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National Geologic Map Database
Map showing publication footprint
  • Usage in publication:
    • Magueyes Member*
  • Modifications:
    • Named
  • Dominant lithology:
    • Lava
    • Breccia
  • AAPG geologic province:
    • Caribbean region
Publication:

Berryhill, H.L., Jr., 1965, Geology of the Ciales quadrangle, Puerto Rico: U.S. Geological Survey Bulletin, 1184, 116 p.


Summary:

The Magueyes Member of the Rio Orocovis Formation [of Weaver (1964) and Lidiak (1965)] is here accepted for USGS use. Contains a lower sequence of amygdaloidal basaltic pillow lava, pyroclastic volcanic breccia, and lava flows, and an upper sequence of massive pillowed lava flows with lenticular layers of reworked(?) tuff. The sequences are separated by tuff of the basalt tuff member of the Rio Orocovis. Gradationally underlies the Perchas Lava Member. Age is Turonian(?) to late Santonian(?) or early Campanian.

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


Map showing publication footprint
  • Usage in publication:
    • Magueyes Formation*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Caribbean region
Publication:

Nelson, A.E., 1966, Cretaceous and Tertiary rocks in the Corozal quadrangle, northern Puerto Rico, IN Contributions to stratigraphy, 1966: U.S. Geological Survey Bulletin, 1244-C, p. C9-C10.


Summary:

Rio Orocovis Formation redefined Rio Orocovis Group and Magueyes Member redefined Magueyes Formation. Is lower unit of the Rio Orocovis; underlies the Perchas Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Magueyes Formation*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Caribbean region
Publication:

Briggs, R.P., 1969, Changes in stratigraphic nomenclature in the Cretaceous System, east-central Puerto Rico, IN Contributions to stratigraphy, 1968: U.S. Geological Survey Bulletin, 1274-O, p. O1-O31., Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration


Summary:

In the Barranquitas quadrangle the Magueyes Formation contains a basal member, the here named Barrancas Limestone Member (the limestone unit of formation L); a tuffaceous sandstone and siltstone unit (of formation L); a basalt lava unit that may be a tongue of the Perchas Formation, and strata correlated with the Cariblanco Formation. Overlies rocks tentatively correlated with the Torrecilla Breccia. Age is Early and Late Cretaceous.

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


Map showing publication footprint
  • Usage in publication:
    • Magueyes Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Caribbean region
Publication:

Krushensky, R.K., 2001, Geologic map of Puerto Rico with correlation chart and map unit descriptions, IN Bawiec, W.J., and others, Geology, geochemistry, geophysics, mineral ccurrences, and mineral resource assessment for the Commonwealth of Puerto Rico: U.S. Geological Survey Open-File Report, OF-98-38, scale 1:100,000


Summary:

The Magueyes Formation occurs in central Puerto Rico and consists of tuffaceous sandstone and siltstone intercalated with pillowed basaltic lava flows and flow breccia, and, near the top, a thick basaltic hyaloclastite breccia. The lowermost part of the formation is the Barrancas Limestone Member. Maximum estimated thickness of formation is 1400 meters. The age of the Magueyes is changed to Early Cretaceous.

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


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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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).