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National Geologic Map Database
Geologic Unit: Elys Peak
Map showing publication footprint
  • Usage in publication:
    • Elys Peak Basalts*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Lake Superior region
Publication:

Morey, G.B., and Van Schmus, W.R., 1988, Correlation of Precambrian rocks of the Lake Superior region, United States, IN Harrison, J.E., and Peterman, Z.E., eds., Correlation of Precambrian rocks of the United States and Mexico: U.S. Geological Survey Professional Paper, 1241-F, p. F1-F31.


Summary:

Forms basal formation of /North Shore Volcanic Group in east-central and southeastern Minnesota in the Lake Superior region. Reversed polarity. Upper contact locally obscured by intrusive rocks; overlies Nopeming Formation. Age is Middle Proterozoic. Report includes correlation chart.
[North Shore Volcanic Group conflicts with nomenclature guidelines stating a group [or supergroup] name combines a geographic name with the term "group," [or "supergroup,"] and no lithic designation is included (ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]

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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