| Joachim Dolomite | |
|---|---|
| Stratigraphic range: Ordovician | |
 Joachim Dolomite over St. Peter Sandstone (Pacific, Missouri) | |
| Type | Formation |
| Unit of | Ancell Group |
| Underlies | Pecatonica Formation and Plattin Limestone |
| Overlies | St. Peter Sandstone |
| Thickness | 0 to 100+ feet in Arkansas |
| Lithology | |
| Primary | dolomite |
| Location | |
| Region | Arkansas, Illinois, Missouri |
| Country | United States |
| Type section | |
| Named for | Joachim Creek, Jefferson County, Missouri |
| Named by | Arthur Winslow |
The Joachim Dolomite is a Middle Ordovician geologic formation in Arkansas, Illinois, and Missouri. The name was first introduced in 1894 by Arthur Winslow in his study of the geology of Missouri. Winslow designated a stratotype along Plattin Creek, which was misidentified as Joachim Creek, in Jefferson County. The name was introduced into Arkansas in 1911, replacing part of the, now abandoned, Izard Limestone.
See also
References
- ^ McFarland, John David (2004) . "Stratigraphic summary of Arkansas" (PDF). Arkansas Geological Commission Information Circular. 36: 5. Archived from the original (PDF) on 2016-12-21. Retrieved 2018-01-10.
- ^ Winslow, A. (1894). "Lead and zinc deposits, section 1". Geological Survey of Missouri. 6: 331, 352–353.
- Grohskopf, John G. (1948). "Zones of Plattin-Joachim of eastern Missouri". Bulletin of the American Association of Petroleum Geologists. 332 (3): 351–365.
- Ulrich, E.O. (1911). "Revision of the Paleozoic systems". Bulletin of the Geological Society of America. 22: 281–680.
 | This article about a specific stratigraphic formation in the United States is a stub. You can help Misplaced Pages by expanding it. |