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Grain size and bulk density of sediment cores from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 Grain size distribution and bulk density are reported for sediment push cores from two flooded agricultural tracts, Little Holland Tract and Liberty Island, in the Sacramento-San Joaquin Delta, California. Push core samples were collected from 14 sites by the U.S Geological Survey in August, 2014. Each core was analyzed at multiple depths to investigate variations in particle sizes with depth below the sediment surface. The same sites were sampled again in 2016 (https://www.sciencebase.gov/catalog/item/5a73aa70e4b0a9a2e9e172de). These data provide insight into the variation of particle size distributions in space, bed depth, and time. Categories: Data; Tags: CMGP, Coastal and Marine Geology Program, Liberty Island, Little Holland Tract, Oceans, All tags... 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, bulk density, grain-size analysis, push coring, sea-floor characteristics, sediment transport, unconsolidated deposits, Fewer tags Grain size and bulk density of sediment cores from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2016 Grain size distribution and bulk density are reported for sediment push cores from two flooded agricultural tracts, Little Holland Tract and Liberty Island, in the Sacramento-San Joaquin Delta, California. Push core samples were collected from 17 sites by the U.S. Geological Survey in June 2016. Each core was analyzed at multiple depths to investigate variations in particle sizes with depth below the sediment surface. The same sites were sampled previously in 2014 (https://www.sciencebase.gov/catalog/item/5a73a58fe4b0a9a2e9e172cf). These data provide insight into the variation of particle size distributions in space, bed depth, and time. Categories: Data; Tags: CMGP, Coastal and Marine Geology Program, Liberty Island, Little Holland Tract, Oceans, All tags... 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, bulk density, grain-size analysis, push coring, sea-floor characteristics, sediment transport, unconsolidated deposits, Fewer tags