PRELIMINARY RESULTS FROM THREE-DIMENSIONAL MAPPING OF SURFICIAL DEPOSITS OF THE MCCOMB 7.5 MINUTE QUADRANGLE, HANCOCK COUNTY, OHIO

Extensive mapping of surficial deposits has been done in the state of Ohio. The majority of this work has been done in a two-dimensional frame of reference, displaying only the units that are present at the surface and not including information below the surface. This study examines the three-dimensional distribution of surficial sediment units in a quadrangle in NW Ohio. The quadrangle contains a diverse set of glacial features including a transect across the Defiance end moraine, and surrounding areas of ground moraine, lake-planed ground moraine, and sand ridges. This project is associated with the three-dimensional mapping program of the Ohio Geological Survey and will be used to guide future mapping projects in the area. Data used for the compilation of the three-dimensional map are derived from both field investigations and from existing sources of information. A majority of the data comes from water well logs collected from the area. Other subsurface data are derived from ODOT logs, county and township drill logs, soil logs and existing soil maps, and bedrock topography maps. This three-dimensional map is being created within ArcInfo GIS to make the data more accessible and available to geologists and engineers. The methodology used for the data collection and preliminary maps are presented here. The resulting maps may provide new information on the glacial geology of the region and will be a beneficial tool for land-use planning and hazardous waste management.