Yarmouthian The second (0.23–0.17 Ma) of four interglacial stages recognized in mid-continental North America. It follows the Kansan glacial episode and is equivalent to the upper part of the Günz/Mindel Interglacial of the Alps. At various times during the Yarmouthian climates were both warmer and cooler than they are now.

Yarmouthian The second (0.7–0.55 Ma) of four interglacial stages recognized in mid-continental N. America. It follows the Kansan glacial episode and is equivalent to the upper part of the Günz/Mindel Interglacial of the Alps. At various times during the Yarmouthian climates were both warmer and cooler than they are now.