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Map showing publication footprint
  • Usage in publication:
    • Elijah Ridge Schist
  • Modifications:
    • Named
  • Dominant lithology:
    • Schist
  • AAPG geologic province:
    • Cascades province
Publication:

Misch, Peter, 1966, Tectonic evolution of the Northern Cascades of Washington State, IN Symposium on the tectonic history and mineral deposits of the western Cordillera: Canadian Institute of Mining and Metallurgy Special Publication, v. 8, p. 101-148.


Summary:

Also referred to as Elijah Hornfelsic Schist. Narrow eastern metamorphic belt in Skagit region of Northern Cascades, WA, is separated from Skagit Gneiss and Gabriel Peak Orthogneiss by late mid- and Late Cretaceous Ross Lake fault. Belt comprises Jack Mountain Phyllite (new) and Elijah Ridge Schist (new). Elijah Ridge Schist was derived from pre-Late Jurassic, late Paleozoic or Mesozoic volcanic-sedimentary North Creek Volcanics (new). The medium-grade metamorphism of Elijah Ridge Schist represents lower-pressure type than that of Skagit Suite.

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


Map showing publication footprint
  • Usage in publication:
    • Elijah Ridge Hornfelsic Schist
  • Modifications:
    • Redescribed
  • Dominant lithology:
    • Schist
    • Gneiss
  • AAPG geologic province:
    • Cascades province
Publication:

Misch, Peter, 1977, Bedrock geology of the North Cascades [Washington]; Field trip no. 1, IN Brown, E.H., and Ellis, R.C., eds., Geological excursions in the Pacific northwest: Geological Society of America [Guidebook for Field Trips], [90th] annual meeting, Seattle, WA, November 7-9, 1977, p. 1-62.


Summary:

Both metavolcanic and metasedimentary rocks are common in unit. Also contains minor orthogneiss derived from trondhjemite to dacitic dikes. Elijah Ridge Hornfelsic Schist can be traced southeastward into North Creek Volcanics (of latest Paleozoic(?) or Mesozoic age).

Source: GNU records (USGS DDS-6; Menlo 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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