The Naco Formation is a geologic formation in Arizona. It preserves fossils dating back to the Pennsylvanian subperiod.
Naco Formation | |
---|---|
Stratigraphic range: Pennsylvanian | |
Type | Formation |
Lithology | |
Primary | Limestone |
Other | Shale, siltstone |
Location | |
Region | Arizona |
Country | United States |
Fossils from the Kohls Ranch locality of Gila County, Arizona, include bivalve and gastropod molluscs, brachiopods, bryozoans, crinoids, cnidarians and chondrichthyan teeth.[1][2]