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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Jones Ridge Limestone*
  • Modifications:
    • Named
    • Biostratigraphic dating
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Alaska East-Central region
Publication:

Brabb, E.E., 1967, Stratigraphy of the Cambrian and Lower Ordovician rocks of east-central Alaska, IN Lower Paleozoic paleontology and stratigraphy of west-central Alaska: U.S. Geological Survey Professional Paper, 559-A, p. A1-A30. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp559A]


Summary:

Named for exposures in vicinity of Jones Ridge. Type section designated as central part, sec.3 T3N R33E across crest of Jones Ridge to western part of sec.10 near Canadian border, east-central AK. Unit limited to Jones Ridge-Hi-yu-Squaw Mountain area and small Canadian area. Informally subdivided into: lower predominantly fine-grained limestone member and upper predominantly medium- to coarse-grained bioclastic limestone member. Lower member is 2940 ft thick; upper is 60 ft. Overlies Tindir Group; underlies unnamed chert, shale, and limestone. Fossils indicate age of lower member may range from Early Cambrian to Early Ordovician. Fossils indicate upper member is either Middle or Late Ordovician. There seems to be at least one disconformity within formation.
[NOTE: The Department of the Interior's Secretarial Order 3404, issued on November 19, 2021, formally identifies the term “squaw” as derogatory. That Order will create a federal Derogatory Geographic Names Task Force, to find replacement names for geographic features in use by federal agencies. We’re awaiting guidance from the Task Force, and will then take the appropriate actions.]

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 ([ ]).