{"accessLevel": "public", "bureauCode": ["010:12"], "contactPoint": {"@type": "vcard:Contact", "fn": "William Rouse", "hasEmail": "mailto:wrouse@usgs.gov"}, "description": "The Middle\u2013Upper Triassic Shublik Formation is the main source rock for Arctic Alaska oil and gas accumulations, including the supergiant Prudhoe Bay field.  A revised stratigraphic framework recently has been developed in outcrop for the Shublik and related strata that delineates three large-scale stratigraphic units: 1) the lower clastic (LC) unit, 2) the middle carbonate-chert (MCC) unit, and 3) the upper clastic-carbonate (UCC) unit.  The three stratigraphic units were interpreted to comprise five transgressive-regressive (T-R) sequences (LC1, MCC1, MCC2, MCC3, and UCC1).  This outcrop-based framework has been extended to the subsurface of the Alaska North Slope using gamma-ray logs from 161 exploration wells.  Subsurface stratigraphic picks of the five T-R sequences within the Shublik Formation for each well are documented herein.", "distribution": [{"@type": "dcat:Distribution", "accessURL": "https://doi.org/10.5066/P91O4B6R", "description": "Landing page for access to the data", "format": "XML", "mediaType": "application/http", "title": "Digital Data"}, {"@type": "dcat:Distribution", "description": "The metadata original format", "downloadURL": "https://data.usgs.gov/datacatalog/metadata/USGS.5e138050e4b0ecf25c53b38c.xml", "format": "XML", "mediaType": "text/xml", "title": "Original Metadata"}], "identifier": "http://datainventory.doi.gov/id/dataset/USGS_5e138050e4b0ecf25c53b38c", "keyword": ["Alaska", "Earth Science", "Geology", "Natural Gas", "Natural Resources", "North Slope", "Oil", "U.S. Geological Survey", "USGS", "USGS:5e138050e4b0ecf25c53b38c", "gamma-ray logging", "stratigraphy"], "modified": "2020-08-19T00:00:00Z", "publisher": {"@type": "org:Organization", "name": "U.S. Geological Survey"}, "spatial": "-166.15722655948, 68.989768160257, -142.86621093541, 71.370969653229", "theme": ["geospatial"], "title": "Subsurface stratigraphic picks of the Middle\u2013Upper Triassic Shublik Formation, Alaska North Slope"}