Usage:
Juana Diaz Formation (PR*)
Geologic age:
Tertiary (early Oligocene to middle Miocene)*
Type section, locality, area and/or origin of name:
Named from exposures east of village of Juana Diaz and along the Rio Jacaguas to west, [Rio Descalabrado and Ponce quadrangles], south-central Puerto Rico (US geologic names lexicon, USGS Bull. 1200).
Reference localities: right bank of Rio Jacaguas just above concrete bridge on secondary road 1.4 km west-northwest of the plaza in Juana Diaz; high cliff on the right bank of Rio Jacaguas 2 km west-southwest of Juana Diaz, Ponce quadrangle, south-central Puerto Rico (Monroe, 1973).
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 ([ ]).