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     • The ancient Grenville rocks, the lava flows, and the sediments represent the three main geologic units found within Shenandoah.
     www.nps.gov/shen/learn/nature/geologicformations.htm

     Geologic Formations - Shenandoah National Park (U.S. National ...

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   What geologic units were found in Shenandoah?

   • In the valleys and ridges to the west, thick sequences of limestone and other marine rocks preserve evidence for the rest of this underwater period. The ancient Grenville rocks, the lava flows, and the sediments represent the three main geologic units found within Shenandoah.

   Geologic Formations - U.S. National Park Service

   www.nps.gov/shen/learn/nature/geologicformations.htm

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   What is the geology of Shenandoah National Park?

   • Appalachian Mountains To really understand the geology of Shenandoah National Park, we first have to look at the park’s setting. It is located in the Appalachian Mountains, an ancient mountain range in the eastern United States that started to form roughly 470 million years old, when separate landmasses started to converge.

   Geology of Shenandoah National Park | U.S. Geological Survey - USGS.g…

   www.usgs.gov/geology-and-ecology-of-national-parks/geology-shenandoah-national-park

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   What is a metasedimentary rock in Shenandoah National Park?

   • The sedimentary rocks experienced metamorphism andthe rocks of the Chilhowee Group are called metasedimentary rocks. 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.

   Geology of Shenandoah National Park | U.S. Geological Survey - USGS.g…

   www.usgs.gov/geology-and-ecology-of-national-parks/geology-shenandoah-national-park

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   Which rocks are found in Shenandoah National Park?

   • Within the Shenandoah National Park region, abundant beds of sandstone, quartzite, and metasiltstone are found.

   Geologic Map of the Shenandoah National Park Region ... - USGS

   pubs.usgs.gov/of/2009/1153/pdf/ofr2009-1153-pamphlet.pdf

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   Who created the first geologic map of Shenandoah National Park?

   • Gathright (1976) produced the first geologic map of the Shenandoah National Park in the form of 1:62,500-scale maps for the northern, central, and southern sections. Gathright and others (1977, 1978a, b, c) also used more recent data (Rader and Biggs, 1975) for this purpose. Historically, studies of the surficial geology in the region were incidental to

   Geologic Map of the Shenandoah National Park Region ... - USGS

   pubs.usgs.gov/of/2009/1153/pdf/ofr2009-1153-pamphlet.pdf

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   Why is Shenandoah National Park rounded?

   • Shenandoah National Park is nestled within the Blue Ridge province of the Appalachian Mountains, which extends from Pennsylvania southward. The Blue Ridge Mountains are more rounded than those farther west. This is because these are some of the older mountains in the Appalachian Range, and there has been more time for erosion to occur.

   Geology of Shenandoah National Park | U.S. Geological Survey - USGS.g…

   www.usgs.gov/geology-and-ecology-of-national-parks/geology-shenandoah-national-park

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3. www.nps.gov › shen › learnGeologic Formations - Shenandoah National Park (U.S. National ...

   www.nps.gov › shen › learn

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   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!

   • Sediments

     The youngest rocks within Shenandoah National Park are still...

   • Basement Rocks

     Granitic rock below Hogback Mountain . Eric Butler - NPS...

   • Greenstone Lava Flows

     Greenstone cliff at Crescent Rock . Eric Butler - NPS Photo....

   • Geology

     Current geological activity in Shenandoah National Park is a...

4. www.usgs.gov › geology-and-ecology-of-nationalGeology of Shenandoah National Park | U.S. Geological Survey

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   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.

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6. www.nps.gov › shen › learnGeology - Shenandoah National Park (U.S. National Park Service)

   www.nps.gov › shen › learn

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   May 30, 2023 · Current geological activity in Shenandoah National Park is a result of natural and man-made forces acting on the surrounding mountains and valleys. Freezing and thawing can result in rockfalls and spalling from cliff faces.

7. www.usgs.gov › media › filesGeologic Map of the Shenandoah National Park Region, Virginia

   www.usgs.gov › media › files

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   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)

8. Videos

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     Everything to know about Shenandoah National Park

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     Shenandoah National Park - Things to Do and See When You Visit

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     Shenandoah National Park | 4K

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9. www.npshistory.com › publications › geologyGeology of the Shenandoah National Park, Virginia (Introduction)

   www.npshistory.com › publications › geology

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   Nov 28, 2007 · The quiet but rugged grandeur of the wilderness, the high meadows and rocky slopes, the arcuate escarpments, and plunging cataracts in the park area all compound a feeling of permanence that belies the action of ongoing geologic processes.

10. pubs.usgs.gov › of › 2009Geologic Map of the Shenandoah National Park Region, Virginia

    pubs.usgs.gov › of › 2009

    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

11. www.snp.guide › p › the-geological-formation-ofGuide to Shenandoah National Park and Skyline Drive: The ...

    www.snp.guide › p › the-geological-formation-of

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    The geologic story of Shenandoah National Park began 1 billion years ago. Molten magma, miles beneath the earth's surface, slowly solidified to become the "basement rock," or core, of what we know today as the Blue Ridge Mountains.