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The image shows a close-up of sections in Box 22 of Ohio Division of Geological Survey's core DGS 3274 at the interval of 219.5 to 220.5 feet and 221.5 to 222.5 feet. The section includes fossil bearing limestone. This core section comes from the central uplift of the Serpent Mound Impact Structure, which has dolomite, shale, limestone, sandstone, and siltstone lithologies. Because of the geologic forces that have acted on the site of the impact structure, bedrock in the area is a mixture of uplifted, down dropped, faulted, folded and eroded rock from the Ordovician, Silurian, Devonian and Mississippian Geologic Periods. In 1979, John L. Carroll Mineral Exploration of New York City drilled two core holes in the...
A field trip to the Caesar Creek State Park emergency spillway in Warren County, Ohio. Bedrock is from the Ordovician Geologic Period. Ordovician rocks exposed in southwestern Ohio are well known for the abundance, variety, and excellent preservation of fossils they contain. The limestones and shales are excellent for collecting fossils including brachiopods, bryozoans, gastropods, and trilobites. The image was made after a teachers workshop field trip probably in 1993.
An outcrop showing the Dunkard Group stratigraphy at a road cut on the east side of Ohio State Route 7 at Belpre, Washington County, Ohio. This area has shale, siltstone, mudstone, sandstone, limestone and coal lithologies. Bedrock is from the Late Pennsylvanian, Early Permian Geologic Period. The photograph was taken by Michael C. Hansen in 1968. At the time, Dr. Hansen was working as a graduate student intern for the summer with the Cleveland Museum of Natural History. His fieldwork included excavating the bone bed at this location for fossil remains of tetrapods and xenacanth sharks.
Close-up image of fossils in Columbus Limestone on the bank of the Scioto River at Griggs Reservoir in Franklin County, Ohio. Bedrock is from the Devonian Geologic Period. Photograph was taken by E. Mac Swinford in 1991.
Brachiopod fossils (Mesolobus and Chonetids) in core at the site of Drill Hole #10 for coal exploration at the Deep Core II project in Seneca Township, Monroe County, Ohio. The drill core is described in Ohio Geological Survey Core Record File No. 2410. The image was taken in 1977.
Close-up image of Stromatolite fossils in Columbus Limestone at the Marblehead Quarry, Ottawa County, Ohio. Bedrock is from the Devonian Geologic Period. Photograph was taken by Merrianne Hackathorn.
Probable trace fossils found at the Bowerston Shale Company's shale pit during an Ohio Geological Survey Teachers Workshop tour at Hanover, Licking County, Ohio. Bedrock is from the Mississippian Geologic Period. The image was made by Sherry L. Weisgarber in 1988.
    map background search result map search result map Fossils at Griggs Reservoir, Franklin County, Ohio, 1991 Stromatolites Fossil at Marblehead Quarry, Ottawa County, Ohio Dunkard Group Stratigraphy at Belpre, Washington County, Ohio 1968 Core Sample DGS 3274 from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1996-2003 Bowerston Shale Company Operation at Hanover, Licking County, Ohio, 1988 Caesar Creek State Park in Warren County, Ohio, 1993 Deep Core Project in Monroe County, Ohio, 1977