Gypsum Spring Formation
| Gypsum Springs Formation Stratigraphic range: Middle Jurassic |
|
|---|---|
| Type | Geological formation |
| Thickness | up to 76 metres (250 ft) |
| Lithology | |
| Primary | Gypsum |
| Other | Shale, dolomite, limestone |
| Location | |
| Region | Williston Basin |
| Country |
 United States
|
| Type section | |
| Named for | Gypsum Springs, Wyoming |
| Named by | J.D. Love, 1939 |
The Gypsum Springs Formation is a stratigraphical unit of Middle Jurassic age in the Williston Basin.
It takes the name from Gypsum Springs in Wyoming, and was first described in outcrop in Freemont County by J.D. Love in 1939.
The Gypsum Springs Formation is composed of massive white gypsum in the lower part, and alternating gypsum, red shale, dolomite and limestone.
The Gypsum Springs Formation reaches a maximum thickness of 76 metres (250 ft) in central Wyoming. It occurs from the Black Hills in South Dakota through Wyoming and into southern Saskatchewan.
It is equivalent to the upper part of the Watrous Formation and the lower part of the Gravelbourg Formation in Saskatchewan.
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