| Lithograph City Formation | |
|---|---|
| Stratigraphic range: Devonian | |
| Type | Formation |
| Unit of | Cedar Valley Group |
| Location | |
| Country | United States |
| Extent | Iowa and Minnesota |
The Lithograph City Formation is a geologic formationinIowa, 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.[1][2]
The formation is named after exposures in the former company town of Lithograph City, where quarries were opened to exploit the high-quality lithographic limestone found in parts of this formation.[3]
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 | This article about a specific stratigraphic formation in Iowa is a stub. You can help Wikipedia by expanding it. |
 | This article related to the Devonian period is a stub. You can help Wikipedia by expanding it. |
