{
    "tag": 19370,
    "title": "Sediment grain-size data from the Klamath River estuary, California",
    "pubdate": "20250828",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P13E57T8",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/ScienceBase\/DR_P13E57T8\/Klamath_estuary_sediment_grain_size_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "This data release includes grain-size measurements on sediment samples collected from the substrate surface and uppermost 10 cm of sediment deposits in the Klamath River estuary, northern California. Samples were collected using a BMH-60 bed-material sampler deployed from a boat, or by hand trowel from subaerial or shallow-water (less than 0.5 m water depth) regions along the estuary margins and side channels. Sediment grain size was analyzed at the U.S. Geological Survey (USGS) laboratory in Santa Cruz, Calif. Particles coarser than 2 mm were sieved using a RO-TAP sieve shaker, and particles finer than 2 mm were analyzed with a Beckman Coulter laser particle-size analyzer (LPSA) after organic matter had been removed using a hydrogen peroxide solution. At some submerged locations where sampling was attempted, no sample was recovered. The field crew observed this occurring in places where the substrate was too coarse-grained to be collected by the bed-material sampler (cobbles), where large particles were embedded in finer (poorly sorted) matrix, and where sediment was covered by algal mats thick enough to prevent the sampler from accessing the sedimentary substrate. Locations where sampling was attempted but no sample was recovered are indicated in the \u2018Comments\u2019 column within the data spreadsheet. The sediment samples were collected under a Cultural Resources Management Permit issued by the Yurok Tribe, whose collaboration the USGS acknowledges gratefully.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "East, Amy E.",
            "role": "Author"
        },
        {
            "name": "Schenk, Liam N.",
            "role": "Author"
        },
        {
            "name": "Curtis, Jennifer A.",
            "role": "Author"
        },
        {
            "name": "Logan, Joshua B.",
            "role": "Author"
        },
        {
            "name": "Cahill, Joshua",
            "role": "Author"
        },
        {
            "name": "Anderson, Chauncey W.",
            "role": "Author"
        },
        {
            "name": "Haluska, Patrick",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "379",
            "name": "field sampling",
            "scope": "Collecting pieces or specimens or making measurements or observations at determined intervals or areas.  Results may be used as representative of the whole research area or population."
        },
        {
            "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": "626",
            "name": "land surface characteristics",
            "scope": "Features and attributes of earth's land surface."
        },
        {
            "thcode": 15,
            "code": "007",
            "name": "environment",
            "scope": "Environmental resources, protection and conservation, for example environmental pollution, waste storage and treatment, environmental impact assessment, monitoring environmental risk, nature reserves, landscape, water quality, air quality, environmental modeling"
        },
        {
            "thcode": 15,
            "code": "008",
            "name": "geoscientificInformation",
            "scope": "Information pertaining to earth sciences, for example geophysical features and processes, geology, minerals, sciences dealing with the composition, structure and origin of the earth's rocks, risks of earthquakes, volcanic activity, landslides, gravity information, soils, permafrost, hydrogeology, groundwater, erosion"
        },
        {
            "thcode": 23,
            "code": "3",
            "name": "Distributions",
            "scope": "Locations or patterns of a feature of interest across space and (or) time. These data can include point data, lines, polygons, and temporal data at any scale relevant to CMSP and can be produced by observation, interpolation, or modeling. Distributions can also include maps or statistics of climatology, the environmental values that are expected to be observed at the present time."
        },
        {
            "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\/686ed336d4be020e5c0a6c1c?name=IMG_5825.jpeg&allowOpen=true",
            "description": "Sampling sediment along the Klamath River estuary, 2024."
        }
    ],
    "fan": []
}