Derby-Doerun Dolomite | |
Type: | Formation |
Age: | Upper Cambrian |
Period: | Cambrian |
Prilithology: | Dolomite |
Region: | St. Francois County, Missouri |
Country: | United States |
Unitof: | Elvins Group |
Underlies: | Potosi Dolomite |
Overlies: | Davis Formation |
The Derby-Doerun Dolomite is a Cambrian geologic formation exposed in southeast Missouri. Originally the Derby and Doerun were originally considered separate formations, but now considered a single unit.[1] The combined name is from the Derby Mine and the Doe Run Lead Company of the Old Lead Belt.[1]