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Geologic Unit: Saratoga
Map showing publication footprint
  • Usage in publication:
    • Saratoga chalk*
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Ouachita folded belt
Publication:

Cooke, C.W., 1953, American Upper Cretaceous Echinoidea, IN Shorter contributions to general geology, 1953: U.S. Geological Survey Professional Paper, 254-A, p. A1-A44.


Summary:

Is echinoid-bearing formation above Annona chalk in southwest AR. Is shown (fig. 1) to correlate with Neylandville marl in TX and with Mount Laurel sand in NJ. Biostratigraphic dating on basis of the echinoid CARDIASTER DECIPER Cooke collected from the Saratoga at USGS localities 13539 and 13550, Clark Co, AR in the Ouachita tectonic belt province. Age is early Maestrichtian (Late Cretaceous). Division of the Maestrichtian into three parts (early, middle, and late) is arbitrary. It signifies merely relative position.

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


Map showing publication footprint
  • Usage in publication:
    • Saratoga Chalk*
  • Modifications:
    • Paleomagnetics
  • AAPG geologic province:
    • Arkla basin
Publication:

Liddicoat, J.C., Hazel, J.E., Brouwers, E.M., Bryant, W.A., and Bottjer, D.J., 1981, Magnetostratigraphy of Upper Cretaceous deposits in southwestern Arkansas and northeastern Texas [abs.]: American Association of Petroleum Geologists Bulletin, v. 65, no. 4, p. 764-765. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Paleomagnetic (a.f. demagnetized) data indicates the Upper Cretaceous Saratoga Chalk in the Arkla basin in southwest AR possesses a weak remanent magnetization of normal magnetic polarity. The normal polarity is assumed to be primary magnetization, and is interpreted to represent deposition during the Gubbio (Italy) normal polarity zone B+ (Campanian to early Maestrichtian).

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


Map showing publication footprint
  • Usage in publication:
    • Saratoga Chalk*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Arkla basin
Publication:

Cobban, W.A., and Kennedy, W.J., 1991, Upper Cretaceous (Maastrichtian) ammonites from the Nostoceras alternatum Zone in southwestern Arkansas, IN Sando, W.J., ed., Shorter contributions to paleontology and stratigraphy: U.S. Geological Survey Bulletin, 1985-E, p. E1-E6.


Summary:

Lower member in southwest AR, Arkla basin, has an ammonite fauna of the NOSTOCERAS (NOSTOCERAS) HYATTI zone of late Campanian age.

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


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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