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Geologic Unit: Ortiz
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Map showing publication footprint
  • Usage in publication:
    • Ortiz Formation*
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
    • Shale
  • 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:

The Ortiz Formation, here named, consists of calcareous, thick-bedded coarse sandstone with interbeds of dusky-red shale at the base, overlain by thin conglomerate and varicolored volcanic sandstone and siltstone and pale-green tuff. Conformably overlies the Corozal Limestone; upper part is not exposed because of faulting. Maximum thickness is 600 m. Age is Paleocene or Eocene based on age of the Corozal.

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


Map showing publication footprint
  • Usage in publication:
    • Ortiz 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 Ortiz Formation occurs in eastern Puerto Rico and consists of volcanic sandstone, siltstone, tuff, and a basal conglomerate. Maximum thickness is 600 meters. The Ortiz is of Tertiary(?) 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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