End Moraines of North-Central Ohio

Abstract

North-south projected profiles of eighteen quadrangles in north-central Ohio were constructed with sufficient vertical exaggeration to show the end moraines. From a study of these profiles and of supplementary east-west and northwest-southeast profiles of parts of the area and from field work the positions of the end moraines were mapped. The Powell moraine in the area trends northward from Delaware County through Morrow County and dies out in southwestern Richland County. The Broadway moraine is traced from northeastern Logan County eastward to Morrow County where it turns north across Morrow County to join the Wabash moraine in eastern Crawford County. In much of Morrow County it lies very close to the Powell moraine but does not join it. The St. Johns moraine is traced eastward across Hardin County to central Marion County, thence north through Marion to join the Wabash moraine in southwestern Crawford County. The Wabash moraine extends across Hardin, Marion, southeastern Wyandot, and Crawford counties, joining the Fort Wayne moraine in the eastern part of the latter county and continuing eastward across northern Richland County. The Fort Wayne moraine is traced in a general easterly direction across the area. The Defiance moraine is strongly developed across the whole area.