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Geologic Unit: Cayey
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  • Usage in publication:
    • Cayey siltstone member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Siltstone
  • AAPG geologic province:
    • Caribbean region
Publication:

Berryhill, H.L., Jr., and Glover, Lynn, III, 1960, Geology of the Cayey quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Investigations Series Map, I-319, 1 sheet, scale 1:20,000


Summary:

The Cayey Siltstone Member of the Robles Formation, here named, consists of laminated siltstone with layers of sandstone and volcanic breccia. Overlies the Rio Maton Limestone Member and is intertongued with the Lapa Lava Member of the Robles. Maximum thickness is 300 m. Age is Late Cretaceous or older.

Source: GNU records (USGS DDS-6; Reston GNULEX).


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 ([ ]).

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