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Bibliographic references for the geologic map of Puerto Rico

Anderson, R.N., 1991, Geophysical logs from the Toa Baja scientific drillhole, Puerto Rico: (Paper 91GL00392) Geophysical Research Letters, v. 18, no. 3, p. 497.
[http://dx.doi.org/10.1029/91GL00392]
Anderson, R.N., and Larue, D.K., 1991, Wellbore heat flow from the Toa Baja scientific drillhole, Puerto Rico: (Paper 91GL00391) Geophysical Research Letters, v. 18, no. 3, p. 537.
[http://dx.doi.org/10.1029/91GL00391]
Arnow, Ted, 1961, Water-bearing properties of the rocks in the Arecibo-Barceloneta area, Puerto Rico: U.S. Geological Survey Professional Paper 424-C, p. C201-C202.
[http://pubs.er.usgs.gov/publication/pp424C]
Asencio, E., Jr., 1980, Western Puerto Rico seismicity: U.S. Geological Survey Open-File Report 80-192, Reston, VA. Originally presented as author's thesis M.Sc., Colorado School of Mines, 135 p.
[http://pubs.er.usgs.gov/publication/ofr80192]
Avé Lallemant, H.G., 1991, Structural analysis of cores and cuttings from the Toa Baja (Puerto Rico) borehole: (Paper 91GL00410) Geophysical Research Letters, v. 18, no. 3, p. 557.
[http://dx.doi.org/10.1029/91GL00410]
Averitt, P., 1975, Coal resources of the United States, January 1, 1974: U.S. Geological Survey Bulletin 1412, Washington, D.C., p. 131.
[http://pubs.er.usgs.gov/publication/b1412]
Barabas, A.H., 1982, Potassium-Argon dating of magmatic events and hydrothermal activity associated with porphyry copper mineralization in west central Puerto Rico: Economic Geology, v. 77, p. 109-126.
[http://dx.doi.org/10.2113/​gsecongeo.77.1.109]
Barnes, H.H., and Bogart, D.B., 1961, Floods of September 6, 1960, in eastern Puerto Rico: U.S. Geological Survey Circular 451, 13 p.
[http://pubs.er.usgs.gov/publication/cir451]
Beach, D.K., and Trumbull, J., 1981, Marine geologic map of the Puerto Rico insular shelf, Isla Caja de Muertos area: U.S. Geological Survey Miscellaneous Investigations Map I-1265, scale 1:40,000.
[http://pubs.er.usgs.gov/publication/i1265]
Beach, D.K., and Trumbull, J.V.A., 1980, Marine geologic map of the Puerto Rico insular shelf Isla Caha de Muertos area: U.S. Geological Survey Open-File Report 80-366, Reston, VA, 21 p.
[http://pubs.er.usgs.gov/publication/ofr80366]
Bennett, G.D., 1976, Electrical analog simulation of the aquifers along the south coast of Puerto Rico: U.S. Geological Survey Open-File Report 76, Reston, VA, 101 p.
[http://pubs.er.usgs.gov/publication/ofr741010]
Berryhill, H.L., Jr., 1960, Geology of the Central Aguirre quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-318, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i318]
Berryhill, H.L., Jr., 1961, Ash-flow deposits, Ciales quadrangle, Puerto Rico, and their significance: U.S. Geological Survey Professional Paper 424-B, p. B224-B226.
[http://pubs.er.usgs.gov/publication/pp424B]
Berryhill, H.L., Jr., 1965, Geology of the Ciales quadrangle, Puerto Rico: U.S. Geological Survey Bulletin 1184, 116 p; with map, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/b1184]
Berryhill, H.L., Jr., and Glover, Lynn, III, 1960, Geology of the Cayey quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-319, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i319]
Bogart, D.B., Arnow, Ted, and Crooks, J.W., 1964, Water resources of Puerto Rico--A progress report: Puerto Rico Water Resources Bulletin 4, 120 p. Includes U.S. Geological Survey Map HA-197, Hydrogeologic map of Puerto Rico and adjacent islands by Reginald P. Briggs and John P. Akers.
[http://pubs.er.usgs.gov/publication/ha197]
Bowin, C.O., Nalwalk, A.J., and Hersey, J.B., 1966, Serpentinized peridotite from the north wall of the Puerto Rico Trench: Geological Society of America Bulletin, v. 77, no. 3, p. 257-270. Abstract Carl O. Bowin and Andrew J. Nalwalk, America Geophysical Union Transactions, v. 44, p. 120, 1963.
[http://dx.doi.org/10.1130/0016-7606(1966)77[257:SPFTNW]2.0.CO;2]
Briggs, R.P., 1964, Provisional geologic map of Puerto Rico and adjacent islands: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-392, scale 1:240,000.
[http://pubs.er.usgs.gov/publication/i392]
Briggs, R.P., 1965, Geologic map of the Barceloneta quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-421, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i421]
Briggs, R.P., 1967, The Malo breccia and Cotorra tuff in the Cretaceous of central Puerto Rico, in Cohee, G.V., West, W.S., and Wilkie, L.C., eds., Changes in stratigraphic nomenclature by U.S. Geological Survey, 1966: U.S. Geological Survey Bulletin 1254-A, p. A23-A29.
[http://pubs.er.usgs.gov/publication/b1254A]
Briggs, R.P., 1968c, Geologic map of the Arecibo quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-551, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i551]
Briggs, R.P., 1969a, Changes in stratigraphic nomenclature in the Cretaceous system, east-central Puerto Rico: U.S. Geological Survey Bulletin 1274-O, Washington, D.C., 31 p.
[http://pubs.er.usgs.gov/publication/b1274O]
Briggs, R.P., 1971a, Geologic map of the Orocovis quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-615, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i615]
Briggs, R.P., 1973, The Lower Cretaceous Figuera Lava and Fajardo Formation in the stratigraphy of Northeastern Puerto Rico: U.S. Geological Survey Bulletin 1372-G (Washington), p. 10.
[http://pubs.er.usgs.gov/publication/b1372G]
Briggs, R.P., 1974, Geologic Setting and evaluation of Cave - Phosphate deposits, Isla de Mona Quadrangle, Puerto Rico, with notes on other resources: U.S. Geological Survey Open-File Report 74-226, Washington, D.C.
[http://pubs.er.usgs.gov/publication/ofr74226]
Briggs, R.P., and Aguilar-Cortes, E., 1980, Geologic map of the Fajardo and Cayo Icacos quadrangles, Puerto Rico: U.S. Geological Survey Miscellaneous Investigations Map I-1153, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i1153]
Briggs, R.P., and Akers, J.P., 1965, Hydrogeologic map of Puerto Rico and adjacent islands: U.S. Geological Survey Hydrologic Investigations Atlas Map HA-197, scale 1:240,000.
[http://pubs.er.usgs.gov/publication/ha197]
Briggs, R.P., and Gelabert, P.A., 1962, Preliminary report on the geology of the Barranquitas quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-336, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i336]
Briggs, R.P., and Pease, M.H., Jr., 1960, Compressional graben and horst structures in east-central Puerto Rico: U.S. Geological Survey Professional Paper 400-B, p. B365-B366.
[http://pubs.er.usgs.gov/publication/pp400B]
Briggs, R.P., and Seiders, V.M., 1972, Geologic map of the Isla de Mona quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-718, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i718]
Broedel, C.H., 1961, Preliminary geologic map showing iron and copper prospects in the Juncos quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-326, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i326]
Bunce, E.T., and Fahlquist, D.A., 1962, Geophysical investigation of the Puerto Rico Trench and Outer Ridge: Journal of Geophysical Research, v. 67, no. 10, p. 3955-3972.
[http://dx.doi.org/10.1029/JZ067i010p03955]
Bunce, E.T., and Hersey, J. B., 1963, Continuous seismic profiles of the Outer Ridge and Nares Basin north of Puerto Rico: Geological Society of America Bulletin, v. 77, no. 8, p. 803-811.
[http://dx.doi.org/10.1130/0016-7606(1966)77[803:CSPOTO]2.0.CO;2]
Campbell, R.H., Herd, D.G., and Alonso, R.M., 1985, Preliminary response activities and recommendations of the USGS hazard research team to the Puerto Rico landslide disaster of October 7, 1985: U.S. Geological Survey Open-File Report 85-719, Reston, VA, 13 p.
[http://pubs.er.usgs.gov/publication/ofr85719]
Carr, M.E.S., and Dutton, C.E., 1959, Iron-ore resources of the United States, including Alaska and Puerto Rico, 1955: U.S. Geological Survey Bulletin 1082-C, Washington, D.C., 134 p.
[http://pubs.er.usgs.gov/publication/b1082C]
Carver, D.L., Turner, L.M., and Tarr, A.C., 1976, Puerto Rico seismological data report, August 16, 1974-June 30,1975: U.S. Geological Survey Open-File Report No. 76-369, Reston, VA, 41 p.
[http://pubs.er.usgs.gov/publication/ofr76369]
Case, J.E., 1981, Resource appraisal of Dominica, Lesser Antilles: U.S. Geological Survey Open-File Report No. 81-1157, Menlo Park, CA, 9 p.
[http://pubs.er.usgs.gov/publication/ofr811157]
Cho, M., 1991, Zeolite to prehnite-pumpellylte facies metamorphism in the Toa Baja drill hole, Puerto Rico: (Paper 91GL00409) Geophysical Research Letters, v. 18, no. 3, p. 525.
[http://dx.doi.org/10.1029/91GL00409]
Colon-Dieppa, E., and Gonzales, J.R., 1981, Ground-water levels in alluvium on the south coast of Puerto Rico, Feb. 1979: U.S. Geological Survey, Water Resources Division Open-File Report 81-0641.
[http://pubs.er.usgs.gov/publication/ofr81641]
Colony, R.J., and Meyerhoff, H.A., 1928, The copper prospect at Barrio Pasto, Porto Rico: Economic Geology, v. 23, p. 515-527.
[http://dx.doi.org/10.2113/​gsecongeo.23.5.515]
Cox, D.P., 1973, Porphyry copper deposits in Puerto Rico and their relation to arc-trench tectonics: U.S. Geological Survey Open-File Report 1860, p. 9; map.
[http://pubs.er.usgs.gov/publication/ofr7351]
Cox, D.P., 1985, Geology of the Tanama and Helecho porphyry copper deposits and vicinity, Puerto Rico: U.S. Geological Survey Professional Paper 1327, Washington, D.C., scale 1:40,000.
[http://pubs.er.usgs.gov/publication/pp1327]
Cox, D.P., and Briggs, R.P., 1973, Metallogenic map of Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-721, scale 1:240,000.
[http://pubs.er.usgs.gov/publication/i721]
Cox, D.P., Gonzales, I.P., and Nash, J.T., 1975, Geology, geochemistry and fluid-inclusion petrography of the Sapo Alegre porphyry copper prospect and its metavolcanic wallrocks, west central Puerto Rico: Journal of Research, U.S. Geological Survey, v. 3, no 3, p. 313-327.
[http://pubs.er.usgs.gov/publication/70007408]
Cox, D.P., Larsen, R.R., and Tripp, R.B., 1973, Hydrothermal alteration in Puerto Rican porphyry copper deposits: Economic Geology, v. 68, p. 1329-1334.
[http://dx.doi.org/10.2113/gsecongeo.68.8.1329]
Cox, D.P., Marvin, M'Gonigle, J.W., McIntyre, D.H., and Rogers, C.L., 1977, Potassium-Argon Geochronology of some metamorphic, igneous, and hydrothermal events in Puerto Rico and the Virgin Islands: Journal of Research of the U.S. Geological Survey, v. 5, no. 6, p. 689-703.
[http://pubs.er.usgs.gov/publication/70007423]
Cox, D.P., Perez, I., and Nash, J.T., 1975, Geology, geochemistry, and fluid-inclusion petrography of the Sapo Alegre Porphyry Copper prospect and its metavolcanic wallrocks, West-Central Puerto Rico: Journal of Research of the U.S. Geological Survey, v. 3, no. 3, p. 313-327.
[http://pubs.er.usgs.gov/publication/70007408]
Curet, A.F., 1986, Geologic map of the Mayagüez and Rosario quadrangles, Puerto Rico: U.S. Geological Survey Miscellaneous Investigations Series Map I-1657, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i1657]
Dart, R.L., 1980, Suggestions on the analysis of 16-mm seismic data from local networks: U.S. Geological Survey Open-File Report 80-990, Menlo Park, CA, 26 p.
[http://pubs.er.usgs.gov/publication/ofr80990]
Dart, R.L., and others, 1979, Puerto Rico seismic program seismological data summary, July 1, 1975-December 31, 1977: U.S. Geological Survey Open-File Report 79-870, Denver, CO, 138 p.
[http://pubs.er.usgs.gov/publication/ofr79870]
Dart, R.L., Tarr, A.C., Carver, D.L., and Wharton, M.K., 1980, Puerto Rico seismic network data report of earthquakes located by the programs HYPO71 and HYPOELLIPSE, July 1, 1975-December 31, 1977: Reston, VA, U.S. Geological Survey Circular 821, 43 p.
[http://pubs.er.usgs.gov/publication/cir821]
Diaz, J.R., 1979, Seawater intrusion, south coast of Puerto Rico, 1966-77: U.S. Geological Survey Open-File Report 79-1334, San Juan, PR, 19 p.
[http://pubs.er.usgs.gov/publication/ofr791334]
Diaz, J.R., and Jordan, D.G., 1985, Water resources of the Rio Grande de Añasco lower valley, Puerto Rico: U.S. Geological Survey Water Resources Investigations Report, 48 p.
[http://pubs.er.usgs.gov/publication/wri854237]
Douglas, R.C., 1961, Orbitolinas from Caribbean islands: Journal of Paleontology, v. 35, no. 3, p. 475-479.
[http://jpaleontol.geoscienceworld.org/content/35/3/475.abstract]
Dury, G.H., 1965, Theoretical implications of underfit streams: U.S. Geological Survey Professional Paper 452-C, p. C1-C43.
[http://pubs.er.usgs.gov/publication/pp452C]
Dutton, C.E., 1954, The iron deposits of North America, Cuba and Puerto Rico: U.S. Geological Survey Open-File Report 54-73, p. 44.
[http://pubs.er.usgs.gov/publication/ofr5473]
EEZ-Scan85 Scientific Staff, 1987, Atlas of the U.S. Exclusive Economic Zone, Eastern Caribbean: U.S. Geological Survey Investigations Map I-1864B.
[http://pubs.er.usgs.gov/publication/i1864AB]
Ellis, S.R., and Gomez-Gomez, F., 1976, Hydrologic characteristics of lagoons at San Juan, Puerto Rico, during a January 1974 tidal cycle: U.S. Geological Survey Water Resources Investigations No. 38-75, Ft. Buchanan, PR, 45 p.
[http://pubs.er.usgs.gov/publication/wri7538]
Erickson, J.P., Pindell, J.L., and Larue, D.K., 1991, Fault zone deformational constraints on paleogene tectonic evolution in southern Puerto Rico: (Paper 91GL00411) Geophysical Research Letters, v. 18, no. 3, p. 569.
[http://dx.doi.org/10.1029/91GL00411]
Ericson, D.B., Ewing, Maurice, Wollin, Goesta, and Heezen, B.C., 1961, Atlantic deep-sea sediment cores: Geological Society of America Bulletin, v. 72, no. 1, p. 193-285.
[http://dx.doi.org/10.1130/0016-7606(1961)72[193:ADSC]2.0.CO;2]
Ewing, J.I., and Ewing, Maurice, 1962, Reflection profiling in and around the Puerto Rico Trench: Journal of Geophysical Research, v. 67, no., 12, p. 4729-4739.
[http://dx.doi.org/10.1029/JZ067i012p04729]
Ewing, Maurice, and Worzel, J.L., 1954, Gravity anomalies and structure of the West Indies, Part 1: Geological Society of America Bulletin, v. 62, no. 2, p. 165-173.
[http://dx.doi.org/10.1130/0016-7606(1954)65[165:GAASOT]2.0.CO;2]
Fields, F.K., 1971, Floods in the Yabucoa area, Puerto Rico: U.S. Geological Survey, Hydrologic Atlas HA-382.
[http://pubs.er.usgs.gov/publication/ha382]
Fiske, R.S., 1969, Recognition and significance of pumice in marine pyroclastic rocks: Geological Society of America Bulletin, v. 80, p. 1-8.
[http://dx.doi.org/10.1130/0016-7606(1969)80[1:RASOPI]2.0.CO;2]
Foreman, H.P., 1966, Two Cretaceous radiolarian genera: Micropaleontology, v. 12, no. 3, p. 355-358.
[http://micropal.geoscienceworld.org/content/12/3/355.abstract]
Frondel, Clifford, 1943, Mineralogy of the calcium phosphates in insular phosphate rock: American Mineralogist, v. 28, no. 4, p. 215-232.
[http://www.minsocam.org/ammin/AM28/AM28_215.pdf]
Frost, C.D., and Schellekens, J.H., 1991, Rb-Sr and Sm-Nd isotopic characterization of Eocene volcanic and volcaniclastic rocks from Puerto Rico: (Paper 91GL00400) Geophysical Research Letters, v. 18, no. 3, p. 545.
[http://dx.doi.org/10.1029/91GL00400]
Gannett, H., 1901, A gazetteer of Puerto Rico: U.S. Geological Survey Bulletin 183, p. 51.
[http://pubs.er.usgs.gov/publication/b183]
Garrison, L.E., 1969, Structural geology of the Muertos insular shelf, Puerto Rico: U.S. Geological Survey Open-File Report 69-103, p. 8.
[http://pubs.er.usgs.gov/publication/ofr69103]
Garrison, L.E., Martin, R.G.J., Berryhill, H.L.J., Buell, M.W., Ensminger, H.R., and Perry, R.K., 1972, Preliminary tectonic map of the eastern Greater Antilles region: U.S. Geological Survey Miscellaneous Investigations Map I-732.
[http://pubs.er.usgs.gov/publication/i732]
Gemez-Gomez, F., 1984, Water resources of the lower Rio Grande de Manati valley, Puerto Rico: U.S. Geological Survey, scale 1:50,000.
[http://pubs.er.usgs.gov/publication/wri834199]
Giusti, E.V., 1978, Hydrogeology of the karst of Puerto Rico: U.S. Geological Survey Professional Paper 1012, Washington, D.C., 68 p.
[http://pubs.er.usgs.gov/publication/pp1012]
Giusti, E.V., and Bennett, G.D., 1976, Water resources of the north coast Limestone area, Puerto Rico: Water-Resources Investigations 42-75, Ft. Buchanan, PR, U.S. Geological Survey, 42 p.
[http://pubs.er.usgs.gov/publication/wri7542]
Glover, Lynn, III, 1961a, Preliminary report on the geology of the Coamo quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-335, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i335]
Glover, Lynn, III, 1961b, Preliminary geologic map of the Salinas quadrangle, Puerto Rico: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-337, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/i337]
Glover, Lynn, III, 1967a, Cuyón Formation of east-central Puerto Rico, in Cohee, G.V., West, W.S., and Wilkie, L.C., eds., Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1966: U.S. Geological Survey Bulletin 1254-A, p. A18-19.
[http://pubs.er.usgs.gov/publication/b1254A]
Glover, Lynn, III, 1967b, The Jacaguas Group in central-southern Puerto Rico, in Changes in stratigraphic nomenclature by the U.S. Geological Survey, 1966: U.S. Geological Survey Bulletin 1254-A, p. A29-A39.
[http://pubs.er.usgs.gov/publication/b1254A]
Glover, Lynn, III, 1967c, Geology of the Coamo area, Puerto Rico, with comments on Greater Antilles volcanic island arc-trench phenomena: Dissertation, Princeton University, 329p.
[http://www.worldcat.org/oclc/4674423]
Glover, Lynn, III, 1971, Geology of the Coamo area, Puerto Rico, and its relation to the volcanic arc-trench association: U.S. Geological Survey Professional Paper 636, Washington, D.C.
[http://pubs.er.usgs.gov/publication/pp636]
Glover, Lynn, III, 1983, Preliminary geologic map of Patillas and Guayama quadrangle, Puerto Rico: U.S. Geological Survey Open-File Report 82-1097, Reston, VA, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/ofr821097]
Glover, Lynn, III, and Mattson, P.H., 1960, Successive thrust and transcurrent faulting during the Tertiary in south-central Puerto Rico: U.S. Geological Survey Professional Paper 400-B, Washington, D.C., scale 1:40,000.
[http://pubs.er.usgs.gov/publication/pp400B]
Glover, Lynn, III, and Mattson, P.H., 1967, The Jacaguas group in central-southern Puerto Rico, in Cohee, G.V., West, W.S., and Wilkie, L.C., eds., Changes in stratigraphic nomenclature by U.S. Geological Survey, 1966: U.S. Geological Survey Bulletin 1254A, p A29-A39.
[http://pubs.er.usgs.gov/publication/b1254A]
Glover, Lynn, III, and Mattson, P.H., 1973, Geologic map of the Rio Descalabrado Q, Puerto Rico: U.S. Geological Survey I-735.
[http://pubs.er.usgs.gov/publication/i735]
Glover, Lynn, III, Pease, M.H., and Arnow, T., 1977, Surficial geologic map of the Playa de Ponce and Santa Isabel quadrangles, Puerto Rico: U.S. Geological Survey Miscellaneous Field Studies Map MF-886, scale 1:20,000.
[http://pubs.er.usgs.gov/publication/mf886]
Gomez-Gomez, F., 1983, Water resources of the lower Rio Grande de Mantí Valley, Puerto Rico: U.S. Geological Survey Water Resources Investigations Report 83-4199.
[http://pubs.er.usgs.gov/publication/wri834199]
Gomez-Gomez, F., and Gorman, S., 1982, Reconnaissance of ground-water quality throughout Puerto Rico, Sept-Oct. 1981: U.S. Geological Survey Water Resources Division Open-File Report 82-332.
[http://pubs.er.usgs.gov/publication/ofr82332]
Gomez-Gomez, F., and Torres-Sierra, H., 1988, Hydrology and effects of development on the water-table aquifer in the Vega Alta quadrangle, Puerto Rico: U.S. Geological Survey Water Resources Investigations Report 87-4105, San Juan, PR, 54 p.
[http://pubs.er.usgs.gov/publication/wri874105]
Gomez-Gomez, F., Quinones, F., and Ellis, S.R., 1983, Hydrologic characteristics of lagoons at San Juan, Puerto Rico, during an October 1974 tidal cycle: U.S. Geological Survey Water Resources Investigations Open-File Report 82-349, San Juan, PR, 34 p.
[http://pubs.er.usgs.gov/publication/ofr82349]
Gonzalez, L.A., 1991, Carbon and oxygen stable isotopes in the Toa Baja Well, Puerto Rico: Implications for burial diagenesis and hydrocarbon generation: (Paper 91GL00396) Geophysical Research Letters, v. 18, no. 3, p. 533.
[http://dx.doi.org/10.1029/91GL00396]
Gonzalez, L.A., and Ruiz, H.M., 1991, Diagenesis of Middle Tertiary carbonates in the Toa Baja Well, Puerto Rico: (paper 91GL00397) Geophysical Research Letters, v. 18, no. 3, p. 513.
[http://dx.doi.org/10.1029/91GL00397]
Gordon, W.A., 1961c, Miocene Foraminifera from the Lajas Valley, southwest Puerto Rico: Journal of Paleontology, v. 35, no. 3, p. 610-619.
[http://jpaleontol.geoscienceworld.org/content/35/3/610.abstract]
Gordon, W.A., 1961d, Planktonic Foraminifera and the correlation of the Middle Tertiary rocks of Puerto Rico: Micropaleontology, v. 7, no. 4, p. 451-460.
[http://micropal.geoscienceworld.org/content/7/4/451.abstract]
Gordon, W.A., 1963, Middle Tertiary echinoids of Puerto Rico, Journal of Paleontology, v. 37, no. 3, p. 628-642.
[http://jpaleontol.geoscienceworld.org/content/35/3/628.abstract]
Graves, R.P., 1989, Water resources of the Humacao-Naguabo area, eastern Puerto Rico: U.S. Geological Survey Water Resources Investigations Report 87-4088, San Juan, PR, 69 p.
[http://pubs.er.usgs.gov/publication/wri874088]
Griscom, Andrew, 1972, Complete Bouguer gravity map of eastern Puerto Rico and principal facts for gravity stations: U.S. Geological Survey Open-File Report 72-146.
[http://pubs.er.usgs.gov/publication/ofr72146]
Griscom, Andrew, and Geddes, W.H., 1966, Island-arc structure interpreted from aeromagnetic data near Puerto Rico and the Virgin Islands: Geological Society of America Bulletin 77, no. 2, p. 153-162.
[http://dx.doi.org/10.1130/0016-7606(1966)77[153:ISIFAD]2.0.CO;2]
Grossman, I.G., 1961, Ground-water conditions in the lower Tallaboa Valley, Puerto Rico: U.S. Geological Survey Professional Paper 424-C, p. C202-C203.
[http://pubs.er.usgs.gov/publication/pp424C]
Grossman, I.G., 1962, Stratigraphy and hydrology of the Juana Díaz formation in the Yauco area, Puerto Rico: U.S. Geological Survey Professional Paper 450-D, p. D62-D63.
[http://pubs.er.usgs.gov/publication/pp450D]
Grossman, I.G., 1963, Geology of the Guanica-Guayanilla Bay area, southwestern Puerto Rico: U.S. Geological Survey Professional Paper 475-B, p. B114-B116.
[http://pubs.er.usgs.gov/publication/pp475B]
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