Crust Depth and Deep Drilling Curiosities
Uncle Ray explains the earth s crust averages 20 miles thick and notes deepest ocean floors reach seven miles. He recalls dry land boreholes only a few miles deep and that heat rises with depth, making a 20 mile or 80 mile journey require thick protective gear.
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Uncle Ray’s
By Ramon Coffman
Uncle Ray
Middletown
Ohio
Ray
R.F.D
Earth
Nickel
Iron