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Geologic Unit: Kossuth
Map showing publication footprint
  • Usage in publication:
    • Kossuth Group
  • Modifications:
    • First used
  • Dominant lithology:
    • Slate
    • Volcanics
  • AAPG geologic province:
    • New England province
Publication:

Ludman, Allan, 1991, Stratigraphy of the Miramichi terrane in eastern Maine, IN Ludman, Allan, ed., Geology of the coastal lithotectonic block and neighboring terranes, eastern Maine and southern New Brunswick: New England Intercollegiate Geological Conference Guidebook, 83rd annual meeting, Princeton, ME, September 27-28, 1991, p. 338-357.


Summary:

Kossuth Group [new name] subdivided in this report into (ascending) Bowers Mountain and Stetson Mountain Formations [new names]. Overlies Baskahegan Lake Formation (new name) and underlies Prentiss Group [new name]. Bowers Mountain consists of black, carbonaceous pelitic rocks, or thin bedded gray slates with minor sandstone; or an alternation of these two units. The Stetson Mountain Formation consists for the most part of felsic volcanic rocks. Age shown as Late Cambrian and Ordovician. Age of the Bowers Mountain is poorly constrained, but graptolites from the Tolman Hill member of the Stetson Mountain indicate a Caradocian age.

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


Map showing publication footprint
  • Usage in publication:
    • Kossuth Group
  • Modifications:
    • Overview
  • AAPG geologic province:
    • New England province
Publication:

Ludman, Allan, Hopeck, J.T., and Brock, P.C., 1993, Nature of the Acadian orogeny in eastern Maine, IN Roy, D.C., and Skehan, J.W., eds., The Acadian orogeny; recent studies in New England, maritime Canada, and the autochthonous foreland: Geological Society of America Special Paper, 275, p. 67-84.


Summary:

"Rocks of the Miramichi belt are separated by an unconformity into two packages--the Baskahegan Lake Formation and the Kossuth Group." The Baskahegan Lake is more complexly deformed than the formations of the overlying Kossuth. A middle Caradocian age is indicated by graptolites for the Stetson Mountain Formation at the top of the Kossuth, while an Early Ordovician age (Arenigian(?)-Llandeilian) age is inferred for the lower part of the Bowers Mountain Formation. [Unit name is italicized throughout the report as authors consider it informal at this time. They state that it is being formally proposed but do not indicate a reference for such a proposal. Reader is referred to Ludman (1990), an Open-File report, for a complete description of the unit.]

Source: GNU records (USGS DDS-6; Reston 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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