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Information About

Chinle Formation
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HISTORY OF INVESTIGATION

There is no designated Type Locality for this formation. It was named for Chinle Valley in Apache County, Arizona by Gregory in 1917 (he first used the name two years before but did not indicate a wish to officially name it). Members were first assigned by Robeck in 1956 and Stewart in 1957. An overview was created by Poole and Stewart in 1964. Sikich revised the unit and assigned more members assigned in 1965. The areal extent of the unit was mapped by Wilson and Stewart in 1967. In 1972 the areal limits were modified and an overview created by Stewart and others (they published a revision the same year). Kelley assigned more members and revised the unit in 1972. Lucas and Hayden did the same thing in 1989. The Rock Point Member was assigned by Dubiel in 1989. The Chinle was raised to group status by Lucas in 1993, thus also raising many of the members to formation status. He also included the formations of the Dockum Group of eastern New Mexico and west Texas within the Chinle Group. This modified nomenclature is controversial; many still retain the Chinle as a formation and separate out the Dockum Group (e.g., USGS). Overviews were created by Dubiel and others (1992) and Hintze and Axen (1995).For the whole section, except where noted: GEOLEX database Bibliographic References


SUBUNITS

Group rank (alphabetical - rank and formations not recognized by the USGS):GEOLEX database
  • San Pedro Arroyo Formation (NM),

  • Santa Rosa Formation (NM),

  • Shinarump Formation (NM).

  • Petrified Forest Formation (AZ, UT, NM)

  • Many others - see members below


Formation rank (alphabetical - several members not recognized by the USGS):GEOLEX database
  • Agua Zarca Sandstone Member (NM),

  • Bluewater Creek Member (AZ,CO,NM),

  • Church Rock Member (AZ---,CO---,UT---),

  • Correo Sandstone Member (NM),

  • Cuervo Sandstone Member (NM),

  • Duffin Sandstone Member (UT),

  • Gartra Member (CO---,UT---),

  • Mesa Redondo Member (AZ---,NM---),

  • Monitor Butte Member (AZ---,CO---,UT---),

  • Moss Back Member (AZ---,CO---,UT---),

  • Newspaper Rock Sandstone Bed (AZ),

  • Owl Rock Member (AZ---,NM---,UT---),

  • Petrified Forest Member (AZ---,CO---,NV---,NM---,UT---),

  • Poleo Sandstone Lentil (NM),

  • Redonda Member (NM),

  • Rock Point Member (AZ---,NM---),

  • Salitral Shale Tongue (NM---),

  • Shinarump Member (AZ---,NV---,NM---,UT---),

  • Silver Reef Sandstone Member (UT),

  • Stanaker Member (UT),

  • Temple Mountain Member (UT---),

  • Trail Hill Sandstone {Link without Title} (UT).



PLACES FOUND

Geologic Province:GEOLEX database

Parklands (incomplete list):


REFERENCES


Works cited



Notes