Item talk:Q312885

{

 "USGS Publications Warehouse": {
   "@context": "https://schema.org",
   "@type": "Article",
   "additionalType": "Journal Article",
   "name": "Widespread loess-like deposit in the Martian northern lowlands identifies Middle Amazonian climate change",
   "identifier": [
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse IndexID",
       "value": "70135621",
       "url": "https://pubs.usgs.gov/publication/70135621"
     },
     {
       "@type": "PropertyValue",
       "propertyID": "USGS Publications Warehouse Internal ID",
       "value": 70135621
     },
     {
       "@type": "PropertyValue",
       "propertyID": "DOI",
       "value": "10.1130/G33513.1",
       "url": "https://doi.org/10.1130/G33513.1"
     }
   ],
   "journal": {
     "@type": "Periodical",
     "name": "Geology",
     "volumeNumber": "40",
     "issueNumber": "12"
   },
   "inLanguage": "en",
   "isPartOf": [
     {
       "@type": "CreativeWorkSeries",
       "name": "Geology"
     }
   ],
   "datePublished": "2014",
   "dateModified": "2018-12-05",
   "abstract": "Consistently mappable units critical to distinguishing the style and interplay of geologic processes through time are sparse in the Martian lowlands. This study identifies a previously unmapped Middle Amazonian (ca. 1 Ga) unit (Middle Amazonian lowland unit, mAl) that postdates the Late Hesperian and Early Amazonian lowland plains by >2 b.y. The unit is regionally defined by subtle marginal scarps and slopes, has a mean thickness of 32 m, and extends >3.1 \u00d7 106\u00a0km2\u00a0between lat 35\u00b0N and 80\u00b0N. Pedestal-type craterforms and nested, arcuate ridges (thumbprint terrain) tend to occur adjacent to unit mAl outcrops, suggesting that current outcrops are vestiges of a more extensive deposit that previously covered \u223c16 \u00d7 106\u00a0km2. Exposed layers, surface pits, and the draping of subjacent landforms allude to a sedimentary origin, perhaps as a loess-like deposit emplaced rhythmically through atmospheric fallout. We propose that unit mAl accumulated coevally with, and at the expense of, the erosion of the north polar basal units, identifying a major episode of Middle Amazonian climate-driven sedimentation in the lowlands. This work links ancient sedimentary processes to climate change that occurred well before those implied by current orbital and spin axis models.",
   "description": "4 p.",
   "publisher": {
     "@type": "Organization",
     "name": "Geological Society of America"
   },
   "author": [
     {
       "@type": "Person",
       "name": "Skinner, James A. jskinner@usgs.gov",
       "givenName": "James A.",
       "familyName": "Skinner",
       "email": "jskinner@usgs.gov",
       "identifier": {
         "@type": "PropertyValue",
         "propertyID": "ORCID",
         "value": "0000-0002-3644-7010",
         "url": "https://orcid.org/0000-0002-3644-7010"
       },
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Astrogeology Science Center",
           "url": "https://www.usgs.gov/centers/astrogeology-science-center"
         }
       ]
     },
     {
       "@type": "Person",
       "name": "Tanaka, Kenneth L. ktanaka@usgs.gov",
       "givenName": "Kenneth L.",
       "familyName": "Tanaka",
       "email": "ktanaka@usgs.gov",
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Astrogeology Science Center",
           "url": "https://www.usgs.gov/centers/astrogeology-science-center"
         }
       ]
     },
     {
       "@type": "Person",
       "name": "Platz, Thomas",
       "givenName": "Thomas",
       "familyName": "Platz",
       "affiliation": [
         {
           "@type": "Organization",
           "name": "Institute of Geological Sciences, Planetary Sciences and Remote Sensing, Freie Universitat Berlin"
         },
         {
           "@type": "Organization",
           "name": "Max Planck Institute for Solar System Research, G\u00f6ttingen, Germany"
         }
       ]
     }
   ],
   "funder": [
     {
       "@type": "Organization",
       "name": "Astrogeology Science Center",
       "url": "https://www.usgs.gov/centers/astrogeology-science-center"
     }
   ]
 }

}