{
    "tag": 18930,
    "title": "Grain size and bulk density of sediment cores from Little Holland Tract and Liberty Island, Sacramento-San Joaquin Delta, California, 2014 (ver. 2.0, March 2025)",
    "pubdate": "2018",
    "sername": null,
    "series_name": null,
    "issue": "doi:10.5066\/F7V1241K",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/ScienceBase\/DR_F7V1241K\/GrainSizeBDCarbon_LHT-LI_2014Cores.faq.html",
    "format": null,
    "email": null,
    "descript": "Grain size distribution, bulk density, and percent carbon 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.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Lacy, Jessica R.",
            "role": "Author"
        },
        {
            "name": "Dailey, Evan T.",
            "role": "Author"
        },
        {
            "name": "Carlson, Emily M.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "1714",
            "name": "bulk density",
            "scope": "Overall density of an unconsolidated earth material."
        },
        {
            "thcode": 2,
            "code": "1420",
            "name": "carbon",
            "scope": "Nonmetal element with symbol C and atomic number 6 <http:\/\/periodic.lanl.gov\/6.shtml>"
        },
        {
            "thcode": 2,
            "code": "493",
            "name": "grain-size analysis",
            "scope": "Method of studying soils, sediments, sands, or rock by determining the size, distribution, and proportion of selected particles."
        },
        {
            "thcode": 2,
            "code": "2064",
            "name": "push coring",
            "scope": "Use of a small, hand-held tube pressed into unconsolidated material for sampling."
        },
        {
            "thcode": 2,
            "code": "1025",
            "name": "sea-floor characteristics",
            "scope": "Geomorphic features and geographic, compositional, and textural variation in the materials composing the ocean floor. Includes both large-scale structures (such as seamounts and rises) and fine-scale variations in rocks and deposits on the sea floor."
        },
        {
            "thcode": 2,
            "code": "1034",
            "name": "sediment transport",
            "scope": "Transport of solid particles of unconsolidated rock and mineral fragments, chemical precipitates, or biological materials."
        },
        {
            "thcode": 2,
            "code": "1199",
            "name": "unconsolidated deposits",
            "scope": "Loosely bound sediments such as sand, gravel, and silt which tend to accumulate in low areas or valleys."
        },
        {
            "thcode": 15,
            "code": "014",
            "name": "oceans",
            "scope": "Features and characteristics of salt water bodies (excluding inland waters), for example tides, tidal waves, coastal information, reefs, maritime, outer continental shelf submerged lands, shoreline"
        },
        {
            "thcode": 23,
            "code": "23",
            "name": "Substrate",
            "scope": "Represents the character and composition of the surface and near surface of the sea floor in subtidal or intertidal areas, as defined in the Substrate Component of CMECS or in similar classification systems. Distributions are records of substrate characteristics based on visual or photographic inspection or on analysis of samples and cores, and they also include interpretive maps classifying areas on the basis of combinations of observations, hydrodynamic models, or geological models. Assessments include evaluations of present ecological or economic values of substrate distributions, drivers of substrate change, and functions of substrates. Predictions are the results of models or projections of future substrate distributions, values, or ecological impacts, including predicted substrate changes due to natural and human forces including erosion, accretion, sea-level change, extraction, trawling, or other factors; and they are the results of scenario-based models of substrate changes on ecological or economic values under different management strategies or other human alterations."
        },
        {
            "thcode": 61,
            "code": "220",
            "name": "sediment",
            "scope": "unconsolidated weathering products that have been eroded, transported, and deposited in another location."
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/5a73a58fe4b0a9a2e9e172cf?name=LHT-LI_SampleMeans_2014_Depths.png&allowOpen=true",
            "description": "Image map showing average values of median grain size (excluding gravel) and ratio of sand, silt, and clay for samples 0 to 2 cm deep (left) and 4 to 5 cm deep (right) at each sampling location."
        }
    ],
    "fan": []
}