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XYZ files of LiDAR and sonar data collected at Lake Superior at Minnesota Point, Duluth, MN, August 2019 This dataset is comprised of three files containing northing, easting, and elevation ("XYZ") information for light detection and ranging (LiDAR) data representing beach topography and sonar data representing near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, Minnesota. The point data is the same as that in LAS (industry-standard binary format for storing large point clouds) files that were used to create a digital elevation model (DEM) of the approximately 5.9 square kilometer (2.3 square mile) surveyed area. LiDAR data were collected August 10, 2019 using a boat-mounted Optech ILRIS scanner and methodology similar to that described by Huizinga and Wagner (2019). Multi-beam sonar data were collected... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, DEM, Duluth, Great Lakes, Hydroacoustic, All tags... LAS, Lake Superior, LiDAR, Southwestern Lake Superior, Superior, XYZ, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, sonar, Fewer tags High-resolution spatial water-quality and discrete phytoplankton data, Owasco Lake, Seneca Lake, and Skaneateles Lake, Finger Lakes Region, New York, 2018-2019 From August 2018 to October 2019, the U.S. Geological Survey collected spatially high-resolution water quality data as part of five shoreline synoptic surveys around the perimeters of Owasco, Seneca, and Skaneateles Lakes within the Finger Lakes Region of New York. Water-quality data were collected just below water surface utilizing YSI EXO2 multiparameter sondes and portable nitrate sensors paired with real-time GPS data as part of a HABs monitoring program in the Finger Lakes. In October 2019, water-quality data collection was paired with discrete phytoplankton grab samples on Owasco Lake and Seneca Lake. Phytoplankton grab samples were collected just below water surface with a peristaltic pump at twelve locations... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Contaminants, HABS, Finger Lakes, Limnology, New York, All tags... Owasco Lake, Seneca Lake, Skaneateles Lake, Surface-Water Quality Monitoring, USGS Science Data Catalog (SDC), United States, Water Quality, Water Quality, Water Resources, algae, algal blooms, chlorophyll, class, continuously-measured, cyanobacteria, dissolved oxygen, division, family, fluorescent dissolved organic matter (fDOM), freshwater (surface), genus, hazards, lake ecosystems, limnology, nitrate, nutrient content (water), order, oxygen content (water), phycocyanin, phycology, phytoplankton, spatial, species, specific conductance, surface water quality, synoptic, taxa, taxonomy, turbidity, water pH, water temperature, Fewer tags Geochemical, grain size, lithological, bathymetric, reconstructed integrated vapor transport, and age model data for Leonard Lake, Mendocino County The data herein are geochemical (from X-Ray fluorescence spectrometry), grain size (percent clay, silt, sand), lithological (loss on ignition data), bathymetric, reconstructed IVT, and radioactive isotopes (14-C, 210-Pb, 226-Ra, and 137-Cs). These data were collected from sediments from Leonard Lake, Mendocino County, California, USA starting in 2014. Together, these data provide evidence for a record of extreme precipitation going back three millennia, showing regional pluvial and drought cycles. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: California, Climatology, Geography, Hydrology, Limnology, All tags... USGS Science Data Catalog (SDC), biota, ecology, flooding, Fewer tags Minnesota Point: Survey area of beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, MN, July 2020 This dataset is the survey area footprint for the beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, Minnesota. The survey footprint represents a LAS dataset of terrestrial light detection and ranging (lidar) of beach topography and multibeam sonar bathymetry to approximately 1 kilometer (0.62 miles) offshore, for an approximately 2.27 square kilometer surveyed area. The surveys were completed July 20 - July 23, 2020. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags LAS dataset of lidar, single-beam, and multibeam sonar data collected of Minnesota Point near the Superior Entry of Lake Superior, Duluth, MN, September 2021 This dataset is a LAS dataset containing light detection and ranging (lidar) data and sonar data representing the beach and near-shore topography of Minnesota Point near the Superior Entry of Lake Superior, Duluth, Minnesota. The LAS data sets were used to create a digital elevation model (DEM) of the approximately 2.27 square kilometer surveyed area. Lidar data were collected using a boat mounted Velodyne unit. Multibeam sonar data were collected using a Norbit integrated wide band multibeam system compact (iWBMSc) sonar unit. Single-beam sonar data were collected using a Ceescope sonar unit. All elevation data were collected September 15-17, 2021. Methodology similar to Wagner, D.M., Lund, J.W., and Sanks, K.M.,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, MN, August 2019 This dataset is a digital elevation model (DEM) of the beach topography and near-shore bathymetry of Lake Superior at Minnesota Point, Duluth, Minnesota. The DEM has a 10-meter (m; 32.8084 feet) cell size and was created from a LAS (industry-standard binary format for storing large point clouds) dataset of terrestrial light detection and ranging (LiDAR) data representing the beach topography and sonar data representing the bathymetry to approximately 1.3 kilometers (0.8 miles) offshore. Average point spacing of the LAS files in the dataset are as follows: LiDAR, 0.137 m; multi-beam sonar, 1.029 m; single-beam sonar, 0.999 m. LiDAR data were collected August 10, 2019 using a boat-mounted Optech ILRIS scanner and... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, DEM, Duluth, Geomorphology, Great Lakes, All tags... Hydroacoustic, LAS, Lake Superior, LiDAR, Sedimentology, Southwestern Lake Superior, Superior, USGS Science Data Catalog (SDC), Water Resources, XYZ, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, sonar, Fewer tags Bathymetry and Storage Capacity of Blue Mountain Lake, Arkansas. A bathymetric survey of Blue Mountain Lake, Arkansas, was conducted in May 2017 by the Lower Mississippi-Gulf Water Science Center of the U.S. Geological Survey (USGS) using methodologies for sonar surveys similar to those described by Wilson and Richards (2006). Point data from the bathymetric survey were merged with point data from an aerial LiDAR survey conducted in December 2010 for the U.S. Army Corps of Engineers (USACE), Little Rock District. From the combined point data, a terrain dataset (a type of triangulated irregular network, or TIN model) was created in Esri ArcGIS for the lakebed within the extent of pool elevation 420 feet above the North American Vertical Datum of 1988 (NAVD88). Products included... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, LIDAR, USGS Science Data Catalog (SDC), digital elevation models, elevation, All tags... inlandWaters, limnology, Fewer tags LAS dataset of lidar, single-beam and multibeam sonar data collected at Lake Superior at Minnesota Point near the Duluth Entry, Duluth, MN, August 2022 This dataset is a LAS (industry-standard binary format for storing lidar point clouds) dataset containing light detection and ranging (lidar) data and sonar data representing the beach and near-shore topography of Lake Superior at Minnesota Point, near the Duluth entry, Duluth, Minnesota. Average point spacing of the LAS files in the dataset are as follows: lidar, 0.094 meters (m); multibeam sonar, 0.501 m; single-beam sonar, 1.876 m. The LAS dataset was used to create digital elevation models (DEMs) of 10 m (32.8084 feet) and 1 m (3.28084 feet) resolution, of the approximate 1.75 square kilometer surveyed area. Lidar data were collected August 22, 2022 using a boat mounted Velodyne VLP-16 unit and methodology similar... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, DEM, Duluth, Great Lakes, Hydroacoustic, All tags... LAS, Lake Superior, Lidar, Sonar, Southwestern Lake Superior, Superior, XYZ, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Owasco Lake, New York, phytoplankton data, October 8, 2019 This child item data set provides phytoplankton data collected from Owasco Lake, New York, on October 8, 2019. Phytoplankton were identified to the lowest possible taxonomic level, and abundance (density reported as both natural units and cells) and biovolume are reported. All data are reported as raw calculated values. This dataset includes all routine and quality assurance/quality control samples collected at twelve sampling locations on Owasco Lake. Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Class, Contaminants, HABS, Division, Family, Finger Lakes, All tags... Genus, New York, Order, Owasco Lake, Owasco Lake near Adams Point NY (USGS Station ID: 424816076293103), Owasco Lake near Dutch Hollow Brook NY (USGS Station ID: 425138076304302), Owasco Lake near Ensenore Rd. NY (USGS Station ID: 424743076301301), Owasco Lake near Fire Lane 26 NY (USGS Station ID: 424929076311501), Owasco Lake near Glenwood Beach NY (USGS Station ID: 424833076304901), Owasco Lake near Indian Cove NY (USGS Station ID: 424616076280804), Owasco Lake near Owasco Inlet NY (USGS Station ID: 0423532505), Owasco Lake near Seward Point NY (USGS Station ID: 424738076290701), Owasco Lake near Sucker Brook NY (USGS Station ID: 425403076314201), Owasco Lake near Unnamed Trib. 12 NY (USGS Station ID: 424629076292701), Owasco Lake near Veness Brook NY (USGS Station ID: 425326076325401), Owasco Lake near Willow Point NY (USGS Station ID: 424645076294501), Species, Surface-Water Quality Monitoring, Taxa, Taxonomy, United States, Water Quality, algae, algal blooms, cyanobacteria, freshwater (surface), hazards, lake ecosystems, limnology, phycology, phytoplankton, Fewer tags Bathymetric Data Collection for Larimore Dam in North Dakota, August 2020 Data were collected in August, 2020 to support development of a bathymetric map for Larimore Dam in Grand Forks County, North Dakota. Global Navigation Satellite System (GNSS) surveying equipment was used in static and real-time kinematic (RTK) mode to establish a local reference mark and check-in/check-out point, to collect water surface elevations, and to collect topographic points along established data collection transects. Topographic points were collected on land, in water too shallow for boating, and in areas of the lake where thick aquatic vegetation prohibited use of an echosounder and transducer. In areas of the lake deep enough for boating and where aquatic vegetation was not present, depth data was collected... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry, Grand Forks County, Larimore Dam, Limnology, North Dakota, All tags... Sedimentation, USGS Science Data Catalog (SDC), Water Resources, Fewer tags LAS dataset of LiDAR and sonar data collected at Lake Superior at Minnesota Point, Duluth, MN, August 2019 This dataset is a LAS (industry-standard binary format for storing large point clouds) dataset containing light detection and ranging (LiDAR) data and sonar data representing the beach and near-shore topography of Lake Superior at Minnesota Point, Duluth, Minnesota. Average point spacing of the LAS files in the dataset are as follows: LiDAR, 0.137 meters (m); multi-beam sonar, 1.029 m; single-beam sonar, 0.999 m. The LAS dataset was used to create a 10-m (32.8084 feet) digital elevation model (DEM) of the approximately 5.9 square kilometer (2.3 square mile) surveyed area using the "LAS dataset to raster" tool in Esri ArcGIS, version 10.7. LiDAR data were collected August 10, 2019 using a boat-mounted Optech ILRIS... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Bathymetry and Elevation, DEM, Duluth, Great Lakes, Hydroacoustic, All tags... LAS, Lake Superior, LiDAR, Southwestern Lake Superior, Superior, XYZ, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, sonar, Fewer tags Data points, corresponding to the bathymetric survey of Puerto Mosquito, Isla de Vieques, Puerto Rico, August 2015 This dataset consists of a shapefile of points corresponding to water depth collected for the bathymetric survey of Puerto Mosquito, in Isla de Vieques, Puerto Rico, on August 11, 2015. The U.S. Geological Survey, in cooperation with the Puerto Rico Environmental Quality Board, conducted a limnological study at Puerto Mosquito in Vieques to assess the principal mechanisms affecting the hydrology and water quality characteristics. The study characterized hydrologic and physical-chemical properties, sediment deposition rates, bathymetry, and biological conditions. The bathymetric survey system used for the study consisted of coupling a global positioning system (GPS) device with a water depth sounder. Established... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service, Shapefile; Tags: Puerto Mosquito, Puerto Rico, Storage volume, Vieques, bathymetry, All tags... limnology, ocean sciences, Fewer tags Part 4 – Photographs of sediment cores collected in 2018 from Lake Powell, Utah This section of the data release includes core images in the format of photos (JPG) that have been compressed into a zipped file (2018LakePowellCoring_CorePhotos.zip). It is Part 4 (of four) in this data release and contains images of the cleaned archival half from split cores as they appeared immediately after splitting (late March and early April 2019). Each photo includes a ruler (in centimeters) and X-Rite ColorChecker Classic color correction card that may be used for corrections. Drillhole information, such as location and total recovery, are outlined in “Part 1 – Drillhole information from the 2018 coring project in Lake Powell, Utah” (2018LakePowellCoring_DrillholeInfo.csv) of this data release. Each drillhole... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Animas River, Antelope Canyon, Bears Ears National Monument, Bullfrog, Bullfrog Bay, All tags... Canyonlands National Park, Capitol Reef National Park, Castle Butte, Cataract Canyon, Cha Bay, Cha Canyon, Coconino County, Colorado River, Dangling Rope, Deep Canyon, Dirty Devil River, Escalante River, Farley Canyon, Fourmile Canyon, Friendship Bay, Garfield County, Glen Canyon Dam, Glen Canyon National Recreation Area, Gold King Mine, Good Hope Bay, Grand Staircase-Escalante National Monument, Great Bend, Gunsight bay, Halls Bay, Halls Crossing, Hite, Hole in the Rock, Kane County, Lake Powell, Last Chance Bay, Mexican Hat, Monument Valley, Narrow Canyon, Navajo Canyon, Neshkahi Wash, North Wash, Padre Bay, Page, Piuite Canyon, Piute Farms Wash, Piute Mesa, Piute Wash, Rainbow Bridge National Monument, Reflection Canyon, Rincon, Rock Creek Bay, San Juan County, San Juan River, Silverton, State of Arizona, State of Utah, The Horn, Trachyte Canyon, Twomile Canyon, United States of America, Wahweap, Wahweap Bay, Warm Creek Bay, White Canyon, Wilson Mesa, Zahn Bay, bathymetry, bedforms, bulk density, clay deposits, contaminant transport, contamination and pollution, core analysis, dissolved metals, drilling and coring, field inventory and monitoring, geomorphology, gravel deposits, groundwater and surface-water interaction, hazards, human environmental safety, hydrogeology, hydrologic processes, hydrology, image analysis, industrial pollution, lakebed characteristics, lidar, limnology, magnetic susceptibility analysis, mine drainage, mine waste, national centers, partnerships, photography, piston coring, recreation, remediation, resistivity, rotary coring, sample repositories, sand deposits, sedimentation, sedimentology, sediment transport, soil horizons, spectrophotometry, stratigraphic sections, stratigraphic thickness, stratigraphy, stream-gage measurement, streamflow, surface-water level, surface water (non-marine), surface water quality, suspended material, toxic trace element contamination, turbidity, unconsolidated deposits, water circulation, water resources, water supply and demand, Fewer tags USGS Earthmap Capacity Assessment Dataset The U.S. Geological Survey provides a wide range of scientific information to an even wider group of stakeholders. Understanding what capacities are needed and if and or where these capacities exist across the USGS landscape is critical in moving science to the next level of use, implementation, and visualization. The concept behind the groups organized to conduct and interpret the survey that collected these data took advantage of the USGS’s position as a science organization with expertise spanning a wide range of science disciplines, stakeholders, and responsibilities. A survey was conducted of USGS employees (Sep 20-Nov 20) to get a current sample of the capacities that exist across the USGS. Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Aquatic Biology, Botany, Climatology, Ecology, Economic Geology, All tags... Energy Resources, Environmental Health, Forestry, Genetics, Geochemistry, Geography, Geomorphology, Geophysics, Glaciology, Hydrology, Information Sciences, Land Use Change, Limnology, Marine Geology, Mineral Resources, Planetary Sciences, Remote Sensing, Sedimentology, Seismology, Soil Sciences, Stratigraphy, Structural Geology, USGS Science Data Catalog (SDC), United States, Volcanology, Water Quality, Water Resources, Wildlife Biology, Wildlife Disease, capability, capacity, survey, Fewer tags LAS dataset of lidar, single-beam, and multibeam data collected of Minnesota Point near the Duluth Entry of Lake Superior, Duluth, MN, October 2021 This dataset is a LAS dataset containing light detection and ranging (lidar) data and multibeam sonar data representing the beach topography and near-shore bathymetry of Minnesota Point near the Duluth Entry of Lake Superior, Duluth, Minnesota. The LAS data were used to create a digital elevation model (DEM) of the approximate 1.87 square kilometer surveyed area. Lidar data were collected using a boat mounted Velodyne VLP-16 unit. Multibeam sonar data were collected using a Norbit integrated wide band multibeam system compact (iWBMSc) sonar unit. Single-beam sonar data were collected using a Ceescope sonar unit. All elevation data were collected October 5-11, 2021. Methodology similar to Wagner, D.M., Lund, J.W.,... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, Duluth, Great Lakes, Lake Superior, Southwestern Lake Superior, All tags... Superior, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Bathymetry and Storage Capacity of Nimrod Lake, Arkansas A bathymetric survey of Nimrod Lake, Arkansas, was conducted in late April to mid-May, 2016, by the Lower Mississippi-Gulf Water Science Center (LMG WSC) of the U.S. Geological Survey (USGS) using methodologies for sonar surveys similar to those described by Wilson and Richards (2006) and Richards and Huizinga (2018). Point data from the bathymetric survey were merged with point data from an aerial LiDAR survey conducted in December, 2010, that were provided by the U.S. Army Corps of Engineers (USACE), Little Rock District. From the combined point dataset, a terrain dataset (a type of triangulated irregular network, or TIN, model) was created in Esri ArcGIS, version 10.5, for the area within the approximate extent... Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: ADCP, AR, ASCII, Acoustic, Arkansas, All tags... Bathymetry and Elevation, Doppler, GNIS ID 75802, LIDAR, Nimrod Lake, Perry County, USGS Science Data Catalog (SDC), Water Depth, XYZ, Yell County, digital terrain models, elevation, inlandWaters, limnology, sonar, terrain dataset, Fewer tags LAS dataset of lidar, single-beam, and multibeam sonar data collected at Lake Superior at Minnesota Point near the Duluth Entry, Duluth, MN, October-November 2022 This dataset is a LAS (industry-standard binary format for storing lidar point clouds) dataset containing light detection and ranging (lidar) data and sonar data representing the beach and near-shore bathymetry of Lake Superior at Minnesota Point, near the Duluth entry, Duluth, Minnesota. Average point spacing of the LAS files in the dataset are as follows: lidar, 0.055 meters (m); multibeam sonar, 0.511 m; single-beam sonar, 1.687 m. The LAS dataset was used to create digital elevation models (DEMs) of 10 m (32.8084 feet) and 1 m (3.28084 feet) cell size, of the approximate 1.78 square kilometer surveyed area. Lidar data were collected November 01, 2022 using a boat mounted Velodyne VLP-16 unit and methodology... Categories: Data; Types: Downloadable, Map Service, OGC WFS Layer, OGC WMS Layer, Shapefile; Tags: Bathymetry and Elevation, DEM, Duluth, Great Lakes, Hydroacoustic, All tags... LAS, Lake Superior, Lidar, Sonar, Southwestern Lake Superior, Superior, XYZ, bathymetry, digital elevation models, elevation, inlandWaters, lidar, limnology, Fewer tags Concentrations of Per- and Polyfluoroalkyl Substances (PFAS) in Lake-Bottom Sediments of Ashumet Pond on Cape Cod, Massachusetts, 2020 (ver. 2.0, February 2024) Lake-bottom sediment and associated quality-control samples were collected in August 2020 from one coring location (U.S. Geological Survey station 413756070321301, ASHUMET POND, MASHPEE MI-ASHPD-0011) in Ashumet Pond downgradient from a former fire-training area on Cape Cod, Massachusetts. The core was collected to determine if per- and polyfluoroalkyl substances (PFAS) were present in the bottom sediments of a lake known to have elevated concentrations of PFAS in surface water and groundwater (Tokranov and others, 2021), and whether the sediments could act as a continuous source of PFAS to the lake. Processing the sediment core entailed collection of discrete samples at intervals ranging from 1-5 centimeters (cm)... Categories: Data, Data Release - Revised; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Cape Cod, Eastern United States, Environmental Health, Falmouth, Hydrology, All tags... Mashpee, Massachusetts, PFAS, Sandwich, Sedimentology, USGS Science Data Catalog (SDC), Water Quality, chemical analysis, environment, grain-size analysis, hydrogeology, limnology, radiometric dating, sedimentation, vibracoring, Fewer tags Part 1 – Drillhole information from the 2018 coring project in Lake Powell, Utah This section of the data release includes drillhole information in the format of a comma-separated value (CSV) file (2018LakePowellCoring_DrillholeInfo.csv). It is Part 1 (of four) in this data release and represents the broadest hierarchical information on the dataset including the drillhole name, location, water depth, sediments top and bottom, drillhole depth, and recovery for each coring location. Each drillhole comprises multiple cores which are outlined in “Part 2 – Core and core section information from the 2018 coring project in Lake Powell, Utah” (2018LakePowellCoring_CoreSectionInfo.csv) of this data release. Core logs and spectrophotometry data are available in “Part 3 – Multi-Sensor Core Logger and spectrophotometry... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Animas River, Antelope Canyon, Bears Ears National Monument, Bullfrog, Bullfrog Bay, All tags... Canyonlands National Park, Capitol Reef National Park, Castle Butte, Cataract Canyon, Cha Bay, Cha Canyon, Coconino County, Colorado River, Dangling Rope, Deep Canyon, Dirty Devil River, Escalante River, Farley Canyon, Fourmile Canyon, Friendship Bay, Garfield County, Glen Canyon Dam, Glen Canyon National Recreation Area, Gold King Mine, Good Hope Bay, Grand Staircase-Escalante National Monument, Great Bend, Gunsight bay, Halls Bay, Halls Crossing, Hite, Hole in the Rock, Kane County, Lake Powell, Last Chance Bay, Mexican Hat, Monument Valley, Narrow Canyon, Navajo Canyon, Neshkahi Wash, North Wash, Padre Bay, Page, Piuite Canyon, Piute Farms Wash, Piute Mesa, Piute Wash, Rainbow Bridge National Monument, Reflection Canyon, Rincon, Rock Creek Bay, San Juan County, San Juan River, Silverton, State of Arizona, State of Utah, The Horn, Trachyte Canyon, Twomile Canyon, United States of America, Wahweap, Wahweap Bay, Warm Creek Bay, White Canyon, Wilson Mesa, Zahn Bay, bathymetry, bedforms, bulk density, clay deposits, contaminant transport, contamination and pollution, core analysis, dissolved metals, drilling and coring, field inventory and monitoring, geomorphology, gravel deposits, groundwater and surface-water interaction, hazards, human environmental safety, hydrogeology, hydrologic processes, hydrology, image analysis, industrial pollution, lakebed characteristics, lidar, limnology, magnetic susceptibility analysis, mine drainage, mine waste, national centers, partnerships, photography, piston coring, recreation, remediation, resistivity, rotary coring, sample repositories, sand deposits, sedimentation, sedimentology, sediment transport, soil horizons, spectrophotometry, stratigraphic sections, stratigraphic thickness, stratigraphy, stream-gage measurement, streamflow, surface-water level, surface water (non-marine), surface water quality, suspended material, toxic trace element contamination, turbidity, unconsolidated deposits, water circulation, water resources, water supply and demand, Fewer tags Data Release for Holocene Paleohydrology from alpine lake sediment, Emerald Lake, Wasatch Plateau of central Utah, USA Holocene sediments at Emerald Lake in central Utah (3090 m a.s.l), document the paleohydroclimatic history of the western Upper Colorado River headwater region. Multi-proxy analyses of sediment composition, mineralogy, and stable isotopes of carbonate (d18O and d13C) show changes in effective moisture for the past ca. 10,000 years at millennial to decadal timescales. Emerald Lake originated as a shallow closed-basin cirque pond during the early Holocene. By ca. 7000 cal yr BP, higher lake levels and carbonate d18O values indicate rising effective moisture and higher proportions of summer precipitation continued at least until ca. 5500 cal yr BP when a landslide entered the lake margin. Between ca. 4500 and 2400... Categories: Data; Types: Map Service, OGC WFS Layer, OGC WMS Layer, OGC WMS Service; Tags: Ecology, Geomorphology, Great Basin, Holocene, Hydrology, All tags... Limnology, Sedimentology, USGS Science Data Catalog (SDC), Upper Colorado, Utah, Wasatch Plateau, high elevation lake, lake level, late Holocene dry period, oxygen isotopes, paleoclimatology, paleohydrology, Fewer tags 1 2 3 4 »