The time between Noah's flood and Peleg's tectonics was when the dispersal from Babel took place. From Babel small family groups spread out, figuratively speaking, to the ends of the Earth.
The Sons of Noah
September 2nd
Pangaea was a contiguous landmass after Noah's flood, but it appears to have had a centrally located ocean which became the Mediterranean sea. The coasts of this sea became the cradle of civilization.