@prefix dcat: <http://www.w3.org/ns/dcat#> .
@prefix dct: <http://purl.org/dc/terms/> .
@prefix foaf: <http://xmlns.com/foaf/0.1/> .
@prefix gsp: <http://www.opengis.net/ont/geosparql#> .
@prefix locn: <http://www.w3.org/ns/locn#> .
@prefix vcard: <http://www.w3.org/2006/vcard/ns#> .
@prefix xsd: <http://www.w3.org/2001/XMLSchema#> .

<https://data.amerigeoss.org/dataset/72e2a54a-da15-4fba-8d1c-39fd4496866c> a dcat:Dataset ;
    dct:description "A study was conducted to assess the vertical accretion of sediment in the Mud Lake impoundment of Sand Lake National Wildlife Refuge, located in Brown County, South Dakota. Sediment cores were collected from the Mud Lake impoundment during 2000 for determination of vertical accretion rates, which were estimated using cesium-137 and lead-210 isotopic dating techniques. These data directly support the associated publication “Sedimentation Rates in the Marshes of Sand Lake National Wildlife Refuge, South Dakota” which is referenced within the Metadata." ;
    dct:identifier "USGS:5feb9072d34ea5387defbb6e" ;
    dct:issued "2025-11-22T16:25:23.839307"^^xsd:dateTime ;
    dct:modified "20220421"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-98.3812 45.6400, -98.3812 45.9321, -98.1203 45.9321, -98.1203 45.6400, -98.3812 45.6400))"^^gsp:wktLiteral ] ;
    dct:title "Isotopic data for soil cores collected during 2000 from Sand Lake National Wildlife Refuge, South Dakota" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Brian Tangen" ;
            vcard:hasEmail <mailto:btangen@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/72e2a54a-da15-4fba-8d1c-39fd4496866c/resource/0d4d14af-b85a-42da-a914-e89207df06e0>,
        <https://data.amerigeoss.org/dataset/72e2a54a-da15-4fba-8d1c-39fd4496866c/resource/fe3b5409-2f33-4059-aa9e-20b1f92f9aae> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "cesium",
        "ckan",
        "core-analysis",
        "environment",
        "field-inventory-and-monitoring",
        "geo",
        "geoss",
        "inlandwaters",
        "isotopic-analysis",
        "lead",
        "national",
        "north-america",
        "radiometric-dating",
        "radium",
        "sand-lake-national-wildlife-refuge",
        "sedimentation",
        "south-dakota",
        "united-states",
        "united-states-of-america",
        "usgs-5feb9072d34ea5387defbb6e" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/72e2a54a-da15-4fba-8d1c-39fd4496866c/resource/0d4d14af-b85a-42da-a914-e89207df06e0> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:18:43.474699"^^xsd:dateTime ;
    dct:modified "2025-11-22T16:25:23.827613"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9KPH0QS> ;
    dcat:mediaType "application/http" .

<https://data.amerigeoss.org/dataset/72e2a54a-da15-4fba-8d1c-39fd4496866c/resource/fe3b5409-2f33-4059-aa9e-20b1f92f9aae> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T19:18:43.474692"^^xsd:dateTime ;
    dct:modified "2025-11-22T16:25:23.827202"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5feb9072d34ea5387defbb6e.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> a foaf:Agent ;
    foaf:name "US Migrating" .