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- The Shenandoah National Park is underlain by three general groups of rock units: (1) Mesoproterozoic granitic gneisses and granitoids, (2) Neoproterozoic metasedimentary rocks of the Swift Run Formation and metabasalt of the Catoctin Formation, and (3) siliciclastic rocks of the Lower Cambrian Chilhowee Group.
www.usgs.gov/publications/geologic-map-shenandoah-national-park-region-virginiaGeologic Map of the Shenandoah National Park Region, Virginia
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What is a metasedimentary rock in Shenandoah National Park?
What rocks are present in the Shenandoah Valley?
What is the geology of Shenandoah National Park?
What geologic units were found in Shenandoah?
Where can I find a mine in Shenandoah?
Which minerals are found in the Shenandoah Valley?
Today in Shenandoah National Park, the rocks of the Chilhowee Group form steep ridges and hollows that are covered in eroded rock debris called talus. These rocks have experienced weathering which has created soil able to support vegetation.
- Geologic Map of the Shenandoah National Park Region, Virginia
Geologic Map of the Shenandoah National Park Region,...
- Geologic Map of the Shenandoah National Park Region, Virginia
Oct 26, 2023 · The ancient Grenville rocks, the lava flows, and the sediments represent the three main geologic units found within Shenandoah. All of these events occurred over 400 million years ago and the Appalachian Mountains had yet to appear on the scene!
May 30, 2023 · Chilhowee metasedimentary rocks, from the shores of an ocean predating the Atlantic, now create the steep slopes and rugged topography of the park’s unique South District.
Aug 6, 2019 · Geologic Map of the Shenandoah National Park Region, Virginia. By Geology and Ecology of National Parks August 6, 2019. ShenandoahGeologicMap.pdf (37.28 MB)
- Mountain & Valley Building
- Limestone & Karst Terrain
- Other Rocks & Minerals
About half a billion years ago, the rocks that now make up the Shenandoah Valley solidified from ancient tidal flat sediments into vast, horizontal layers of limestone, shale, sandstone, and dolomite.
The Valley’s abundant limestone is evidence that the area was once under ocean water, long before the tectonic plates collided. Limestone forms in warm, shallow seas when generations of tiny sea creatures die and accumulate on the ocean floor, later to compress into solid rock.
Many rocks and minerals occupy the Shenandoah Valley besides limestone. Other sedimentary rocks in the region are sandstone, shale, and coal. There are igneous rocks like granite, gabbro, and basalt, and metamorphic rocks like slate, gneiss, and quartzite. Manganese, iron ores, zinc, lead, sulfur, gypsum, and pyrite are relatively common Shenandoah...
Nov 28, 2007 · Much of the history of these processes and of the resultant mountains can be found in the Blue Ridge rocks. Some geologic processes and events can be documented with certainty, others are more obscure, and many we can only speculate about.
The bedrock geology of SHEN can be subdivided into four main types of rock: (1) Mesoproterozoic metamorphic and igneous rocks that are approximately 1.2–1.0 billion years old; (2) Neoproterozoic metamorphic and igneous rocks that are approximately 800–570 million years old; (3) Paleozoic metamorphosed and non-metamorphosed sedimentary rocks ...
