Boreholes were drilled in 2017 and 2018 in Redwell Basin, a headwater catchment underlain by mineralized and hydrothermally altered sedimentary rock in the Elk Mountains near the town of Crested Butte, Colorado. Site locations and drilling procedures are documented under the main page of this data release. Borehole geophysical data were collected in boreholes MW1, MW1UZ, and MW2.1 as open holes prior to well construction. Logging was performed by a combination of USGS and Mount Sopris Instruments (MW1) and University of Wyoming (MW1UZ and MW2.1) staff. Log types vary by well on the basis of available equipment, site limitations, and borehole conditions. In borehole MW1, log types include fluid temperature and conductivity,...
Multichannel Seismic-Reflection and Navigation Data Collected Using Sercel GI Guns and Geometrics GeoEel Digital Streamers During the Mid-Atlantic Resource Imaging Experiment (MATRIX), USGS Field Activity 2018-002-FA
In summer 2018, the U.S. Geological Survey partnered with the U.S Department of Energy and the Bureau of Ocean Energy Management to conduct the Mid-Atlantic Resources Imaging Experiment (MATRIX) as part of the U.S. Geological Survey Gas Hydrates Project. The field program objectives were to acquire high-resolution 2-dimensional multichannel seismic-reflection and split-beam echosounder data along the U.S Atlantic margin between North Carolina and New Jersey to determine the distribution of methane gas hydrates in below-sea floor sediments and investigate potential connections between gas hydrate dynamics and sea floor methane seepage. MATRIX field work was carried out between August 8 and August 28, 2018 on the...
Album caption: View from top of south end of Bear Mt., elevation 12,700 feet. Looking southwest. Engineer Mt. on the left. Terraces of Hermosa limestone and westward dip of rocks shown on intervening mountain. (Silverton Quad.) Colorado.
Album caption: Mt. Wrangell in action. From Twin Lakes, camp Sept. 21, four miles N. of Gakona. Looking S. 60 degrees E. 1902. Alaska. n.d. No index card available.
Album caption: Lodgment till, Yanks Pasture along Trapper Creek. Slope in lower left corner is part of lateral moraine that borders the stream course and is younger than the lodgment till. View is to southwest. Published as figure 17.
Frost polygons, north slope of Sheep Mountain, looking northeast toward rampart of conglomerate talus above the cliffs. Beaverhead County, Montana. nd.
Album caption: Frost polygons, north slope of Sheep Mountain, looking northeast toward rampart of conglomerate talus above the cliffs. The polygons are about 3 m across. Published as figure 21.
Album caption: Perseverance Mine, Juneau. Handwritten notes on photo: 495. Alaska Perseverance Gold Mine. Silver Bow Basin. Alaska.
Western Gulf Coastal Plain Louisiana Land Use and Land Cover ground truth observations from 2016 to 2017
Collaborative landscape conservation planning is largely limited by the quality of spatial data which can be applied to decision support tools to inform conservation decisions. Conservation entities across the Western Gulf Coastal Plain are taking a collaborative, strategic, landscape scale approach to conservation planning. This effort encourages communication and implementation of restoration and habitat enhancement actions within water sheds. Land cover datasets available within this geography hinder the efficiency of such efforts due to low resolution quality and limited details associated with land use categories. In collaboration with the Texas Parks and Wildlife Department and the Gulf Coast Prairie Landscape...
Handwritten names on album caption: H.T. Knight, Gerardi, Otterback, Burrows. Feb 20/17.
A point layer of sites known to be useful analogs for planetary science, such as impact craters, dunes, volcanoes, and other processes observed on bodies across the solar system.
Orthoimagery and elevation data derived from UAS imagery for Palmyra Atoll, USA 2016 (ver. 1.1, November 2020)
Point clouds, high resolution digital surface models (DSM), and high resolution orthoimagery of Palmyra Atoll, USA, were generated from aerial 3-color and 5-band imagery collected October 2016 using Unoccupied Aerial Systems (UAS, or "drones"). Data were processed in sections corresponsing to flight areas using photogrammetry to generate three-dimensional point clouds (.las) by identifying pixels from multiple images representing the same object and calculating the x, y, and z coordinates of that object/pixel. Point clouds for each section were processed to create DSMs (.tif) representing the continuous surface of the uppermost reflective surface (i.e., data have not been filtered for vegetation classes or height)....
Album caption: Hanging Valley of Cataract Creek, taken from north side of South Fork Mineral Creek at elevation of 10,700 feet. Bear Mountain mass to left. (Eastern border of Telluride Quad.) Colorado. Handwritten notes on album caption: San Juan Co., Colo. n.d. Note: See also sgw00066.
Horizontally bedded Algonkian quartzite crags on summit of gap just south of Snowdon Peak. Needle Mountain quadrangle, San Juan County, Colorado. n.d.
Album caption: Horizontally bedded Algonkian quartzite crags on summit of gap just south of Snowdon Peak, looking northwest. (Needle Mt. Quad.) Colorado. Handwritten notes on album caption: San Juan County, n.d. Note: See also sgw00063
Data for three-dimensional distribution of groundwater residence time metrics in the glaciated United States using metamodels trained on general numerical simulation models
Residence time distribution (RTD) is a critically important characteristic of groundwater flow systems; however, it cannot be measured directly. RTD can be inferred from tracer data with analytical models (few parameters) or with numerical models (many parameters). The second approach permits more variation in system properties but is used less frequently than the first because large-scale numerical models can be resource intensive. With the data and computer codes in this data release users can (1) reconstruct and run 115 General Simulation Models (GSMs) of groundwater flow, (2) calculate groundwater age metrics at selected GSM cells, (3) train a boosted regression tree model using the provided data, (4) predict...
Album caption: Animal Valley, Perrin Peak and Mtns., and Mancos shale Mesa Verde contact from E. bluff looking N. 50 deg. W. Colorado. n.d. No index card available.
Crossbedded Jefferson Dolostone, north of jeep trail northeast Keokirk Mountain. Beaverhead County, Montana. nd.
Album caption: Crossbedded Jefferson Dolostone, north of jeep trail northeast Keokirk Mountain. Published as figure 11B.
No caption. Handwritten date on album caption: Feb 15/17.
Album caption and Index card: Miller's quarry, showing disturbed Trenton Limestone strata, due to push of ice from right to left, i.e. NE-SW; NE 1/4, Sec. 12, T. 4 N., R. 10 E. Seen from southeast. Evansville quadrangle. Dane County, Wisconsin. August 1902.
The U.S. Geological Survey, in collaboration with American Rivers and other partners, conducted a monitoring program beginning in 2010 to track river response to a series of dam removals on the Patapsco River intended to restore anadromous fish habitat in the watershed. Dam removals included the November 2010 removal of the Simkins dam, a 3.3 m tall and 66 m wide dam, with a reservoir sediment volume of ~67,000 cubic meters. As part of the dam removal monitoring program, three USGS streamgaging stations were established in late 2010 along the mainstem of the Patapsco River to estimate flow and suspended sediment-transport for constraining sediment budgets. USGS 01589000 Patapsco River at Hollofield, MD was reestablished...