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Lot Essay
Ziesing's globe was based on his work of 1967, and was produced to demonstrated the cartographic superiority of using a three-dimensional globe as opposed to flat maps when considering global tectonic processes. The late 1960s saw a revolution in geology when Wegener's previously discredited theory of Continental Drift as well as sea-floor spreading entered into mainstream Western science. In Soviet Russia, however, the theories of plate tectonics took longer to become accepted, and a vertical theory of tectonics was preferred.