The interior off the Earth
Our knowledge of the Earth's interior is at present based
on those direct investigations that can be made to depths
of a few kilometres from the surface, together with extrapolations to lower levels. Studies of heat-flow, geostatic
pressure, earthquakes, and estimations of isostatic
balance (p. 6) reveal much about the interior of the Earth
The interior off the Earth Our knowledge of the Earth's interior is at present based on those direct investigations that can be made to depths of a few kilometres from the surface, together with extrapolations to lower levels. Studies of heat-flow, geostatic pressure, earthquakes, and estimations of isostatic balance (p. 6) reveal much about the interior of the Earth