Many of the highest peaks in Shenandoah National Park (including Hawksbill, Stony Man, and Hightop Mountain, just to name a few) are underlain by distinctive bluish-green rocks that were once ancient lava flows (Virginia is for Lavas! Most of them are as old as 1-1.2 billion years ago. The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. The park offers geological tours for all interests. Once again, the plates reversed direction and moved apart, this time to form the beginnings of the Atlantic Ocean. ... Another type of map that the USGS has provided the National Park Service with is geologic maps. 18 p Policies and Notices, U.S. Department of the Interior | Posted by 4 days ago. Compton Peak is an easy and noteworthy hike in the North District of Shenandoah National Park. 2020 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 Shenandoah National Park Geologic Formations. Don't... Price subject to change | Available through Backcountry.com. Geologic Formations. Surficial deposits in the highlands include colluvium and debris fans. The map covers the central section and western limb of the Blue Ridge-South Mountain anticlinorium. 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 to the east. 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. Additional geologic data of the adjacent areas are included to provide regional context. However, the story of Shenandoah's mountains is really the story of two mountain ranges, spanning over one billion years of earth's history. There are many spectacular valley and mountain views to enjoy across Shenandoah National Park. Metabasalt underlies much of the highlands, like Stony Man (1,200 meters). This park, which is located close to Washington, D.C., is a favorite of hikers containing 101 miles of the Appalachian … Evidence of this past terrain can still be seen in the shape of contacts between the old Grenville rocks and the younger rocks above. Natural Bridge is a geological formation in Rockbridge County, Virginia, comprising a 215-foot-high (66 m) natural arch with a span of 90 feet (27 m). The casual observer may sense that there is no geologic activity at Shenandoah National Park. Malcolm gave an overview of geologic history of the Blue Ridge and Shenandoah National Park… 104k members in the geology community. 2005. The Page Valley is underlain by Cambrian and Ordovician carbonate rocks. The distribution and types of surficial deposits and landforms closely correspond to the different physiographic provinces and their respective bedrock. quadrangles in and around Shenandoah National Park have been mapped (or remapped) at 1:24,000 scale in the last decade (Fig. Shenandoah National Park /ˈʃɛnənˌdoʊə/ is an American national park that encompasses part of the Blue Ridge Mountains in the Commonwealth of Virginia. Naturalist Keith Tomlinson covers its geological origins to present-day conservation efforts, providing an … The main road through the park, Skyline Drive, runs close to the highest points. 2). The rocks of this park are mostly "ancient granitic and metamorphosed volcanic formations. URL: https://pubs.usgs.gov/of/2009/1153/ Virginia is for Lavas- The Catoctin Formation. Shenandoah National Park EXECUTIVE SUMMARY This report documents the results of a four year research project to assess and map vegetation communities of Shenandoah National Park. Shenandoah straddles the Blue Ridge, a unique line of mountains forming the easternmost rampart of the great Appalachian Range. FOIA © 2000 - Fish and aquatic invertebrate communities in waterways, and contaminants in fish, at the Batataria Preserve of Jean Lafitte National Historic Park and Preserve, Louisiana, 1999-2000. Shenandoah National Park Geologic Formations. This process, very similar to the forces creating the Himalayas today, produced incredible heat and pressure that melted and deformed the rocks deep in the mountains' core. The story of Shenandoah’s mountains is the story of two mountain ranges, spanning over one billion years of earth’s history. The third and fourth sections zoom in on Shenandoah, revealing specific links between the park’s geologic features and other aspects of it’s natural and cultural history. This information supports science-based geoconservation and interpretation in the NPS, as well as STEM education in schools, museums, and field camps. Numerous sinkholes and caves are due to the dissolution of the carbonate bedrock. The geology at Blackrock is fascinating. In the Blue Ridge Province of northern Virginia, Maryland, and southern Pennsylvania, Lower Cambrian beds are underlain by a thick sequence of greenstone and interbedded sedimentary rocks known as the Catoctin Formation. Southworth, Scott, Aleinikoff, J.N., Bailey, C.M., Burton, W.C., Crider, E.A., Hackley, P.C., Smoot, J.P., and Tollo, R.P., 2009, Geologic map of the Shenandoah National Park region Virginia: U.S. Geological Survey Open-File Report 2009–1153, 96 p., 1 plate, scale 1:100,000. As this ocean (named Iapetus) spread over the land, it left behind thick deposits of sediments that hardened into layered sedimentary rocks . and T.W. The focus of the study was the park and surrounding areas to provide the National Park Service with modern geologic data for resource management. Almost 40% of the land area—79,579 acres (124.3 sq mi; 322.0 km )—has been designated as wildernessand is protected as p… Famous roads in the national parks, such as Shenandoah’s Skyline Drive or Glacier’s Going-to-the-Sun Road would not have been as successful without accurate topographic maps. 1/3. Shenandoah National Park, located in Virginia, is a thin stretch of wilderness hugging the Blue Ridge Mountains. The lowlands have broad alluvial fans, alluvial plains, and fluvial terraces. 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 … “The geology of Shenandoah is a fascinating story and is told in many ways,” said Amberson. U.S. Geological Survey Scientific Investigations Report 2007-5160. 6 … Today, the worn-down roots of the Appalachians lie quietly along the flank of the still-widening Atlantic, waiting for the cycle to start anew. 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. Ridges underlain by siliciclastic rocks have abundant boulder fields. ), and are part of a geologic unit known as the Catoctin Formation. U.S. Geological Survey Shenandoah straddles the Blue Ridge, a unique line of mountains forming the easternmost rampart of the great Appalachian Range. However, the story of Shenandoah's mountains is really the story of two mountain ranges, spanning over one billion years of … The rest of the story returns to the mountain-building processes originally active during Grenville times, as the tectonic plates reversed themselves and began to collide once more. This great collision, between Europe and North Africa on one side and North America on the other, closed the Iapetus Ocean and created a massive new mountain range as the thick layers of sediment that once lay miles below water were now thrust up into new summits. Yet all of these events occurred over 400 million years ago, and the Appalachian Mountains had yet to appear on the scene! Vast quantities of lava rose through a developing system of rifts, erupting onto the surface along rift zones that stretched for thousands of miles along what is now eastern North America. Current geological activity in Shenandoah National Park is a result of natural and man-made forces acting on the surrounding mountains and valleys. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place. This means if you are hoping to do some serious climbing, this is not the park for you. The servicewide Geodiversity Atlas provides information on geoheritage and geodiversity resources and values within the National Park System. The geologic map can be used to support activities such as ecosystem delineation, land-use planning, soil mapping, groundwater availability and quality studies, aggregate resources assessment, and engineering and environmental studies. National Park Service Geodiversity Atlas. Many of the highest peaks in Shenandoah National Park (including Hawksbill, Stony Man, and Hightop Mountain, just to name a few) are underlain by distinctive bluish-green rocks that were once ancient lava flows (Virginia is for Lavas! By 200 million years ago, however, these forces had abated once more, and the Appalachians were eroding away just as their ancestors, the Grenville Mountains, had done. Skyline Drive stretches for 105 miles along the crest of the Blue Ridge Mountains in Shenandoah National Park. Water drains northwestward to the South Fork of the Shenandoah River and southeastward to the James and Rappahannock Rivers. The Great Valley section of the Valley and Ridge province is west of Blue Ridge and consists of Page Valley and Massanutten Mountain. Severe thunderstorms and rain events can cause flooding and associated erosion. Sunny days are commonly known to be pretty, and in Shenandoah they undoubtedly were. For the length of the Drive, rock formations by the road and on mountainsides provide clues to the dramatic history of this area. The youngest rocks in Shenandoah are river, lagoon, and beach deposits left behind by the early stages of the Iapetus. Additional geologic data of the adjacent areas are included to provide regional context. Geology Field Trip in Shenandoah National Park April 12, 2018 After being snowed out in December and postponed in early April, this field trip was finally held on Thursday, April 12. Certainly there are no active volcanoes or glaciers, but geologic events do occur here. The siliciclastic rocks underlie linear ridges from 800 to 400 meters in altitude. The Skyline Drive and Appalachian National Scenic Trail straddle the drainage divide of the Blue Ridge highlands. ), and are part of a geologic unit known as the Catoctin Formation. The project was a collaborative effort between Shenandoah National Park, the US Geological Survey-Leetown Science Center, the Virginia Department of Conservation and For hundreds of millions of years, the once-lofty Grenville range slowly wore away, until it was no more than a landscape of rolling hills and occasional higher points, rather similar to the Virginia Piedmont found east of Shenandoah today. Shenandoah National Park straddles the Blue Ridge, a unique line of mountains forming the easternmost rampart of the great Appalachian Range. Sit down and listen up kiddies because the Five Ten Grandstone Climbing Shoe has some trad glory stories to tell. 109. These maps show the geologic formations and deposits in a region. Part or all of this report is presented in Portable Document Format (PDF); the latest version of Adobe Reader or similar software is required to view it. Creating a Digital Record – The Formation of Shenandoah National Park Posted on October 19, 2020 October 20, 2020 by Kristie Kendall Left image: J. Bernard and Ruby Bolen and family in front of their Rappahannock County home in the 1890s. The geology of the Shenandoah National Park region of Virginia was studied from 1995 to 2008. Shenandoah National Park Shenandoah National Park (Figure 14.11) is located in Virginia and was established as a National Park in 1935. Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. Refer to the, Download the latest version of Adobe Reader, free of charge. The geology tells of numerous historical occurrences on the surface and hidden underneath years of transformation. 35 p. Swarzenski, C.M. The scientific study of the origin, history, ... Catoctin Formation on Compton Peak, Shenandoah National Park.  US-Parks.com Inc. All Rights Reserved. I enjoyed this hike very much: not only does it lead to a good view, but it also leads to one of the most spectacular geological features of the park, a set of columnar basalt in the Catoctin Formation. U.S. Geological Survey Scientific Investigations Report 2004-5065. Between 1.2 and 1.0 billion years ago, ancient collisions of tectonic plates raised a great mountain range, named Grenville by geologists. East of the park, the Blue Ridge is an area of low relief similar to the physiography of the Piedmont province. Privacy Page Contact Information: Contact USGS Siliciclastic rocks are mostly west of the South Fork of the Shenandoah River and underlie Massanutten Mountain. Geologic Formations of Shenandoah National Park Badger, Robert, 1999, Geology Along Skyline Drive, 100 p. Heatwole, 1988, Guide to Shenandoah National Park and Skyline Drive, 226 p. Here is a wonderful link from the Northern Virginia Community College on the Geology of Shenandoah National Park 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. This stable scene ended violently around 570 million years ago, however, as the underlying tectonic plates began to move apart. Nonetheless, when the sky was cloudy, an intermingling of darker and lighter grays, Shenandoah glowed a lush and vigorous green. Doyle. Shenandoah is one of the oldest geological formations in the world. Close. There were no plants or animals, however, for these had not yet evolved from the primitive life just now beginning to flourish in the oceans. Accessibility Page Last Modified: Wednesday, 07-Dec-2016 22:00:15 EST, Contains: geospatial database. The Geological Formation Of Shenandoah The geologic story of Shenandoah National Park began 1 billion years ago. Hyer, K.E., 2007, Escherichia coli concentrations in recreational streams and backcountry drinking-water supplies in Shenandoah National Park, Virginia, 2005-2006. Description. The park’s caves have a long and interesting geologic history beginning 38 million ... Shenandoah National Park. These are mountains of the imagination. Freezing and thawing can result in rockfalls and spalling from cliff faces. And is told in many ways, ” said Amberson the plates reversed direction and moved apart this! Most of them are as old as 1-1.2 billion years ago, however, as the Catoctin Formation Park... And deposits in the highlands include colluvium and debris fans that there is no geologic activity at Shenandoah National (... Geoconservation and interpretation in the highlands include colluvium and debris fans are part of the Shenandoah River southeastward... 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To enjoy across Shenandoah National Park geological activity in Shenandoah they undoubtedly were and consists of Valley.