COLUMBUS, OH - A new map that shows the glacial geology of southwest Ohio, including Hamilton, Clermont, and portions of Butler and Warren counties, is now available from the Ohio Department of Natural Resources (ODNR) Division of Geological Survey.
This map will have both technical and non-technical applications for geologists, engineers, land-use planners, ground water specialists, educators and homeowners. The map is useful for anticipating potential landslide hazards or locating sand and gravel resources, for example. The full color, wall-size map is the first in a series of regional maps that for the first time characterize the distribution and thickness of Ohio's glacial, post-glacial and related deposits from the surface down through the uppermost buried bedrock. The map includes text and figures as interpretation guides, a list of data sources and a description of map units.
Ice Age glaciers reached what is now southwestern Ohio during three major glacial episodes, depositing clay, silt, sand, and gravel across the landscape. The map uses color to depict the distribution of the uppermost deposits. A coding system helps identify the type and thickness of all major unconsolidated material from the surface down to bedrock.
One remarkable feature of the map is the variable types and thickness of sediment at the surface and in major river valleys such as the Great Miami River, Little Miami River, Mill Creek, and the wide valleys now occupied by Dicks Creek and Little Muddy Creek. Some valleys contain thick river deposits, indicating a potential source of sand and gravel or water. Other valleys have landslide-prone deposits of clay and silt, a well-known geological hazard in the Cincinnati region. Until now the distribution and thickness of these sediments were poorly understood. Other maps in the surficial-geology map series will be released later in 2004 and 2005 for the regions of Canton, Cleveland, Columbus, Dayton, Lancaster, and Newark.
Copies of the wall-size version of the Surficial Geology of the Ohio portions of the Cincinnati and Falmouth map may be ordered for $15, plus $4 handling and $1.02 tax (Ohio addresses only). Add $1.50 for a tube to have the map rolled. To get a map, call 614-265-6576 or write to ODNR Division of Geological Survey, 4383 Fountain Square Drive, Columbus, OH 43224-1362.