Usage:
El Ocho Formation (PR*)
Subunits:
Pina Siltstone Member*.
Geologic age:
Late Cretaceous*
Type section, locality, area and/or origin of name:
Type section: quarry north of El Ocho (Puerto Rico Meter Grid System 177,210 E.; 56,870 N.). Named from El Ocho, Barrio Buena Vista, Naranjito quadrangle, Puerto Rico (Pease, 1968).
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 ([ ]).