450 Ma Ordovician	limestone	203
Galena - Ion - St. James	461 - 450 Ma Ordovician	shale	180
Galena - Wise Lake - Rifle Hill	461 - 450 Ma Ordovician	dolomite	65
Maquoketa - Brainard Shale	450 - 444 Ma Paleozoic	shale	43
Maquoketa - Fort Atkinson Limestone	452 - 450 Ma Late/Upper Ordovician	dolomite, "limestone"	41
Maquoketa - Scales Shale - Clermont	452 - 450 Ma Late/Upper Ordovician	limestone, "shale"	111
Maquoketa - Scales Shale - Elgin	450 - 444 Ma Paleozoic	limestone, wackestone	157
Platteville - Grand Detour	461 - 450 Ma Ordovician	limestone	28
Platteville - Mifflin	461 - 450 Ma Ordovician	limestone, wackestone	20
Platteville - Pecatonica	461 - 450 Ma Ordovician	limestone	13
Platteville - Quimbys Mill	461 - 450 Ma Ordovician	limestone	24

Recorded Fossils

Accepted Name	Type	Hierarchy	Age
Primitiella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiidae : *Primitiella*	460.9 - 449.5 Ma Ordovician
Primitiella constricta species	7	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiidae : Primitiella : *Primitiella constricta*	460.9 - 449.5 Ma Ordovician
Halliella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Beyrichiidae : *Halliella*	460.9 - 449.5 Ma Ordovician
Bollia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Bolliidae : *Bollia*	460.9 - 449.5 Ma Ordovician
Maratia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Bolliidae : *Maratia*	460.9 - 449.5 Ma Ordovician
Aparchites sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Aparchitidae : *Aparchites*	460.9 - 449.5 Ma Ordovician
Bassleratia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Bassleratia*	460.9 - 449.5 Ma Ordovician
Bellornatia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Bellornatia*	460.9 - 449.5 Ma Ordovician
Bromidella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Tvaerenellidae : *Bromidella*	460.9 - 449.5 Ma Ordovician
Bullatella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Bullatella*	460.9 - 449.5 Ma Ordovician
Byrsolopsina sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Byrsolopsina*	460.9 - 449.5 Ma Ordovician
Ceratopsis sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Quadrijugatoridae : *Ceratopsis*	460.9 - 449.5 Ma Ordovician
Cryptophyllus sp. genus	6	Animalia : Arthropoda : Ostracoda : Cryptophyllidae : *Cryptophyllus*	460.9 - 449.5 Ma Ordovician
Dicranella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Tvaerenellidae : *Dicranella*	460.9 - 449.5 Ma Ordovician
Euprimitia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiidae : *Euprimitia*	460.9 - 449.5 Ma Ordovician
Eurychilina sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiidae : *Eurychilina*	460.9 - 449.5 Ma Ordovician
Hallatia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiidae : *Hallatia*	460.9 - 449.5 Ma Ordovician
Hesperidella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Hesperidella*	460.9 - 449.5 Ma Ordovician
Laccoprimitia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Laccoprimitia*	460.9 - 449.5 Ma Ordovician
Leperditella sp. genus	6	Animalia : Arthropoda : Ostracoda : Leperditiidae : *Leperditella*	460.9 - 449.5 Ma Ordovician
Parabolbina sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Hollinidae : *Parabolbina*	460.9 - 449.5 Ma Ordovician
Paraschmidtella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Paraschmidtella*	460.9 - 449.5 Ma Ordovician
Pedomphalella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Pedomphalella*	460.9 - 449.5 Ma Ordovician
Primitiopsis sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Primitiopsidae : *Primitiopsis*	460.9 - 449.5 Ma Ordovician
Saccelatia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Aparchitidae : *Saccelatia*	460.9 - 449.5 Ma Ordovician
Schmidtella sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Schmidtella*	460.9 - 449.5 Ma Ordovician
Thomasatia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : *Thomasatia*	460.9 - 449.5 Ma Ordovician
Winchellatia sp. genus	6	Animalia : Arthropoda : Ostracoda : Palaeocopida : Tetradellidae : *Winchellatia*	460.9 - 449.5 Ma Ordovician
Krausella sp. genus	6	Animalia : Arthropoda : Ostracoda : Krausellidae : *Krausella*	460.9 - 449.5 Ma Ordovician
Bythocypris sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Bythocyprididae : *Bythocypris*	460.9 - 449.5 Ma Ordovician
Bairdiocypris sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : Bairdiocyprididae : *Bairdiocypris*	460.9 - 449.5 Ma Ordovician
Punctaparchites sp. genus	6	Animalia : Arthropoda : Ostracoda : Podocopida : *Punctaparchites*	460.9 - 449.5 Ma Ordovician
Isotelus gigas species	7	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : *Isotelus gigas*	460.9 - 449.5 Ma Ordovician
Isotelus walcotti species	7	Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : *Isotelus walcotti*	460.9 - 449.5 Ma Ordovician
Ceraurus sp. genus	6	Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : *Ceraurus*	460.9 - 449.5 Ma Ordovician
Eomonorachus intermedius species	7	Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Eomonorachus : *Eomonorachus intermedius*	460.9 - 449.5 Ma Ordovician

References

DeMott L. L. (1987) Platteville and Decorah Trilobites from Illinois and Wisconsin, Middle and Late Ordovician lithostratigraphy and biostratigraphy of the Upper Mississippi Valley: Minnesota Geological Survey Report of Investigations 35

Swain F. M. (1987) Middle and Upper Ordovician Ostracoda of Minnesota and Iowa, Minnesota Geological Survey Report of Investigations 35, 99-101

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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