![cover image](https://wikiwandv2-19431.kxcdn.com/_next/image?url=https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/St_Peters_Sandstone_Pacific_MO_5-med.jpg/640px-St_Peters_Sandstone_Pacific_MO_5-med.jpg&w=640&q=50)
Joachim Dolomite
From Wikipedia, the free encyclopedia
The Joachim Dolomite is a Middle Ordovician geologic formation in Arkansas, Illinois, and Missouri.[1] The name was first introduced in 1894 by Arthur Winslow in his study of the geology of Missouri.[2] Winslow designated a stratotype along Plattin Creek, which was misidentified as Joachim Creek, in Jefferson County.[3] The name was introduced into Arkansas in 1911, replacing part of the, now abandoned, Izard Limestone.[4]
Quick Facts Type, Unit of ...
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[1] |
Lithology | |
Primary | dolomite |
Location | |
Region | Arkansas, Illinois, Missouri |
Country | United States |
Type section | |
Named for | Joachim Creek, Jefferson County, Missouri |
Named by | Arthur Winslow[2] |
Close