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The image shows a close-up of section of Ohio Division of Geological Survey's core DGS 3274 at the interval of 1218 feet. This section includes a normal fault in a breccia zone. 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 Serpent Mound Impact Structure in Bratton...
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...
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 213.5 to 214.5 feet and 215.5 to 216.5 feet. 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 Serpent Mound Impact Structure in Bratton Township,...
A photograph of the location for the abandoned Lewis mine slopes in Weathersfield Township, Trumbull County, Ohio. The Lewis mine was a subsurface mining operation for the Sharon (No. 1) coal. This location is where coal was first discovered on that side of the Ridge. The slopes are covered in the photograph, but it is near them that the active drain for the Ridge is found as a bubbling spring. The area of the mine has shale, siltstone, sandstone, conglomerate, limestone, underclay, coal and flint lithologies. Bedrock is from the Pennsylvanian Geologic Period. The photograph was taken during the summer field work of James Osborn Fuller and Myron T. Sturgeon in July 1941.
A waterfall on Clear Creek in the Fallsville Wildlife Area, Highland County, Ohio. This area has dolomite, shale, limestone and sandstone lithologies. Bedrock is from the Silurian Geologic Period. The image was an entry in the 1985 Ohio Geology Slide Contest.
The Lower Falls at Hocking Hills State Park, Hocking County, Ohio. Downstream from Old Man's Cave, Old Man's Creek encounters the resistant lowermost zone of the Black Hand Sandstone and cascades into a broad plunge pool as a scenic waterfall known as the Lower Falls. A large rock shelter is developed behind the waterfall. At the base of the rock shelter the contact between the Fairfield Shale and the Black Hand Sandstone Members of the Cuyahoga Formation can be seen. Bedrock is from the Mississippian Geologic Period. This photograph was an entry in the 1983 Ohio Geology Slide Contest.
Black Hand Sandstone rises 150 feet from the valley floor overlooking Laurel Run. Halfway up the face of the cliff is a row of five to seven
An outcrop of Black Hand Sandstone of the Cuyahoga Formation at Crane Hollow State Nature Preserve. Jane Ann and William Ellis organized Crane Hollow, Inc., in 1980 as a private, non-profit corporation that owns and administers the Crane Hollow Nature Preserve. The preserve encompasses more than 1,940 acres in Hocking County, Ohio. Access is by permit only to the 1,286 acres dedicated as a state nature preserve with the Ohio Department of Natural Resources, Division of Natural Areas and Preserves. Crane Hollow State Nature Preserve is part of the unglaciated Allegheny Plateau, with elevations from 780 feet to 1,140 feet. Bedrock is from the Mississippian Geologic Period.
Amish farmers working in fields in Lake Township, Stark County, Ohio. This area is an end moraine with loam till and thin loess cover.
Trails leading through the Lower Gorge come to Queer Creek and eventually to Cedar Falls at Hocking Hills State Park, Hocking County, Ohio. Cedar Falls is a semi-circular cliff over which Cedar Creek flows to form a waterfall, 50 feet in height. Behind the falls is a small recess cave formed by the sapping action of the plunge pool. The face of the waterfall is crossed by two deep grooves, formed by the abrasive action of small sand particles, through which the water flows. The rim of Cedar Falls is composed of the hard, massive upper layer of the Black Hand Sandstone. Two joint fractures are readily visible in the upper zone
A scenic view of Rockbridge at Rockbridge State Nature Preserve in Hocking County, Ohio. The image was taken by Michael C. Hansen in 1973. The Natural Arch and Bridge Society defines a natural arch as �a rock exposure that has a hole completely through it formed by the natural, selective removal of rock, leaving a relatively intact frame.� At 92 feet Rockbridge is Ohio's longest natural bridge. The bridge originated as a typical Hocking Hills alcove carved into the soft middle layer of Black Hand Sandstone at the head of a short box canyon cut by a small tributary of the Hocking River. Three intersecting vertical fractures in the roof of the shelter were gradually enlarged until the block they surrounded was no...
Ladd Natural Bridge is a natural bridge of resistant Permian Geologic Period Hockingport Sandstone near Cutler, Washington County, Ohio. The Natural Arch and Bridge Society defines a natural arch as �a rock exposure that has a hole completely through it formed by the natural, selective removal of rock, leaving a relatively intact frame.� The image was taken by Timothy A. Snyder in 1988.
Conkles Hollow Arch is a natural arch of resistant Mississippian Geologic Period Black Hand Sandstone in Conkle�s Hollow State Nature Preserve, Hocking County, Ohio. The Natural Arch and Bridge Society defines a natural arch as �a rock exposure that has a hole completely through it formed by the natural, selective removal of rock, leaving a relatively intact frame.�
Bass Islands Dolomite outcrop with stalactites in a cave on South Bass Island, Put-In-Bay Township, Ottawa County, Ohio. This area has dolomite, anhydrite, gypsum, salt and shale lithologies. Bedrock is from the Silurian Geologic Period. The slide image was created in 1952 by Philip M. Smith for the Ohio Cave Survey Project. The Ohio Cave Survey Project was formalized in 1952. The Central Ohio Grotto of the National Speleological Society in cooperation with the Ohio Geological Survey established a comprehensive survey of Ohio caves and caverns. The location is approximate to the center of the island.
Bracciated Greenfield Dolomite containing porphyroclasts of dolomite and sphalerite. The sample comes from a graben in the central uplift (from page 396 of The Serpent Mound Cryptoexplosion Structure, Southwestern, Ohio by Stephen P. Reidel and Frank L. Koucky part of the Geological Society of America's GSA Cincinnati '81 Field Trip Guidebooks, v. 2. Economic Geology, Structure). The Serpent Mound Impact Structure is an approximately 9-mile-diameter area of highly disturbed and structurally deformed bedrock at the intersection of Adams, Highland and Pike counties. The area of the impact structure has dolomite, shale, limestone, sandstone, and siltstone lithologies. Because of the geologic forces that have acted...
A specimen of fractured Ordovician limestone from the Serpent Mound Impact Structure. The specimen was collected by Stephen P. Reidel as part of the research for his Geology of the Serpent Mound Cryptoexplosion Structure a thesis submitted in partial fulfillment of the degree of Master of Science to the University of Cincinnati in 1972. The location given is approximate to the central point of the structure based on the specimen being collected by Dr. Reidel at the Serpent Mound Impact Structure, but the exact location in the structure not available at this time. The Serpent Mound Impact Structure is an approximately 9-mile-diameter area of highly disturbed and structurally deformed bedrock at the intersection of...
A specimen showing spheralite replacment without visible fracturing. The specimen shows contemporaneous solution of the dolomite and deposition of sphalerite. The photograph was taken by Stephen P. Reidel for his Geology of the Serpent Mound Cryptoexplosion Structure a thesis submitted in partial fulfillment of the degree of Master of Science to the University of Cincinnati in 1972. It appears as Photo 40 in his thesis document. The specimen was collected from the central uplift area of the Serpent Mound Impact Structure near the fifth and southernmost of Reidel's seven radiating anticlines (see Location 5 on the index map for Plate 1 in Appendix IV of the thesis). The Serpent Mound Impact Structure is an approximately...
A filled shaft at the abandoned Mahoning Coal Company No. 4 slope mine near Coalburg in Hubbard Township, Trumbull County, Ohio. The Mahoning Coal Company No. 4 mine was part of the Sharon (No. 1) coal subsurface mining operation in the Vienna-Coalburg area. The dump had been largely removed, but water seeps and timbers of the shaft along with a large glacial boulder were still visible at the opening to the mine. The area of the mine has shale, siltstone, sandstone, conglomerate, limestone, underclay, coal and flint lithologies. Bedrock is from the Pennsylvanian Geologic Period. The photograph was taken during the summer field work of James Osborn Fuller and Myron T. Sturgeon in July 1941.
Columnar joints in the Black Hand Sandstone of the Cuyahoga Formation that forms Old Man's Cave at Hocking Hills State Park, Hocking County, Ohio. Old Man's Cave is a large rock shelter in the northwest valley wall of Old Man's Creek. It is formed in the weakly cemented crossbedded middle zone of the Black Hand Sandstone. The rock shelter cave is about 200 feet long, 50 feet high, and 75 feet deep. The resistant uppermost zone of the Black Hand sandstone forms the roof of the cave. Bedrock is from the Mississippian Geologic Period.
Rock House is the only true cavern at Hocking Hills State Park, Hocking County, Ohio. The outcrop of Black Hand Sandstone rises 150 feet from the valley floor overlooking Laurel Run. Halfway up the face of the cliff is a row of five to seven


map background search result map search result map Rock Specimen from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1972 Rock Specimen from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1972 Rock Specimen from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1972 Core Sample DGS 3274 from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1996-2003 Core Sample DGS 3274 from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1996-2003 Core Sample DGS 3274 from the Serpent Mound Impact Structure Near Peebles, Adams County, Ohio, 1996-2003 Lewis Mine Slopes, Weathersfield Township, Trumbull County, Ohio, 1941 Mahoning Coal Company No. 4 Mine Dump in Hubbard Township, Trumbull County, Ohio, 1941 Rock House at Hocking Hills State Park, Hocking County, Ohio, 1945 Old Man's Cave at Hocking Hills State Park, Hocking County, Ohio The Lower Falls at Hocking Hills State Park, Hocking County, Ohio, 1983 Crane Hollow State Nature Perserve, Hocking County, Ohio Rock House at Hocking Hills State Park, Hocking County, Ohio, 1982 Cedar Falls at Hocking Hills State Park, Hocking County, Ohio, 1984 Amish Farming in Lake Township, Stark County, Ohio Falls on Clear Creek in the Fallsville Wildlife Area, Highland County, Ohio, 1985 Rockbridge State Nature Preserve, Hocking County, Ohio, 1973 Ladd Natural Bridge, Washington County, Ohio, 1988 Conkles Hollow Arch, Hocking County, Ohio South Bass Island, Ottawa County, Ohio, 1952