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  • Usage in publication:
    • Rio Bauta Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Mudstone
    • Siltstone
    • Sandstone
    • Conglomerate
    • Limestone
Publication:

Briggs, R.P., 1969, Changes in stratigraphic nomenclature in the Cretaceous System, east-central Puerto Rico, IN Contributions to stratigraphy, 1968: U.S. Geological Survey Bulletin, 1274-O, p. O1-O31., Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration


Summary:

The Rio Bauta Member of the Pozas Formation, here named, consists of dark-gray and bluish-gray calcareous mudstone, siltstone, sandstone, conglomerate, and limestone that crop out in a restricted area of northern Orocovis quadrangle. Unconformably overlies volcanic rocks of the Rio Orocovis Group at the base of the Pozas; gradationally underlies the Blacho Tuff Member of the Pozas. Thickness is 100m. Age is late Santonian through Campanian.

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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