Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 9.0, November 2023)

Comma-separated values (.csv) file containing data related to mercury concentrations in dragonfly samples from U.S. National Parks collected as part of the Dragonfly Mercury Project (DMP). This data release supersedes Eagles-Smith, C.A., Nelson, S.J., Flanagan-Pritz, C.M., Willacker Jr., J.J., and Klemmer, A.J., 2018, Total mercury concentrations in dragonfly larvae from U.S. national parks (ver. 8.0, December 2022): U.S. Geological Survey data release, https://doi.org/10.5066/P9TK6NPT. Please contact fresc_outreach@usgs.gov for access.

Categories: Data, Data Release - Revised; Tags: Acadia National Park, Allegheny Portage Railroad National Historic Site, Amistad National Recreation Area, Apostle Islands National Lakeshore, Appomattox Court House National Historical Park, All tags... Aquatic Biology, Assateague Island National Seashore, Battle Creek Cypress Swamp, Bear Creek Lake Park, Bear Meadows Natural Area, Big Bend National Park, Big Cypress National Preserve, Big Thicket National Preserve, Buffalo National River, Cape Cod National Seashore, Capitol Reef National Park, Carl Sandburg Home National Historic Site, Carlsbad Caverns National Park, Channel Islands National Park, Chattahoochee River National Recreation Area, Chickasaw National Recreation Area, City of Rocks National Reserve, Colorado National Monument, Congaree National Park, Crater Lake National Park, Craters of the Moon National Monument & Preserve, Cuyahoga Valley National Park, Death Valley National Park, Delaware Water Gap National Recreation Area, Denali National Park and Preserve, Devils Tower National Monument, East Inlet Natural Area-Connecticut Lakes Nature Preserve, Ecology, Ell Pond Preserve, Everglades National Park, Fort Larned National Historic Site, Fort Worth Nature Center and Refuge National Natural Landmark, Gateway National Recreation Area, Glacier Bay National Park & Preserve, Glacier National Park, Glen Canyon National Recreation Area, Golden Gate National Recreation Area, Grand Canyon National Park, Grand Portage National Monument, Grand Teton National Park, Great Basin National Park, Great Sand Dunes National Park, Great Smoky Mountains National Park, Gulf Islands National Seashore, Hawaii Volcanoes National Park, Homestead National Monument, Horseshoe Bend National Military Park, Hot Springs National Park, Indiana Dunes National Park, Isle Royale National Park, Jean Lafitte National Historical Park and Preserve, John Day Fossil Beds National Monument, Joshua Tree National Park, Katahdin Woods and Waters National Monument, Katmai National Park and Preserve, Kenai Fjords National Park, Kenilworth Park & Aquatic Gardens, Klondike Gold Rush National Historical Park, Knife River Indian Villages National Historic Site, Lake Clark National Park and Preserve, Lassen Volcanic National Park, Lewis and Clark National Historical Park, Lilley Cornett Woods, Mammoth Cave National Park, Marsh-Billings-Rockefeller National Park, Maurice National Wild and Scenic River, Minute Man National Historical Park, Mississippi National River & Recreation Area, Monocacy National Battlefield, Montezuma Castle National Monument, Mount Rainier National Park, Natchez Trace Parkway and National Scenic Trail, New River Gorge National Park and Preserve, Niobrara National Scenic River, North Cascades National Park, Ocmulgee Mounds National Historical Park, Olympic National Park, Oregon Caves National Monument, Ozark National Scenic Riverway, Padre Island National Seashore, Petersburg National Battlefield, Pictured Rocks National Lakeshore, Pinnacles National Park, Pipestone National Monument, Prince William Forest Park, Pu'ukohola Heiau National Historic Site, Redwood National Park, Richmond National Battlefield Park, Rio Grande Wild & Scenic River, Rock Creek Park, Rocky Mountain National Park, Roosevelt-Vanderbilt National Historic Sites, Saguaro National Park, Saint Croix National Scenic Riverway, Saint-Gaudens National Historic Site, San Juan Island National Historical Park, Santa Monica Mountains National Recreation Area, Sequoia & Kings Canyon National Parks, Shenandoah National Park, Sleeping Bear Dunes National Lakeshore, Sudbury, Assabet & Concord Wild & Scenic Rivers, Tallgrass Prairie National Preserve, Timucuan Ecological Historic Preserve, Tumacacori National Historical Park, Tuzigoot National Monument, USGS Science Data Catalog (SDC), Upper Delaware Scenic and Recreational River, Valles Caldera National Preserve, Voyageurs National Park, Water Quality, Weir Farm National Historical Park, Wekiva Wild & Scenic River, White Mountain National Forest, Wildlife Biology, Wind Cave National Park, Women’s Rights National Historical Park, Yellowstone National Park, Yosemite National Park, Zion National Park, biota, environment, mercury contamination, Fewer tags

USGS EcoDrought Stream Discharge, Gage Height, and Water Temperature in Shenandoah National Park, Virginia (ver. 2.0, November 2023)

The U.S. Geological Survey (USGS) Water Mission Area (WMA) - Ecosystems Mission Area (EMA) EcoDrought project is comprised of interdisciplinary teams in five pilot regions across the country. The over-arching project goal is to measure streamflow in headwater streams and to relate flow variation to stream fish population dynamics. For the catchments located in Shenandoah National Park, Virginia, the Virginia/West Virginia Science Center and the New England Water Science Center (NewEngWSC) partnered with the fish ecology group at Leetown Science Center, a part of the EMA’s Eastern Ecological Science Center, in order to establish gaging stations in headwater streams with ongoing ecological data collection and modeling...

Categories: Data; Tags: Shenandoah National Park, USGS Science Data Catalog (SDC), Virginia, biota, climate change, All tags... drought, fragmentation, gaging station, groundwater, headwater, precipitation, stream discharge, stream water temperature, Fewer tags

Sawed slab of amygdaloid breccia. Shenandoah National Park, Virginia.

Shenandoah National Park, Virginia. Sawed slab of amygdaloid breccia. Slab is from the outcrop on the south side of the road about 500 feet southeast of Big Meadows Lodge. The angular blocks are probably pieces of frothy lava crust that formed at the top of the flow. The crust was broken by continued movement of the still-molten lava beneath, and jumbled pieces were rafted along and were eventually frozen in place when the flow came to rest and solidified. During later metamorphism the amygdules and some of the interstices between the blocks were filled with white quartz and yellow-green epidote. Locally, part of the rock has been altered to epidosite, a fine- grained light-green aggregate of epidote and quartz....

Categories: Image; Tags: National Parks, Photographers, Reed, J.C. Collection, Shenandoah National Park, Shenandoah National Park, All tags... photo print, Fewer tags

Mercury and biogeochemical parameters in surface water and sediment from U.S. National Parks, 2014-2015 (ver. 2.0, December 2023)

Comma-separated values (.csv) file containing data related to mercury and biogeochemical parameters in surface water and aquatic sediment collected from U.S. National Parks in 2014-2015.

Categories: Data, Data Release - Revised; Tags: Acadia National Park, Big Bend National Park, Big Cypress National Park, Big Thicket National Preserve, Cape Cod National Seashore, All tags... Chickasaw National Recreation Area, Cuyahoga Valley National Park, Denali National Park and Preserve, Glacier National Park, Great Smoky Mountains National Park, Gulf Islands National Seashore, Indiana Dunes National Park, John Day Fossil Beds National Monument, Knife River Indian Villages National Historic Site, Lake Clark National Park and Preserve, Mammoth Cave National Park, Marsh-Billings-Rockefeller National Park, Montezuma Castle National Monument, Mount Rainier National Park, Niobrara National Scenic River, Olympic National Park, Ozark National Scenic Riverway, Pictured Rocks National Lakeshore, Pipestone National Monument, Redwood National Park, Rocky Mountain National Park, Roosevelt-Vanderbilt National Historic Sites, Saguaro National Park, Saint-Gaudens National Historic Site, Shenandoah National Park, Tallgrass Prairie National Preserve, Timucuan Ecological & Historic Preserve, Tumacacori National Historical Park, Tuzigoot National Monument, USGS Science Data Catalog (SDC), USGS:637e5e47d34ed907bf769345, Valles Caldera National Preserve, Voyageurs National Park, Yellowstone National Park, Yosemite National Park, environment, inlandWaters, mercury contamination, Fewer tags

Blue Ridge, viewed from the west. Shenandoah National Park, Virginia. No Date.

Shenandoah National Park, Virginia. Blue Ridge, viewed from the west. The flat fertile valley floor (foreground) is underlain by limestone of the Paleozoic age capped by terrace gravel. The low wooded foothills (middle distance) are underlain by steeply dipping quartzite and shale of the Chilhowee Group. The main mass of the Blue Ridge is composed of granitic basement rocks, but the highest part of the ridge is capped by greenstone of the Catoctin Formation. Photo by U.S. National Park Service. Figure 1, U.S. Geological Survey Bulletin 1265.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Photographers, Reed, J.C. Collection, Shenandoah National Park, Virginia, All tags... photo print, Fewer tags

Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Shenandoah National Park, Virginia. No date.

Shenandoah National Park, Virginia. Schistose greenstone along the Appalachian Trail at the base of Little Stony Man Cliffs. Here, a zone of breccia and schistose greenstone marks the boundary between the second and third flows above the base of the Catoctin Formation. The outcrop is approximately 3 feet high. Figure 7, U.S. Geological Survey Bulletin 1265.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Photographers, Reed, J.C. Collection, Shenandoah National Park, Shenandoah National Park, Virginia, All tags... photo print, Fewer tags

Columnar jointing in greenstone. Shenandoah National Park, Virginia. No date.

Shenandoah National Park, Virginia. Columnar jointing in greenstone. Large column along the Appalachian Trail about 200 feet south of Little Stony Man parking area. The column is cut by cleavage which dips east, away from the observer. The segment of the coluiai above each cleavage plane is offset westward from the segment beneath as a result of movement during formation of the cleavage. Column is approximately 2 feet in diameter. Figure 9 (right), U.S. Geological Survey Bulletin 1265.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Photographers, Reed, J.C. Collection, Shenandoah National Park, Shenandoah National Park, Virginia, All tags... photo print, Fewer tags

Abiotic and biotic factors reduce viability of a high-elevation salamander in its native range

Includes data used to estimate population demographic parameters for an exemplary high-elevation amphibian species, the federally endangered Shenandoah salamander (Plethodon shenandoah). These parameters were entered into a Markov projection model which we used to forecast the future population status of the Shenandoah salamander.

Categories: Data; Tags: Ecology, Shenandoah National Park, USGS Science Data Catalog (SDC), Wildlife Biology, Wildlife Biology, All tags... amphibian, persistence, population, salamander, Fewer tags

Modeled temperature data developed for study of shallow mountain bedrock limits seepage-based headwater climate refugia, Shenandoah National Park, Virginia: U.S. Geological Survey data release

1D transient numerical simulations with a modified version of the SUTRA model (preliminary code) that accounts for variably-saturated freeze-thaw dynamics (e.g. McKenzie and Voss, 2013) to predict annual alluvial aquifer temperature dynamics using coupled fluid and heat transport physics. The model simulations were run with a modified version of SUTRA_ICE (unreleased) that accomadates a time-variable sinusiodal upper temperature boundary. This data release also includes the source code and Argus One GUI files used to build the models, though this proprietary software is not needed to run the models as described in the upper-level "readme" file.

Tags: Groundwater, InlandWaters, NSDI, SUTRA, SUTRA-ice, All tags... Shenandoah National Park, Surface Water, Thermal, USGS Science Data Catalog (SDC), Virginia, environment, geoscientificInformation, inlandWaters, refugia, Fewer tags

Greenstone dike in basement rocks. Shenandoah National Park, Page County, Virginia. No Date.

Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike on Ridge Trail, Old Rag Mountain, about O.4 mile northeast of the summit. Wallrock is Old Rag Granite of Furcron (1934). Figure 15 (left), U.S. Geological Survey Bulletin 1265.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Page County, Virginia, Photographers, Reed, J.C. Collection, Shenandoah National Park, All tags... photo print, Fewer tags

An updated range map for Plethodon shenandoah

The Shenanadoah Salamander (Plethodon shenandoah) is an endangered salamander found only in the mountains of Shenandoah National Park. Field surveys of the salamander were conducted from 2007-2022 using daytime cover object surveys. In order to capture the totality of P. shendandoah’s range we sampled from low to high elevation across a broad geographic range. We created a spatial generalized additive model with aspect, latitude, longitude, and elevation and heat load index (HLI) to predict salamander occupancy and create a new range map based on our extended surveys. All spatial covariates were extracted from a 15m digital elevation model layer of Shenandoah National Park. Temperature and precipitaiton data were...

Categories: Data; Tags: Shenandoah National Park, USGS Science Data Catalog (SDC), amphibian, none, range map, All tags... salamander, Fewer tags

Greenstone dike in basement rocks. Shenandoah National Park, Page County, Virginia. No Date.

Shenandoah National Park, Virginia. Greenstone dike in basement rocks. Dike at the west side of the north portal of Marys Rock Tunnel, mile 32.1, Skyline Drive. Wallrock is granodiorite. Figure 15 (right), U.S, Geological Survey Bulletin 1265.

Categories: Image; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: National Parks, Page County, Virginia, Photographers, Reed, J.C. Collection, Shenandoah National Park, All tags... photo print, Fewer tags