@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/23371219-05b6-4e6a-b86e-76fc89ec6458> a dcat:Dataset ;
    dct:description """This dataset describes the quantity, morphology, and polymer identity of microplastics in the water column and surficial sediments of Milwaukee-Area streams, the Milwaukee Harbor, and Lake Michigan (Wisconsin). Water samples were collected at 10 locations, 2-4 times each, from May to September, 2016. At the 4 shallowest locations, water was collected only at the water surface. At the remaining 6 locations, water was collected at the water surface and at 1-4 depths below the surface. Sediment samples were collected once, in June 2016, at a subset of 9 locations. Sampling and analysis methods are described in the Processing Steps section of the metadata.
These data are interpreted in the following journal article: Lenaker, P. L., Baldwin, A. K., Corsi, S. R., Mason, S. A., Reneau, P. C., &amp; Scott, J. W. (2019). Vertical Distribution of Microplastics in the Water Column and Surficial Sediment from the Milwaukee River Basin to Lake Michigan. Environmental Science &amp; Technology, 53(21), 12227–12237, https://doi.org/10.1021/acs.est.9b03850.""" ;
    dct:identifier "USGS:5cb0d7bfe4b0c3b0065741b0" ;
    dct:issued "2025-11-20T11:35:16.717002"^^xsd:dateTime ;
    dct:modified "20200820"^^xsd:gYear ;
    dct:publisher <https://data.amerigeoss.org/organization/727dbdd5-3f98-4ac0-9d28-5e344558139b> ;
    dct:spatial [ a dct:Location ;
            locn:geometry "POLYGON ((-88.3795 42.8599, -88.3795 43.3551, -87.7066 43.3551, -87.7066 42.8599, -88.3795 42.8599))"^^gsp:wktLiteral ] ;
    dct:title "Microplastics in the water column and sediment in Milwaukee-Area streams, the Milwaukee Harbor, and Lake Michigan, 2016" ;
    dcat:contactPoint [ a vcard:Organization ;
            vcard:fn "Austin K Baldwin" ;
            vcard:hasEmail <mailto:akbaldwi@usgs.gov> ] ;
    dcat:distribution <https://data.amerigeoss.org/dataset/23371219-05b6-4e6a-b86e-76fc89ec6458/resource/63c2015a-9259-4c92-a531-c71821565d69>,
        <https://data.amerigeoss.org/dataset/23371219-05b6-4e6a-b86e-76fc89ec6458/resource/e1ca73c3-9516-40ea-9c0f-97b655224920> ;
    dcat:keyword "amerigeo",
        "amerigeoss",
        "ckan",
        "contamination-and-pollution",
        "geo",
        "geoss",
        "inlandwaters",
        "lake-michigan",
        "microplastics",
        "milwaukee",
        "national",
        "north-america",
        "runoff",
        "surface-water-quality",
        "united-states",
        "usgs-5cb0d7bfe4b0c3b0065741b0",
        "wisconsin" ;
    dcat:theme <%7Bgeospatial%7D> .

<https://data.amerigeoss.org/dataset/23371219-05b6-4e6a-b86e-76fc89ec6458/resource/63c2015a-9259-4c92-a531-c71821565d69> a dcat:Distribution ;
    dct:description "The metadata original format" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:10:00.437093"^^xsd:dateTime ;
    dct:modified "2025-11-20T11:35:16.706390"^^xsd:dateTime ;
    dct:title "Original Metadata" ;
    dcat:accessURL <https://data.usgs.gov/datacatalog/metadata/USGS.5cb0d7bfe4b0c3b0065741b0.xml> ;
    dcat:mediaType "text/xml" .

<https://data.amerigeoss.org/dataset/23371219-05b6-4e6a-b86e-76fc89ec6458/resource/e1ca73c3-9516-40ea-9c0f-97b655224920> a dcat:Distribution ;
    dct:description "Landing page for access to the data" ;
    dct:format "XML" ;
    dct:issued "2022-07-28T20:10:00.437103"^^xsd:dateTime ;
    dct:modified "2025-11-20T11:35:16.706821"^^xsd:dateTime ;
    dct:title "Digital Data" ;
    dcat:accessURL <https://doi.org/10.5066/P9FM835B> ;
    dcat:mediaType "application/http" .

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