Wegener found that mountain ranges and rock bands that abruptly terminated at one continent’s edge were found to continue on in another continent.
No evidence of these formations was found in the intervening oceans. Mountains of similar age and structure to the Appalachian Mountains, for example, were found to continue in a band through the British Isles, and Scandinavia. Moving these continents back to their original shape in Pangaea resulted in these mountain ranges and rock bands forming clear, continuous bands.
Rock ages provided another important piece of geological evidence.