{
    "tag": 15680,
    "title": "Radiocarbon measurements from core 721-1 obtained in 2002 off San Francisquito Creek in South San Francisco Bay",
    "pubdate": "20230828",
    "sername": null,
    "series_name": null,
    "issue": "DOI: 10.5066\/P9QQT6KZ",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/pcmsc\/DataReleases\/ScienceBase\/DR_P9QQT6KZ\/SFC_radiocarbon_metadata.faq.html",
    "format": null,
    "email": null,
    "descript": "This data release provides radiocarbon measurements from a core obtained off San Francisquito Creek in South San Francisco Bay.",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "McGann, Mary L.",
            "role": "Author"
        },
        {
            "name": "Starratt, Scott W.",
            "role": "Author"
        },
        {
            "name": "Reidy, Liam M.",
            "role": "Author"
        },
        {
            "name": "Lorenson, Thomas D.",
            "role": "Author"
        },
        {
            "name": "Phillips, R. Lawrence",
            "role": "Author"
        },
        {
            "name": "Kneeshaw, Tara A.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "143",
            "name": "carbon-14 analysis",
            "scope": "Method to determine the age of organic geologic and archaeological specimens, aged approximately 3,000 to 50,000 years, by determining the decay of the radioactive isotope carbon-14."
        },
        {
            "thcode": 2,
            "code": "153",
            "name": "chemical analysis",
            "scope": "Chemical techniques used to identify the composition of substances."
        },
        {
            "thcode": 2,
            "code": "437",
            "name": "geochemistry",
            "scope": "Study of the distribution of chemical elements and natural compounds on the earth and in the atmosphere and the chemical processes that affect the earth."
        },
        {
            "thcode": 2,
            "code": "703",
            "name": "marine chemistry",
            "scope": "Branch of chemistry that deals with the properties, composition, structure, and interaction of substances in the seas and oceans."
        },
        {
            "thcode": 2,
            "code": "711",
            "name": "mass spectroscopy",
            "scope": "Instrumental technique to separate and identify molecules.  Gaseous ions are formed, with or without fragmentation.  Their mass\/charge ratios and relative electrical abundance are then measured or the spectra are recorded."
        },
        {
            "thcode": 2,
            "code": "954",
            "name": "radiometric dating",
            "scope": "Methods for age determination of rocks and fossils by measuring the proportions of naturally occurring radioactive isotopes to their decay products."
        },
        {
            "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": 15,
            "code": "016",
            "name": "society",
            "scope": "Characteristics of society and culture, for example settlements, housing, anthropology, archaeology, education, traditional beliefs, manners and customs, demographic data, tourism, recreational areas and activities, parks, recreational trails, historical sites, cultural resources, social impact assessments, crime and justice, law enforcement, census information, immigration, ethnicity"
        },
        {
            "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": "111",
            "name": "bay",
            "scope": "a recess in the shoreline, typically bounded by capes or headlands."
        },
        {
            "thcode": 61,
            "code": "466",
            "name": "gravity coring",
            "scope": "technique using a long, weighted cylindrical pipe to obtain sediment cores from the sea floor."
        },
        {
            "thcode": 61,
            "code": "314",
            "name": "sediment deposition",
            "scope": "the effects of deposition on natural sedimentary environments."
        },
        {
            "thcode": 61,
            "code": "700",
            "name": "sediment geochemistry",
            "scope": "the study of the chemical composition and cycling of sedimentary systems."
        }
    ],
    "place_term": [],
    "image": [],
    "fan": [
        "2002-603-DD"
    ]
}