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Map showing publication footprint
  • Usage in publication:
    • Guanajibo formation
  • Modifications:
    • Named
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Caribbean region
Publication:

McGuinness, C.L., 1948, Ground-water resources of Puerto Rico: Puerto Rico Aqueduct and Sewer Service, p. 226-227.


Summary:

Named Guanajibo formation for Guanajibo Channel, PR. Consists of a series of light-yellow to gray limestones, sandy or earthy and ranging from soft to fairly hard and sands, silts, and clays. Deepest well to end in these sediments is well Mg36 at 256 feet. Unit is of late Miocene or early(?) Pliocene.

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


Map showing publication footprint
  • Usage in publication:
    • Guanajibo Formation*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Caribbean region
Publication:

Krushensky, R.K., 2001, Geologic map of Puerto Rico with correlation chart and map unit descriptions, IN Bawiec, W.J., and others, Geology, geochemistry, geophysics, mineral ccurrences, and mineral resource assessment for the Commonwealth of Puerto Rico: U.S. Geological Survey Open-File Report, OF-98-38, scale 1:100,000


Summary:

The Guanajibo Formation occurs in southwest Puerto Rico and consists of calcarenite and calcirudite with local interbeds of lithic sandstone and conglomerate. Estimated thickness is 30 meters. The Guanajibo is of late Miocene age.

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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