Usage:
Rio de la Plata Sandstone (PR*)
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Type section: exposures in the valley of the Rio Canas extending from its mouth to the Quebrada la Yegua fault (Puerto Rico Meter Grid System 172,985 E.; 55,680 N. to 172,425 E.; 55,470 N.), Naranjito quadrangle, Puerto Rico (Lidiak, 1965).
Named from Rio de la Plata River which flows across the rocks, Coamo-Guayama district, Puerto Rico (US geologic names lexicon, USGS Bull. 1200).
AAPG geologic province:
Caribbean region*
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 ([ ]).