U.S. DEPARTMENT OF THE INTERIOR PROFESSIONAL PAPER 1419 U.S. GEOLOGICAL SURVEY Geology, hydrogeology, and hydrology of the South-coast groundwater province between Ponce and Patillas, Puerto Rico—PLATE 1 Renken, Robert A., and others, 2002, Geology and hydrogeology of the Caribbean Islands- aquifer system of the Commonweatlh of Puerto Rico and the U.S. Virgin Islands 66°37'30" 30' 22'30" 15' 07'30" 65°00' 66°37'30" 30' 22'30" 15' 07'30" 65°00' 18°07'30" UTUADO Río Río BARRANQUITAS VILLALBA JAYUYA Usabón Cerrillos AIBONITO Cayey COMERÍO EXPLANATION Río Santa Domingo Fault Lago Jauca Real Inabón COAMO CAYEY OROCOVIS Extent of fan-delta plain Río M Guayabal Matón Río Tibes aragu Río CAGUAS Lago Loíza Abajo Paraiso Vaca Santa San Machuelo Chicito Lago Toa Vaca Río El Guineo CIDRA ez Patricio Río –20 Structure contour—Shows altitude of base of fan-delta sequence of Fault Fault Lago Río Turabo SAN PONCE Río Carite San de Qaternary age. Contour interval, in meters, is variable. Datum is de Pascuas Fault Cúyon Coamo la Fau FaultLago Guayabal Coamo Lapa Toa Plata LORENZO Fault lt Patricio Río sea level Río Vista Portugués Río Río Fault Lago Río ío Alegre Lago o Río R Guavate R Río Num Portugués AIBONITO D Río Río ío Bartolom am Vásquez Jacaguas Emajagua Canas 2 U Ponceña Fault—U, upthrown side; D, downthrown side. Dashed where infered JUANA DÍAZ Grande Co Río Río U Lago Río Guayo D Juana Díaz Grande ° Río Lago Yuca Num 1 Los Llanos 18 07'30" VILLALBA Fault Chiquito Fault ei Garzas 70 Juana Díaz ? Jajome Cerrillos Río Fault—Shows direction of movement. Dashed where inferred Lago D Río Fault Canal Jueyes Majada Cayey Fault Num 5 U Cañas Río PATILLAS Quebrada Ju ? Descalabrado eye Inabón 60 30 A s Fault Santa Domingo Fault Magueyes Lago bajo Río Lago COAMO Bucaná D U Real CAYEYFault—Sawteeth on upper plate. Dashed where inferred San Lago50 CañasFa Río M M Marcos Río Cañas ult Las Flores U U Guamaní de Guayabal atón Pastillo U 40 Giles U E D Río Tibes ar La Torre sm Abajo ag Paraiso Fault Fault Abajo e D Machuelo San San D de ra D Chicito u Lago Toa Vaca R 40 ld ez Patricio Well—Control point ío Lago a ta Fault Lago 30 Aguilita Sabana Llana Río PONCE Río Bronce 30 D D Lago Pa Cúyon Carite Portugués Fault U Fault U s Fau Fault Coamo Lapa de U 50 Patillas cu Lago Guayabal 20 D Juana D SALINAS Fault lt Well completed in bedrock of pre-Quaternary age Río as 20 Río Río Vista U 40 Díaz Lago U Portugués Lago Río 20 Ponce Seco Canal Fau Alegre Lago o 10 Coamo Nígua PortuguésRío lt Num 10 Río Jacaguas D D U Patillas am Vásquez Inabón Patillas Barto Canas U Ponceña Río 40 2 JUANA DÍAZ Well completed in sediment deposits of Quaternary age Agua 30 Paso Seco 50 D de Co Río Río U Lago D Río 40 Cimarrona GUAYAMA ARROYO Lago Juana Díaz G Río lom Yu Los Llanos ° Matilde 20 Canal Guamaní ca Num 1 rande 18 00' Río Coamo Fa Chiquito Fault ei Garzas ult Juana Díaz ? Jajome 30 Río Pastillo 30 de 70 Lago 60 Canal D Majada Tuque SANTA ISABEL Guamaní Este Fault Jueyes 10 Río Oeste Patillas Fault Num50 5 U Cañas Río J PATILLAS 2 Quebrada ? 0 40 40 Descalabrado 50 30 ueye Florida de 50 60 de 30 Aba s F 5 Río 10 Las 20 Corazón Magueyes Lago 30 au Río Laguna Canal Patillas Lago Melanía Bucaná jo D lt U Canal 40 Lago CañasF Playita de Salinas 20 San au Las Flores U Guamaní d Ochenta 40 Marcos 20 Río Cañas 50 U Río de las Salinas Pastillo U Giles lt U E D e Playa de Ponce Guayama 10 La Torre sm 10 Cortada 5 Fault 30 20 Abajo e D 10 Coquí 30 D 30 de r D 5 Playa de 30 Puerto Patillas Río 10 10 al Santa Lago30 da 40 U Canal Arroyo 0 10 Salinas 20 20 Aguilita Isabel Jauca ía de Rinc Río Bronce 0 D D Sabana Llana Lago D ah ó 20 10Portugués 0 30 Punta B n 20 0 U Fa U 50 5 10 Central de 0 20 ult U ío Patillas Cayo U 10 Las Jobos Central Puerto Arroyo 5 10 D Juana D SALINAS 10 U Río –10 R Peñoncillo Playa de Bahía Jobos 40 Jacaboa 5 D Aguirre 10 U 0 U Díaz Lago U Cardona 20 Punta Mareas Machete Ponce D –50 20 Seco Canal 5 Santa Isabel Punta –10 10 20Coamo 20 U Nígua30 10 D Río Jacaguas D D Patillas 5 Aquila D Río Inabón Patillas 200 20 Baja D –40 10 D Río 30 Punta Arenas Figuras A U U –50 10Paso Seco U de U 20 GUAYAMA D U 5 gua U 0 Cimarrona ARROYO Tasmanian 10 –20 Río 20 Matilde 30 20 D 5 ° D D –100 –30 20 Canal Guamaní D 18 00' 0 Río Coamo 20 Fault 20 Punta 10 –60 10 –40 10 Río 10 U 10 –40 Pastillo 0 D de Este Tuque rida Cayo Cayos –20 –80 U SANTA ISABEL 10 Guamaní atillas 10 Petrona –50 –200 –10 Río –20 Oeste P 30 Cayo 30 U 0 –10 –20 de Ratones 10 –10 D Berberia Punta –60 Flo U de de 20 P O N C E B A S I N 20 –100 Las –30 30 50 Cayo de Puerco 200 Laguna –30 Río Canal–30 Patillas Corazón 0 Bajo 10 Ola Grande D 0 Lago Melanía 40 Canal 20 20 Playita de Ochenta Salinas –20 Cayos Parajos Cayos Caribes de las Salinas –120 10 U –10 20 0 Tasmanian Playa de Ponce Cortada –300 –40 –10 0 Guayama –20 –10 –30 Caya de Muertos Fault Cabezazos U 0 30 10 10 Platform Cayos de Barca Playa de –50 Coquí –10 D –20 10 – Puerto Patillas 20 Santa D 0 U –10 20 U Canal –60 –100 –20 0 10 0 Arroyo –400 e R Salinas Río D D U D Isabel Jauca hía d incó –70 30 –30 D 20 Punta Ba n – –20 U D –10 U –10 30 200 –80 D Central –50 U D Cayo D LasU –120 Jobos Central Puerto Arroyo Isla Caja Peñoncillo Playa de Bahía Job D–60 U–20 ault –50 Aguirre –30 D U U Cardona n F Punta Mareas –140 Machete de Muertos Santa Isabel –40 U D U Punta C A R I B B E A N S E A ania Aquila PONCE BASIN U os D D U Figuras asm Punta Arenas D –20 30 U Caya de MuertosD FaultU D 10 aja T D –30 B D Punta ° U U 17 52'30" 30 Cayo Cayos 20 30 Petrona Cayo Berberia de Ratones Punta Cayo de Puerco Ola Grande 30 Cayos Parajos Cayos Caribes 30 Cabezazos 200 Cayos de Barca 200 200 Isla Caja 200 de Muertos C A R I B B E A N S E A ° Base from U.S. Geological Survey 1:100,000 quadrangles: 0 2 46810 KILOMETERS Modified from Glover, 1971; Krushensky and Monroe, 1975, 1978; Beach and Trumbull, 1981 17 52'30" Arecibo, 1980, unpublished; and Humacao, 1979, unpublished Base from U.S. Geological Survey 1:100,000 quadrangles: 0 2 46810 KILOMETERS Arecibo, 1980, unpublished; and Humacao, 1979, unpublished 012345 MILES 012345 MILES EXPLANATION Deposits of Quaternary age Deposits of Oligocene to Pliocene (?) age 20 Contour—Shows altitude of fan-delta plain, in meters above E. INTERPRETIVE STRUCTURE AND MAJOR LINEAMENTS OR FAULTS UNDERLYING THE FAN-DELTA PLAIN sea level. Contour interval is variable Subaerial zone Marine zone Coastal zone Ponce Limestone 20 Contour—Shows altitude of Muertos shelf, in meters above Fan-delta plain Inner shelf Marsh or swamp Juana Díaz Formation (limestone and chalk) sea level. Contour interval is variable. Dashed where approximately located. Hachures indicate depression Alluvium Ponce shelf basin Beach Juana Díaz Formation (clastic sediments) D Fault—U, upthrown side; D, downthrown side. Dashed where U Colluvium Outer shelf Nearshore Rocks of Paleocene to Eocene age approximately located 66°37'30" 30' 22'30" 15' 07'30" 65°00' UTUADO Terrace Shelf slope Tuffaceous sandstone, siltstone, lava and limestone Fault—Shows direction of horizontal movement. Dashed JAYUYA BARRANQUITAS Usabón where approximately located COMERÍO EXPLANATION Jauca Live reef Rocks of Tertiary and Cretaceous age ADJUNTAS OROCOVIS Outcrop or shallow subcrop of South Coast aquifer Fault—Sawteeth on upper plate. Dashed where approximately Río Río CAGUAS Lago Loíza Carbonate bank and reef Igneous rocks located El Guineo Vaca CIDRA Río Río 21 Potentiometric contour—Shows altitude at which water would have Turabo SAN San de stood in tightly cased wells open to the South Coast aquifer in de Submerged reef Rocks of Cretaceous age Contact—Dashed where approximately located Coamo la Plata Patricio Toa February 1968. Dashed where approximately located. HachuresLORENZO R Río ío Río ío Lava, lava breccia, bedded volcaniclastic rocks, minor limestone Río R indicate depression.Guavate Contour interval, in meters, is variable.R AIBONITO Río Río ío Jacaguas Datum is sea level Emajagua Grande 18°07'30" Guayo VILLALBA Río Cerrillos Río A. GEOLOGY OF THE SOUTH COAST GROUND-WATER PROVINCE Cayey Río Inabón Lago COAMO Río Guayabal Matón PENUELAS Tibes Lago Toa Vaca CAYEY Lago Río PONCE Río Cúyon Carite Lago Guayabal Coamo Lapa Río Vista Portugués Lago Río Alegre Lago o Río Num Tallaboa Ponceña Vásquez Canas 2 JUANA DÍAZ oam C Río Río Lago Río Juana Díaz G Num 1 Los Llanos ra Río Chiqu Juana Díaz Lago Jajome nde Canal Jueyes Majada Num 5 ° ° Quebrada 66 37'30" 30' 22'30" 15' 07'30" 65 00' ito Descalabrado UTUADO PATILLAS Magueyes Lago Río Bucaná Lago Cañas BARRANQUITAS Las Flores Guamaní d 30 Río Cañas Río JAYUYA Usabón Pastillo Giles e COMERÍO EXPLANATION 24 La Torre 15 Abajo Río 21 de Jauca Lago 15 ADJUNTAS Area underlain by clastic sediment equivalent to the Ponce Limestone 18 Aguilita 18 Río OROCOVIS 12 15 Bronce 12 Sabana Llana Lago CAGUAS –1.5 Río Portugués 12 Lago Loíza de Vaca 9 9 6 12 Juana SALINAS ío Patillas El Guineo CIDRA 9 Río R Río Río Area underlain by carbonate rocks of the Ponce Limestone and/or the 15 Lago Jacaboa Ponce 6 3 9 Díaz 30 Canal Turabo SAN 6 Coamo Nígua Seco de 6 1.5 de Río San Juana Díaz Formation 3 Jacaguas 1.5 3 24 Patillas Coamo la Río 1.5 3 Inabón 21 Patillas Plata LORENZO Agua Paso Seco 24 de Río Patricio Toa –3 18 18 Cimarrona GUAYAMA ARROYO 12 Río Río Río ° Matilde Canal Río Guamaní 18 00' Tallaboa Río Coamo 18 9 Río Río Area underlain Guavateby clastic sediments of the Juana Díaz Formation 0 0 15 R Pastillo –1.5 Río de Río Río ío Jacaguas AIBONITO Emajagua Tuque SANTA ISABEL 12 9 12 Guamaní Este27 atillas 0 Río Oeste P Grande 1.5 –3 6 9 24 6 Guayo –3 18°07'30" Río 0 Florida Las 3 de de 21 3 VILLALBA Area underlain by volcanic, sedimentary, and igneous rocks of the Laguna Río Canal6 24 Patillas27 Corazón 18 1.5 0 1.5 Lago Melanía Canal 15 12 Cerrillos Playita de Ochenta Salinas 18 21 9 Río Cretaceous and early Tertiary age Río de las Salinas 0 1.5 15 6 Cayey Playa de Ponce Cortada 12 Guayama –1.5 –1.5 3 9 3 Inabón 0 0 0 Playa de Coquí Lago Santa 6 1.5 COAMO –20 CAYEYBedrock contour—Shows altitude of base of fan-delta deposits of Canal Salinas 0 3 Arroyo Puerto Patillas Río Matón Guayabal Isabel Jauca hía de Rinc 1.5 Río Tibes Punta 0 Ba ón PENUELAS Qaternary age.