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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. Throughout the Proterozoic and Paleozoic, Virginia experienced igneous intrusions ...
The geologic processes that led to the formation of the Appalachian Mountains started 1.1 billion years ago. The first mountain range in the region was created when the continents of Laurentia and Amazonia collided, creating a supercontinent called Rodinia. The collision of these continents caused the rocks to be folded and faulted, creating ...
The Appalachian Mountains formed through a series of mountain-building events over the last 1.2 billion years: [ 4][ 5] The Grenville orogeny began 1250 million years ago (Ma) and lasted for 270 million years. The Taconic orogeny began 450 Ma and lasted for 10 million years. The Acadian orogeny began 375 Ma and lasted 50 million years.
Geologic Map of West Virginia. West Virginia's geologic history stretches back into the Precambrian, and includes several periods of mountain building and erosion. At times, much of what is now West Virginia was covered by swamps, marshlands, and shallow seas, accounting for the wide variety of sedimentary rocks found in the state, as well as its wealth of coal and natural gas deposits.
Blue Ridge Mountains - Front Royal, Virginia Although the term "Blue Ridge" is sometimes applied exclusively to the eastern edge or front range of the Appalachian Mountains, the geological definition of the Blue Ridge province extends westward to the Ridge and Valley area, encompassing the Great Smoky Mountains, the Great Balsams, the Roans, the Blacks, and other mountain ranges.
Ridges and valleys near Norton, Virginia in Wise County, Virginia A map of the Cumberland Plateau and Ridge and Valley Appalachians on the border between Virginia and West Virginia An aerial view Massanutten Mountain, including the south fork of the Shenandoah River (on left) and part of the Blue Ridge Mountains in Virginia
Shenandoah National Park / ˈʃɛnənˌdoʊə / (often / ˈʃænənˌdoʊə /) is a national park in the Eastern United States that encompasses part of the Blue Ridge Mountains in the Commonwealth of Virginia. The park is long and narrow, with the Shenandoah River and its broad valley to the west, and the rolling hills of the Virginia Piedmont ...
Massanutten Mountain is a synclinal ridge in the Ridge-and-Valley Appalachians, located in the U.S. state of Virginia . Image displaying the topographical differences between two roughly parallel ridges along Virginia's western border: one is the backbone of Shenandoah National Park (right), and the other is Massanutten Mountain (middle/left).
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