■ SOURCES OF INFORMATION ABOUT THE INTERIOR. [ PART 1]
#interiorofearth
□ DIRECT SOURCES
◇ Deep earth mining and drilling reveal the nature of rocks deep down the surface.
◇ But as mining and drilling are not practically possible beyond a certain depth, they don’t reveal much information about the earth’s interior.
◇ Mponeng gold mine (deepest mine in the world) and TauTona gold mine (second deepest mine in the world) in South Africa are deepest mines reaching to a depth of only 3.9 km.
◇ And the deepest drilling is only about 12 km deep hole bored by the Soviet Union in the 1970s over the Kola Peninsula.
◇ Volcanic eruption forms another source of obtaining direct information.