| Hopkinton Dolomite | |
|---|---|
| Stratigraphic range: Silurian | |
| Type | Formation |
| Location | |
| Region | Iowa |
| Country | United States |
The Hopkinton Dolomite is a geologic formation in Iowa. It preserves fossils dating back to the Silurian period.
The Chouteau Limestone is a geologic formation in Illinois, Iowa, Kansas, and Missouri. It preserves fossils dating back to the Carboniferous period.
The Keokuk Limestone is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian sub-period.
The Warsaw Formation is a geologic formation in Illinois, Iowa and Missouri. It preserves fossils dating back to the Mississippian subperiod.
The Burlington Limestone is a geologic formation in Missouri, Iowa and the Midwest region. It preserves fossils dating back to the Mississippian subperiod.
The Shawnee Group is a geologic group in Iowa. It preserves fossils dating back to the Carboniferous period.
The Hampton Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.
The Pella Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.
The Kanwaka Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.
The St. Louis Formation is a geologic formation in Iowa. It preserves fossils dating back to the Carboniferous period.
The Coralville Formation is a geologic formation in Iowa. It preserves fossils dating back to the Devonian period.
The Linwood Formation is a geologic formation in Iowa. It preserves fossils dating back to the Devonian period.
The Lithograph City Formation is a geologic formation in Iowa, part of the Cedar Valley Group. It preserves fossils dating back to the Devonian period. The formation is composed of dolomite and limestone, with many fossils and vugs in the lower part, while the upper part contains few fossils.
The Lime Creek Formation is a geologic formation in Iowa. It preserves fossils dating back to the Devonian period.
The Spillville Formation is a geologic formation in Iowa and southeastern Minnesota. It preserves fossils dating back to the Devonian period.
The Cedar Valley Formation is a geologic formation in Iowa. It preserves fossils dating back to the Devonian period. No type locality has ever been designated for this formation, but it is best known for limestone and dolomite exposures in and around Johnson County, Iowa. The formation is exposed in numerous road cuts, quarries and valley walls over much of north-east and north-central Iowa.
The Hackberry Group is a geologic formation in Iowa. It preserves fossils dating back to the Devonian period.
The Stewartville Formation is a geologic formation in Iowa. It preserves fossils dating back to the Ordovician period.
The Cummingsville Formation is a geologic formation in Iowa and Minnesota. It preserves fossils dating back to the Ordovician period.
The Blanding Formation is a geologic formation in Iowa. It preserves fossils dating back to the Silurian period.
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