{
    "tag": 15453,
    "title": "Depth to Quaternary regional unconformities offshore of the Delmarva Peninsula, including Maryland and Virginia state waters",
    "pubdate": "20230519",
    "sername": null,
    "series_name": null,
    "issue": "DOI:10.5066\/P9GQY0ZN",
    "publish": null,
    "publisher_name": null,
    "onlink": "https:\/\/cmgds.marine.usgs.gov\/catalog\/whcmsc\/SB_data_release\/DR_P9GQY0ZN\/Delmarva_depth_meta.faq.html",
    "format": null,
    "email": null,
    "descript": "Geologic structure and isopach maps were constructed by interpreting over 19,890 trackline kilometers of co-located multichannel boomer, sparker and chirp seismic reflection profiles from the continental shelf of the Delmarva Peninsula, including Maryland and Virginia state waters. In this region, Brothers and others (2020) interpret 12 seismic units and 11 regional unconformities. They interpret the infilled channels as Late Tertiary and Quaternary courses of the Susquehanna, Potomac, Rappahannock, York and James Rivers and tributaries, in addition to a broad drainage system. These regional unconformities form a composite unconformity interpreted as the Quaternary-Tertiary (Q-T) unconformity. A depth to Tertiary (Uqt) and total Quaternary sediment thickness (Q) isopach are included with this data release. Other products in this data release include thickness of an early Pleistocene unit (Qbd), thickness of a Pleistocene highstand system tract (Q2), thickness of a post last glacial maximum (LGM) fluvial\/estuarine unit (Qcch), thickness of Holocene to modern marine sediment (Qmn), depth to the base of the Persimmons Point and Ocean City paleochannels (U4), depth to the base of the Exmore and Belle Haven paleochannels (U6), depth to the base of the Eastville paleochannel and tributaries (U8), depth to the base (fluvial unconformity) of the Cape Charles paleochannel and tributary paleochannels (fluvial unconformity, U10) and the base (tidal ravinement) of associated Holocene tidal and back-barrier deposits (tidal ravinement surface, U10.5).",
    "lang": null,
    "journal": null,
    "pwid": null,
    "originator": [
        {
            "name": "Foster, David S.",
            "role": "Author"
        },
        {
            "name": "Brothers, Laura L.",
            "role": "Author"
        },
        {
            "name": "Baldwin, Wayne E.",
            "role": "Author"
        },
        {
            "name": "Pendleton, Elizabeth A.",
            "role": "Author"
        }
    ],
    "index_term": [
        {
            "thcode": 2,
            "code": "452",
            "name": "geologic contacts",
            "scope": "Junctions of two different rock formations varying by type or age of rock, including faults, unconformities, and bedding planes."
        },
        {
            "thcode": 2,
            "code": "474",
            "name": "geospatial datasets",
            "scope": "Collections of related digital information that are geographically referenced."
        },
        {
            "thcode": 2,
            "code": "1636",
            "name": "Holocene",
            "scope": "Epoch of geologic time approximately 11 thousand years ago extending to the present. https:\/\/doi.org\/10.3133\/fs20103059"
        },
        {
            "thcode": 2,
            "code": "706",
            "name": "marine geology",
            "scope": "Branch of geology concerned with the composition, geologic history, and earth processes of the ocean floor and the continental margin."
        },
        {
            "thcode": 2,
            "code": "1653",
            "name": "Pleistocene",
            "scope": "Epoch of geologic time approximately 2.6 million to 11 thousand years ago. https:\/\/doi.org\/10.3133\/fs20103059"
        },
        {
            "thcode": 2,
            "code": "1657",
            "name": "Quaternary",
            "scope": "Period of geologic time approximately 2.6 million years ago extending to the present. In new studies, this term is deprecated in favor of Holocene and Pleistocene. https:\/\/doi.org\/10.3133\/fs20103059"
        },
        {
            "thcode": 2,
            "code": "2079",
            "name": "scientific interpretation",
            "scope": "Application of scientific judgment as to the meaning of observations or models. Use for interpretations that are provided in formats similar to data, such as geospatial data."
        },
        {
            "thcode": 2,
            "code": "1662",
            "name": "Tertiary",
            "scope": "Period of geologic time approximately 65 to 1.8 million years ago. In new studies, this term is deprecated in favor of Neogene and Paleogene. https:\/\/doi.org\/10.3133\/fs20103059"
        },
        {
            "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": "010",
            "name": "imageryBaseMapsEarthCover",
            "scope": "Base maps, for example land\/earth cover, topographic maps, imagery, unclassified images, annotations, digital ortho imagery"
        },
        {
            "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"
        }
    ],
    "place_term": [],
    "image": [
        {
            "name": "https:\/\/www.sciencebase.gov\/catalog\/file\/get\/64371a38d34ee8d4addccf2a\/?name=Delmarva_depth_Uqt_browse.png&allowOpen=true",
            "description": "Browse image of a grid representing the depth to the Quaternary-Tertiary composite unconformity (Uqt) offshore of the Delmarva Peninsula, including Maryland and Virginia state waters."
        }
    ],
    "fan": [
        "1974-004-FA",
        "1975-003-FA",
        "2014-002-FA",
        "2015-001-FA"
    ]
}