“The Day the Earth Exploded”
Superman deals with aliens who are trying to put the continents back into the original Pangea configuration.
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Action Comics #550 (1938) is issue #550 of DC's Action Comics (1938–2011), with a cover date of December 1983. Written by E. Nelson Bridwell and Bob Rozakis and drawn by George Tuska.
Credits, characters and story details from the Grand Comics Database, CC BY-SA 4.0.