Evidence of the Earth's Interior
Volcanic Problems - Magma from volcanoes in the form of lava as well as gas and pyroclastic material. Depth average 80-100 miles.
Ophiolite Complexes - Slabs of Oceanic rock scrapped off a decending Oceanic plate. Average depth 7km.
Deep Mines - Deep gold and diamond mined in South Africa and Canada. Average Depth 4km.
Bore Holes - In Siberia where the crust is thinest…