Clemente Formation
| Clemente Formation | |
|---|---|
| Stratigraphic range: Ediacaran | |
| Type | Geological formation |
| Unit of | Caborca miogeoclinal sequence |
| Underlies | Pitiquito Quartzite |
| Overlies | Caborca Formation |
| Thickness | 210 m (690 ft) |
| Lithology | |
| Primary | siltstone, sandstone, quartzite, and conglomerate |
| Other | oolitic and aphanitic dolomite |
| Location | |
| Coordinates | 30°18′24″N 111°56′24″W / 30.30667°N 111.94000°W |
| Region | Cerro Rajon region, northern Sonora, Mexico |
| Country | Mexico |
| Type section | |
| Named for | Cerro Clemente |
| Named by | Stewart and others (1984) |
The Clemente Formation is a geologic formation composed of 210 m (690 ft) of Ediacaran siltstone, sandstone, quartzite, conglomerate, and minor dolomite. It is exposed in the exposed in the area of Cerro Rajon south of Caborca, northern Sonora, Mexico. It contains an oolitic dolomite marker bed correlated with the Johnnie Formation in Death Valley, California, and preserves an isotopic record of the Shuram excursion.
At its type section, the Clemente Formation consists of 210.3 m (690 ft) of siltstone, sandstone, quartzite, conglomerate, and minor dolomite exposed in the Cerro Rajon area. It is named for Cerro Clemente, Sonora, which lies about 11 km (6.8 mi) south-southwest of the location of its composite type section. Cerro Rajon lies about 2.3 km (1.4 mi) south-southeast of the type section.