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Geologic Unit: Hafey Mountain
Map showing publication footprint
  • Usage in publication:
    • Hafey Mountain Member
  • Modifications:
    • Named
  • Dominant lithology:
    • Quartzite
  • AAPG geologic province:
    • New England province
Publication:

Roy, D.C., 1980, Evaluation of the mineral potential, upper St. John River Valley, Aroostook County, Maine; Appendix A; Bedrock geology of pre-Devonian rocks in northwestern-most Aroostook County, Maine: Maine Geological Survey Open-File Report, no. 80-14b, 3 sheets, 34 p., (incl. geologic map, scale 1:62,500)


Summary:

The "Hafey Mountain sequence" of Boudette and others (1976), underlying a narrow belt between Hafey Mountain and Rocky Mountain, is here named the Hafey Mountain Member of the Seboomook Formation. The member lies within the slate-graywacke sequence of the Seboomook at an unknown but apparently significant distance above the base of the formation. The quartz arenite (quartzite) of the Hafey Mountain is described by Boudette and others (1976) as resistant, massive, locally conglomeratic, orthoquartzite interbedded with minor laminated sandstone and gray siltstone. The orthoquartzite is brownish-gray, granular, and laced with quartz veins. Age is Early Devonian.

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


Map showing publication footprint
  • Usage in publication:
    • Hafey Mountain Member
  • Modifications:
    • Overview
  • Dominant lithology:
    • Quartzite
  • AAPG geologic province:
    • New England province
Publication:

Roy, D.C., and Lowell, T.V., 1983, Bedrock and surficial geology of the upper St. John River area, northwestern Aroostook County, Maine; Field trip 5, IN Hussey, A.M., II, and Westerman, D.S., eds., Field trips of the Geological Society of Maine, 1978-1983: Maine Geology Bulletin, no. 3, p. 26-49.


Summary:

The Hafey Mountain Member of the Seboomook Formation is within the graywacke-rich portion of the formation and is 0 to 800 m thick. It appears to be well up in the section.

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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