Throughout southern Ohio and in adjacent parts of West Virginia and Kentucky, the preglacial drainage lines are all much choked with highly laminated silt, fine sand and, very locally, a coarse rubble. In Ohio, south of the glacial drift, such old valleys are clearly defined by certain topographic features and also by the character of the deposits in, them. Even far north of the terminal moraine, where they are occasionally exposed for examination, these old stream beds exhibit in many places along the walls large masses of characteristic silt, these bodies being remnants of the original filling that escaped destruction by glacial action. In general, these highly laminated silts are best developed along the old Kanawha or Teays system, evidently the master stream of the region, the headwaters of which were far to the southward. Such material is found not only along the main waterways of this old drainage . . .