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Location Folder Show Tree ROOT ScienceBase Catalog Users Filters Date Types (for Date Range) Contacts William E Odom Devendra Dahal U.S. Geological Survey - ScienceBase Dinesh (Contractor) Shrestha Core Science Systems More... Categories Data (1) Tag Types Theme (6) Tags (with Scheme=USGS Thesaurus) geochronology (1) geology (1) geomorphology (1) invasive species (1) nonindigenous species (1) remote sensing (1) View Results as: JSON ATOM CSV Browse Folder

Early Estimates of Exotic Annual Grass (EAG) in the Sagebrush Biome, USA, 2024 These datasets provide early estimates of 2024 fractional cover for exotic annual grass (EAG) species and one native perennial grass species on a weekly basis from April to late June. Typically, the EAG estimates are publicly released within 7-13 days of the latest satellite observation used for that version. Each weekly release contains five fractional cover maps along with their corresponding confidence maps for: 1) a group of 16 species of EAGs, 2) cheatgrass (Bromus tectorum); 3) Field Brome (Bromus arvensis); 4) medusahead (Taeniatherum caput-medusae); and 5) Sandberg bluegrass (Poa secunda). These datasets were generated leveraging field observations from Bureau of Land Management (BLM) Assessment, Inventory,... Tags: Arizona, California, Colorado, Field Brome, Great Basin, All tags... Harmonized Landsat Sentinel, Idaho, Kansas, Land Use Change, Montana, NDVI, Nebraska, Nevada, New Mexico, North Dakota, Oklahoma, Oregon, Poa secunda, Remote Sensing, South Dakota, Texas, Texas brome, USGS Science Data Catalog (SDC), United States, Utah, Washington, Wyoming, annual grass, annual herbaceous, cheatgrass, exotic, invasive species, medusahead, nonindigenous species, noxious, perennial grass, red brome, remote sensing, rye brome, sagebrush, soft brome, western United States, Fewer tags Cosmogenic Be-10 Exposure Data for a Boulder Field in Zepp, VA We have dated a boulder field in Zepp, VA using cosmogenic Be-10 exposure dating. Three samples taken from boulders at three elevations in the boulder field (804 m asl, 818 m asl, and 831 m asl) were processed at the Reston Cosmogenic Nuclide (RECON) Lab and measured via accelerator mass spectrometry at the Purdue Rare Isotope Measurement (PRIME) Lab. The results of this work are summarized in the file “Zepp_Exposure_Beryllium10_Odom.csv”. This file contains all relevant sample location data, as well as input variables for exposure age calculations. We employed the CRONUS v.3 exposure age calculator (Balco et al., 2008) to estimate exposure ages for these samples and report exposure ages derived using the LSDn time-dependent... Categories: Data; Tags: Beryllium-10, Boulder field, Climatology, Exposure dating, Geochronology, All tags... Geology, Geomorphology, Geomorphology, Glaciology, USGS Science Data Catalog (SDC), Virginia, Fewer tags