Devils Lake, North Dakota

Upper photo: View from west to east with Sullys Hill on horizon to right (south) and part of Devils Lake visible to left (north). Sullys Hill rises about 200 m above the floor of Devils Lake. The forested hill is composed of bedrock (shale) and sediment thrust out of the lake basin. Photo date 7/91; © by J.S. Aber.

Lower photo: View from top of Sullys Hill looking northward across Devils Lake (Main Bay). The basin and hill represent a very large and well formed hill-hole pair, which was created by ice thrusting over the Spiritwood aquifer that runs beneath the lake basin. Photo date 7/91; © by J.S. Aber.

Return to article