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Map showing publication footprint
  • Usage in publication:
    • Mariquita Chert*
  • Modifications:
    • Named
  • Dominant lithology:
    • Chert
  • AAPG geologic province:
    • Caribbean region
Publication:

Mattson, P.H., 1973, Middle Cretaceous nappe structures in Puerto Rican ophiolites and their relation to the tectonic history of the Greater Antilles: Geological Society of America Bulletin, v. 84, no. 1, p. 21-38.


Summary:

The Mariquita Chert of the Bermeja Complex, here named, consists of fine-grained, greenish-gray or black, medium-bedded radiolarian chert, originally mudstone recrystallized into an aggregate of quartz with minor iron oxides. Thickness is unknown, at least 200-250 m. Intensely deformed. Age is pre-middle Cretaceous.

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


Map showing publication footprint
  • Usage in publication:
    • Mariquita Chert*
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Caribbean region
Publication:

Krushensky, R.D., and Monroe, W.H., 1978, Geologic map of the Yauco and Punta Verraco quadrangles, Puerto Rico: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1147, 1 sheet, scale 1:20,000


Summary:

Mariquita Chert revised not in Bermeja Complex and adopted for USGS. Age is upper Tithonian through Hauterivian.

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


Map showing publication footprint
  • Usage in publication:
    • Mariquita Chert*
  • Modifications:
    • Age modified
    • Biostratigraphic dating
  • AAPG geologic province:
    • Caribbean region
Publication:

Volckmann, R.P., 1984, Geologic map of the San German quadrangle, southwest Puerto Rico: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1558, 1 sheet, scale 1:20,000


Summary:

The Mariquita Chert in the Sierra Bermeja has been dated on the basis of Radiolaria as Tithonian to Aptian, and at San German to middle Turonian. The discrepancy in age suggests that deposition took place over more than 40 m.y. with the oldest deposits to the south.

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


Map showing publication footprint
  • Usage in publication:
    • Mariquita Chert*
  • 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 Mariquita Chert occurs in southwestern Puerto Rico and consists of laminated, fine-grained, dark-gray chert with abundant to sparse Radiolaria, and Foraminifera. Locally interbedded with recrystallized and largely silicified limestone(?) and nonmetamorphosed pillowed basalt. Maximum estimated thickness is 300 meters. The Mariquita is of Late Jurassic and Cretaceous age.

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


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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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