Usage:
Guacio Member of Rio Culebrinas Formation (PR*)
Geologic age:
Tertiary*
Eocene, middle*
Type section, locality, area and/or origin of name:
Type locality: exposures along Route 433, immediately east of its junction with Route 119 (Puerto Rico Meter Grid System 93,200 E.; 50,600 N.), Barrio Guacio, Municipio de San Sebastian, San Sebastian quadrangle, northwestern Puerto Rico (McIntyre and others, 1970).
[The Puerto Rico Meter Grid System on west and east margins of 1958 ed. of San Sebastian topographic quadrangle are in error; see adjacent Central la Plata and Bayaney quadrangles.]
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 ([ ]).