Maquoketa Formation
| Maquoketa Formation Stratigraphic range: Ordovician | |
|---|---|
| Type | Formation |
| Underlies | Thebes Formation and Wapsipinicon Group |
| Overlies | Cape Formation and Dubuque Formation |
| Thickness | 10 to 100 ft. |
| Lithology | |
| Primary | Shale |
| Other | Limestone |
| Location | |
| Country | United States |
| Extent | Illinois, Minnesota, and Wisconsin |
The Maquoketa Formation is a geologic formation in Illinois,[1] Indiana.[2] Iowa, Kansas,[3] Minnesota,[4] Missouri,[5] and Wisconsin.[6] It preserves mollusk, coral, brachiopod and graptolite fossils[5] dating back to the Ordovician period.
References
- ↑ A comparison of the Maquoketa formation and its fauna in Eastern Wisconsin, Iowa and Illinois (1915), Thesis (M.A.) The University of Illinois
- ↑ Maquoketa Group, Indiana Geological Survey
- ↑ Ordovician in Kansas
- ↑ Maquoketa Formation in Minnesota
- 1 2 The Stratigraphic Succession in Missouri, Missouri Geological Survey, Vol. XL 2nd series, 1961, pp 30-31
- ↑ USGS, Maquoketa Formation
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 22 June 2014.
This article is issued from
Wikipedia.
The text is licensed under Creative Commons - Attribution - Sharealike.
Additional terms may apply for the media files.