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Ohio transitioned to dryland conditions in the Pennsylvanian, forming large coal swamps and the region has been dryland ever since. Until the Pleistocene glaciations erased these features, the landscape was cut with deep stream valleys, which scoured away hundreds of meters of rock leaving little trace of geologic history in the Mesozoic and ...
London Hammer: Also known as the "London Artifact", a hammer made of iron and wood that was found in London, Texas, in 1936. Part of the hammer is encased in "400-million-year-old" ("Ordovician era") rock. In 1985, anthropologist John R. Cole [40] hypothesized that the stone surrounding the hammer is a recent carbonate soil concretion.
Sheriden Cave is a Paleo-Indian archaeological site from the late Ice age in Wyandot County, Ohio. [1] Glacial deposits sealed off the cave more than 10,000 years ago. Sheriden Cave is a karst sinkhole on a dolomite ridge that crosses Hancock and Wyandot
The area had modern transportation, an energy source, and a skilled workforce. The transportation infrastructure included the Ohio River, the National Road, [6] and railroads, including the Baltimore & Ohio Railroad and the Central Ohio Railroad. Coal was the local energy source, as Belmont County was part of the eastern Ohio coal region. A ...
The Pottsville Formation consists of a gray conglomerate, fine to coarse grained sandstone, and is known to contain limestone, siltstone and shale, as well as anthracite and bituminous coal. [ 4 ] [ 5 ] It is considered a classic orogenic molasse . [ 6 ]
The Allegheny Group, often termed the Allegheny Formation, [2] is a Pennsylvanian-age geological unit in the Appalachian Plateau.It is a major coal-bearing unit in the eastern United States, extending through western and central Pennsylvania, western Maryland and West Virginia, and southeastern Ohio.
Twenty-six barges loaded mostly with dry cargo broke loose from a Pittsburgh marina late Friday night and floated uncontrollably down the Ohio River, causing extensive damage to neighboring docks ...
The Shawnee Lookout Archeological District is a historic district in the southwestern corner of the U.S. state of Ohio. [1] Located southwest of Cleves in Hamilton County's Miami Township, [2] the district is composed of forty-six archaeological sites spread out over an area of 2,000 acres (810 ha). [1]