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A salt dome is a geological structure of sodium chloride (halite) which is deformed and intruded in the adjacent rocks.

Evaporite minerals are minerals found in sedimentary rocks that are formed as precipitates from the evaporation of a saline solution. A diapir structure formed by evaporite minerals is a salt dome.

If you had referred Spindle top as a noun then ,it is a salt dome oil field located in the southern portion of Beaumont, Texas in the United States. The Spindletop dome was derived from theLouann Salt evaporite layer of the Jurassic geologic period

The Upheaval Dome is located in Canyonlands National Park. Canyonlands National Park is located in Utah. There is controversy over what exactly the Upheaval Dome is. Some experts say it is an impact crater, while others seem to think it is a pinched off salt dome.