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Map showing publication footprint
  • Usage in publication:
    • Tabonuco Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Mudstone
  • AAPG geologic province:
    • Caribbean region
Publication:

Seiders, V.M., 1971, Cretaceous and lower Tertiary stratigraphy of the Gurabo and El Yunque quadrangles, Puerto Rico, IN Contributions to stratigraphy, 1969: U.S. Geological Survey Bulletin, 1294-F, p. F1-F58.


Summary:

The Tabonuco Formation, here named, consists of thick-bedded gray volcanic sandstone and dark-gray mudstone. Conformably overlies older unnamed volcaniclastic rocks; conformably underlies the Hato Puerco Formation. Equivalent to the lower part of the Robles Formation. Thickness is 1,000 m. Age is Early Cretaceous (Albian) based on Foraminifera.

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


Map showing publication footprint
  • Usage in publication:
    • Tabonuco Formation*
  • Modifications:
    • Age modified
  • 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 Tabonuco Formation occurs in eastern Puerto Rico and consists of volcaniclastic sandstone, mudstone, minor volcanic breccia, and conglomerate. Approximately 1000 meters thick. The age of the Tabonuco is changed to Early and Late Cretaceous.

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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