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The geology of Virginia began to form at least 1.8 billion years ago. The oldest rocks in the state were metamorphosed during the Grenville orogeny , a mountain-building event beginning 1.2 billion years ago in the Proterozoic , which obscured older rocks.
Meanwhile, Rogers had published six "Reports of the Geological Survey of the State of Virginia" (Richmond, 1836–40), though there were few copies, and recognition of their significance was slow to develop. They were later compiled by Jed Hotchkiss and issued in one volume with a map as Papers on the Geology of Virginia (New York, 1884). [9]
The Boscobel complex (originally "Boscabel bowlder beds") is unit of interlayered granite and gneiss within Goochland and Powhatan Counties, Virginia. The area had been mapped as the Petersburg Granite in 1970 by B. K. Goodwin. [2] The complex is mapped in a single, fault-bound area approximately 9 km long.
Ernst Cloos (May 17, 1898, Saarbrücken, Saarland – May 24, 1974, Baltimore, Maryland) was a German-American geologist, known as an outstanding structural geologist [1] and a leading expert on the geology of the central Appalachians.
Pages in category "Geology of Virginia" The following 11 pages are in this category, out of 11 total. This list may not reflect recent changes. ...
The Edinburg Formation is an Ordovician-age geological formation in Virginia. It is primarily composed of basinal (deep sea) limestone and shale, and is one of the younger units in the "Middle Ordovician" sequence of the Shenandoah Valley. However, fossils have shown that it actually was deposited in the early part of the Late Ordovician.
The Calvert Formation is a geologic formation in Maryland, Virginia, and Delaware. It preserves fossils dating back to the early to middle Miocene epoch of the Neogene period . It is one of the three formations which make up the Calvert Cliffs , all of which are part of the Chesapeake Group .
The Otterdale Formation is a geologic formation in Virginia.It preserves fossils dating back to the Triassic period.. It was first identified at exposures near Otterdale, Chesterfield County, Virginia, within the Richmond Basin.