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National Geologic Map Database
Geologic Unit: Lebanon
Map showing publication footprint
  • Usage in publication:
    • Lebanon granite*
  • Modifications:
    • Age modified
    • Overview
  • Dominant lithology:
    • Granite
    • Gneiss
    • Amphibolite
    • Quartz monzonite
  • AAPG geologic province:
    • New England province
Publication:

Billings, M.P., 1955, Geologic map of New Hampshire: U.S. Geological Survey [State Geologic Map], scale 1:250,000


Summary:

Lebanon granite assigned to Oliverian plutonic series. Age changed to Middle or Late Devonian(?). Consists of two mappable units: granite (a subporphyritic granulated biotite granite), and a border gneiss (varying from amphibolite to quartz monzonite).

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 ([ ]).