{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "PCMSC Science Data Coordinator", "hasEmail": "mailto:pcmsc_data@usgs.gov"}, "description": "Grain size distribution, bulk density, and percent carbon are reported for sediment samples from two flooded agricultural tracts, Little Holland Tract and Liberty Island, in the Sacramento-San Joaquin Delta, California. Samples were repeatedly collected at 8 sites using a Ponar grab or push core samplers during 19 visits to the study area from 2015 to 2019. The long-term time series data collection stations (sites LWA, HVB, HWC, and LVB) were sampled on almost every field survey, and the remaining sites were sampled 6 or times or fewer, some only once. All samples were analyzed for grain size distribution, and some were analyzed for bulk density and/or percent carbon. These data provide insight into how particle size distributions varied spatially and temporally.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/F7V1241K", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.63af6b7ad34e92aad3ca60ee.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_63af6b7ad34e92aad3ca60ee", "keyword": ["CMGP", "Coastal and Marine Geology Program", "Liberty Island", "Little Holland Tract", "Oceans", "PCMSC", "Pacific Coastal and Marine Science Center", "Sacramento-San Joaquin Delta", "Sediment", "Sedimentation", "State of California", "Substrate", "U.S. Bureau of Reclamation", "U.S. Geological Survey", "USBR", "USGS", "USGS:63af6b7ad34e92aad3ca60ee", "bulk density", "carbon", "grab sampling", "grain-size analysis", "push coring", "sea-floor characteristics", "sediment transport", "unconsolidated deposits"], "modified": "2025-03-19T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-121.6742, 38.2671, -121.6579, 38.3335", "theme": ["geospatial"], "title": "Grain size and bulk density from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2015 to 2019 (ver. 4.0, March 2025)"}