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National Geologic Map Database
Geologic Unit: Las Palmas
Map showing publication footprint
  • Usage in publication:
    • Las Palmas Hornblende Schist, Amphibolite
  • Modifications:
    • Named
  • Dominant lithology:
    • Schist
    • Amphibolite
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 Las Palmas Hornblende Schist and Amphibolite of the Bermeja Complex, here named, consists of foliated and unfoliated hornblende-plagioclase rocks that occur as tectonic blocks in sheared serpentinite, and as pebbles in conglomerates near the base of the Mayaguez Group. Age is Early 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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