U.S. Geological Survey Home AASG Logo USGS HOME CONTACT USGS SEARCH USGS
National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Priests Pass leucomonzonite*
  • Modifications:
    • Named
  • Dominant lithology:
    • Monzonite
  • AAPG geologic province:
    • Montana folded belt
Publication:

Knopf, Adolph, 1957, The Boulder bathylith of Montana: American Journal of Science, v. 255, no. 2, p. 81-103.


Summary:

Name applied to a mass at Priests Pass south of Mullan Pass, Lewis and Clark Co, MT in the Montana folded belt province. Geologic map; shown as a small mass that straddles the Continental divide, extending into adjacent Powell Co, MT in the Montana folded belt province. No type locality designated. Chemical composition shown on a table. Is in contact with Clancy granodiorite (new), and with pre- and post-bathylithic rocks. Is one of five intrusions related to the Boulder bathylith. Late Cretaceous age.

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


Map showing publication footprint
  • Usage in publication:
    • Priest Pass Leucomonzonite*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Montana folded belt
Publication:

Knopf, Adolph, 1963, Geology of the northern part of the Boulder bathylith and adjacent area, Montana: U.S. Geological Survey Miscellaneous Investigations Series Map, I-381, 1 sheet, scale 1:48,000


Summary:

Name emended to Priest Pass Leucomonzonite. Is a rock of monzonite composition, nearly devoid of quartz, about 9 percent hornblende and biotite. Mapped in the west-central part of area in four areas in Lewis and Clark and adjacent Powell Cos, MT in the Montana folded belt province. Assigned to the Cretaceous.

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 ([ ]).