Leprocomio Siltstone Member of Guaynabo Formation (PR*)
Leprocomio Mudstone Member of Frailes Formation (PR*)
Late Cretaceous*
Outcrops near Leprocomio (Insular leper hospital) north of the bend in Rio Grande de Loiza at Trujillo Alto and in quarries east and west of Highway 181, San Juan quadrangle, northeastern Puerto Rico (Kaye, 1959).
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 ([ ]).