How to find the volume of a flat topped anticline?

The top of an anticline has an area of 850 acres and the surface area of the surrounding rock connecting the base to the top is 800 acres. The height of the anticline from the base to the top is 80 ft. Is it possible to calculate the volume of this structure with this information? The area of the base is unknown.

2016-01-12T15:15:17Z

An anticline is a geological structure that is shaped like an upside-down bowl

Paula2016-01-12T18:55:49Z

If I understand your question correctly: no there is not enough information to solve this.
It should be possible to create two different structures which satisfy the description but have different volumes:
one where the surface goes converges towards the bottom (i.e. an upside down cone), and one where the surface spreads out towards the bottom (like a 3-D trapezoid which is wider at the bottom that the top).