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National Geologic Map Database
Geologic Unit: Tupik
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Map showing publication footprint
  • Usage in publication:
    • Tupik formation*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
    • Chert
  • AAPG geologic province:
    • Alaska Northern region
Publication:

Sable, E.G., and Dutro, J.T., Jr., 1961, New Devonian and Mississippian formations in DeLong Mountains, northern Alaska: American Association of Petroleum Geologists Bulletin, v. 45, no. 5, p. 585-593. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Named as uppermost formation (of 3) of Lisburne group in DeLong Mountains, Brooks Range, northern AK. Type section designated as exposures on south side of Tupik Mountain adjacent to and south of type section of Kogruk formation (new) of Lisburne group. Is predominantly dark-gray to black, finely crystalline limestone and black chert. Thickness at type is 135 ft; upper part is eroded at type; is 700 ft thick 5 mi west-southwest of type. Overlies Kogruk formation; underlies chert and shale of probable Permian age 3 mi northwest of type. Age based on sparse fauna is Late Mississippian.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Tupik Formation*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Alaska Northern region
Publication:

Campbell, R.H., 1967, Areal geology in the vicinity of the Chariot Site, Lisburne Peninsula, northwestern Alaska: U.S. Geological Survey Professional Paper, 395, 71 p., (incl. geologic map, scale 1:63,360) [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp395]


Summary:

Tupik Formation of Sable and Dutro (1961) is geographically extended to vicinity of Chariot Site, Lisburne Peninsula, because of approximate faunal equivalence, general similarities in rock type, and its stratigraphic position as uppermost unit in Lisburne Group. Best exposed in sea cliffs about 1.5 mi west of mouth of Nasorak Creek. Distinguished from overlying Permian Siksikpuk Formation by darker color and slightly greater resistance to erosion. Fauna (gastropods and brachiopods) identified by J.T. Dutro, Jr. indicate Late Mississippian age. Absence of fauna of Pennsylvanian age contributes to interpretation of disconformity with overlying Siksikpuk; on other hand, no fossils have been found at higher stratigraphic position than about 150 ft below top; it is possible that Pennsylvanian Period is represented by rather thin zone of nonfossiliferous rocks.

Source: GNU records (USGS DDS-6; Menlo GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Tupik Formation*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Alaska Northern region

Map showing publication footprint
  • Usage in publication:
    • Tupik Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Alaska Northern region
Publication:

Moore, T.E., Wallace, W.K., Bird, K.J., Karl, S.M., Mull, C.G., and Dillon, J.T., 1994, Geology of northern Alaska, Chapter 3, IN Plafker, George, and Berg, H.C., eds., Geology of Alaska: Geological Society of America, The Geology of North America, The Decade of North American Geology (DNAG), v. G-1, p. 49-140.


Summary:

Tupik Formation is Late Mississippian and Early Pennsylvanian(?) age based on fossils and stratigraphic relations. [see also Campbell (1967, USGS Prof. Paper 395, p.19)]

Source: GNU records (USGS DDS-6; Menlo GNULEX).


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Asterisk (*) indicates published by U.S. Geological Survey authors.

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