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The Marietta Earthworks is an archaeological site located at the confluence of the Muskingum and Ohio Rivers in Washington County, Ohio, United States. Most of this Hopewellian complex of earthworks is now covered by the modern city of Marietta. Archaeologists have dated the ceremonial site's construction to approximately 100 BCE to 500 CE.
In the case of hydrothermal fluids, host rocks are older than the predominantly aqueous fluids that carry and deposit metals and thus complicate defining a host rock associated with gold fluid formation. A number of rock types have been suggested as the source of orogenic gold, but due to the variability of host rocks in Earth’s history and ...
The Google Earth API was a free beta service, allowing users to place a version of Google Earth into web pages. The API enabled sophisticated 3D map applications to be built. [ 84 ] At its unveiling at Google's 2008 I/O developer conference, the company showcased potential applications such as a game where the player controlled a milktruck atop ...
[2] It was the first frontier fort built in Ohio Country. [3] It is notable as the site for the 1789 Treaty of Fort Harmar between the United States and several Native American tribes. The presence of Fort Harmar was influential in the founding of Marietta, Ohio in 1788 to the east across the Muskingum.
The Putnam Bridge, also known as the Marietta Bridge and the Marietta Street Bridge, is a historic United States river crossing that connects Marietta, Ohio, with its Fort Harmar district. The original 1880 bridge was the first free crossing of the Muskingum River. The 1913 bridge was a contributing structure to the Harmar Historic District.
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The Rinard Covered Bridge, near Marietta, Ohio, was built in 1876. It was listed on the National Register of Historic Places in 1976. [1] It is a Smith truss bridge built by the Smith Bridge Company of Toledo, Ohio and is a work of H. H. Townsend. It has also been known as Hendershott's Ford Bridge. [1]