The Exeter Sandstone is a geologic formation exposed in northeastern New Mexico.

[1] Its age is poorly controlled, but it is thought to have been deposited during the middle Jurassic.

[2] The formation consists of up to 24 meters (79 ft) of white to pale pink crossbedded quartz sandstone.

It unconformably overlies the Sheep Pen Sandstone and is in turn overlain by the Bell Ranch Formation.

[1] The Exeter Formation varies greatly in thickness, with the maximum thickness in synclinal valleys of the underlying Dockum Group and the formation being absent on some anticlinal crests of the Dockum Group.