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  • Usage in publication:
    • Cuchillas Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Volcanics
    • Sandstone
    • Siltstone
  • AAPG geologic province:
    • Caribbean region
Publication:

Nelson, A.E., 1966, Cretaceous and Tertiary rocks in the Corozal quadrangle, northern Puerto Rico, IN Contributions to stratigraphy, 1966: U.S. Geological Survey Bulletin, 1244-C, p. C9-C10.


Summary:

Rio Orocovis Formation redefined as a Group and Avispa Lava Member redefined as a Formation. A lenticular unit of interbedded volcanic breccia, sandstone, and siltstone that separates lava flows in the lower and upper parts of the Avispa is named the Cuchillas Member.

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 ([ ]).

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