Item talk:Q311225

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "Article",
   "additionalType": "Journal Article",
   "name": "40Ar-39Ar dating of the Manson impact structure: A cretaceous-tertiary boundary crater candidate",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70015456",
       "url": "https://pubs.usgs.gov/publication/70015456"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70015456
     },
     {
       "@type": "PropertyValue",
       "propertyID": "ISSN",
       "value": "00368075"
     }
   ],
   "journal": {
     "@type": "Periodical",
     "name": "Science",
     "volumeNumber": "244",
     "issueNumber": "4912"
   },
   "inLanguage": "en",
   "isPartOf": [
     {
       "@type": "CreativeWorkSeries",
       "name": "Science"
     }
   ],
   "datePublished": "1989",
   "dateModified": "2018-01-31",
   "abstract": "The mineralogy of shocked mineral and lithic grains in the Cretaceous-Tertiary (K-T) boundary claystone worldwide is most consistent with a bolide impact on a continent. Both the concentrations and sizes of these shocked grains are greatest in the western interior of North America. These data suggest that the Manson impact structure in north-central Iowa is a viable candidate for the K-T boundary impact event. Argon-40-argon-39 age spectrum dating of shocked microcline from the crystalline central uplift of the Manson impact structure indicates that there was severe argon-40 loss at 65.7 ?? 1.0 million years ago, an age that is indistinguishable from that of the K-T boundary, within the limits of analytical precision.",
   "publisher": {
     "@type": "Organization",
     "name": "U.S. Geological Survey"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Izett, G. A.",
       "givenName": "G. A.",
       "familyName": "Izett"
     },
     {
       "@type": "Person",
       "name": "Haugerud, R. A.",
       "givenName": "R. A.",
       "familyName": "Haugerud",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0001-7302-4351",
         "url": "https://orcid.org/0000-0001-7302-4351"
       }
     },
     {
       "@type": "Person",
       "name": "Sutter, J. F.",
       "givenName": "J. F.",
       "familyName": "Sutter"
     },
     {
       "@type": "Person",
       "name": "Kunk, Michael J. mkunk@usgs.gov",
       "givenName": "Michael J.",
       "familyName": "Kunk",
       "email": "mkunk@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0003-4424-7825",
         "url": "https://orcid.org/0000-0003-4424-7825"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Eastern Geology and Paleoclimate Science Center",
           "url": "https://www.usgs.gov/centers/florence-bascom-geoscience-center"
         },
         {
           "@type": "Organization",
           "name": "Florence Bascom Geoscience Center",
           "url": "https://www.usgs.gov/centers/florence-bascom-geoscience-center"
         }
       ]
     }
   ]
 }

}