off the coast of Mexico where the crust is thinest
To an extent it was not.
15 years
The ISBN of The Mohole Mystery is 0571082106.
The Mohole Mystery was created in 1968.
The original goal was to learn more about the characteristics of the material found at the interface of the earth's crust and the underlying mantle.
Mohole Mystery is by Hugh. Walters. It has 185 pages. It is a Chris Godfrey novel published in 1969.
Look up Project Mohole. It was intended to drill to the mohoravic discontinuity, but did not make it due to unanticipated problems.
It takes place from the project approval to closeout.
1942to1945
The Mohole.
15 years
in 1968