Mona

Isla

Culebra

Isla de

Isla de

Vieques

St.

Thomas

St.

 John

St. Croix

Puerto Rico

C A R I B B E A N S E A

A T L A N T I C O C E A N

North Coast ground-water province





     Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

Lag La

Torrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina

? ? ?

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

Transmissivity, in meters squared per day Insufficient data Greater than 100 50 to 100 Less than 50

Contact—Southern extent of rocks of Middle Oligocene to Pliocene ageArea of outcrop or shallow subcrop

Dashed where approximately located, queried where uncertain

Well control point

? Data from Torres-Gonzáles, written commun., 1991

I. DISTRIBUTION OF TRANSMISSIVITY IN THE LOWER AQUIFER

Southern extent of

upper aquifer

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina ? ? ?

?

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

 Insufficient data Greater than 300 30 to 300 Less than 30Apparent hydraulic conductivity (K'), in meters per day

Contact—Southern extent of rocks of Middle Oligocene to Pliocene age

Dashed where approximately located, queried where uncertain

Well control point—Transmissivity, in meters squared per day

?

H. DISTRIBUTION OF HYDRAULIC CONDUCTIVITY IN THE UPPER AQUIFER

Data from Torres-González, written commun., 1991

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina ? ?

?

?

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

Transmissivity, in meters squared per day 1,000 to 10,000 100 to 1,000 Less than 100 Contact—

Southern extent of rocks of Middle Oligocene to Pliocene age

Dashed where approximately located, queried where uncertain

Well control point—Transmissivity, in meters squared per day

?

 Insufficient data Greater than 10,000

G. DISTRIBUTION OF TRANSMISSIVITY IN THE UPPER AQUIFER

Data from Torres-González, written commun., 1991

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina

–300

–100

–200

0

100

200

–100

–200

–300

–400

0

100

200

–400

–300

–200

–100

0

100 100

0

–100

–200

–300

–500

–100

–200

–300

Southern extent of

upper aquifer

? ? ?

? ? ?

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

Structure contour—Area of outcrop

Shows altitude of the top of the middle confining

 meters. Datum is sea level unit. Dashed where approximately located. Contour interval 100

100 Contact— 

Southern extent of rocks of Middle Oligocene to Pliocene age

Dashed where approximately located, queried where uncertain

Well control point

?

F. TOP OF THE MIDDLE CONFINING UNIT

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

Lag La

Torrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina

50

50

100

150

150

100 50

150

100

50

100

150 100

? ? ?

?

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

 100 to 150 50 to 100 Less than 50Estimated thickness of freshwater lens, in meters 50

?

 Insufficient data Greater than 150

 upper limestone aquifer—Line of equal thickness of the freshwater lens within the

Contour interval 50 meters.

Line showing landward limit of saltwater Guyben-Herzberg relations upper aquifer (Renken and Gómez-Gómez, 1994), and measurements, the 1987 potentiometric surface of the Estimates of thickness are based on specific conductivity Contact— 

Southern extent of rocks of Middle Oligocene to Pliocene age

Dashed where approximately located, queried where uncertain

Well control point—Specific conductivity well measurements used to determine the depth to the freshwater-saltwater interface

E. ESTIMATED THICKNESS OF THE FRESHWATER LENS WITHIN THE UPPER AQUIFER

BARCELONETA

FLORIDA

ARECIBO

VEGA BAJA

VEGA ALTA

MOROVIS

CIALES

COROZAL

UTUADO

ADJUNTAS

JAYUYA

OROCOVIS

MANATÍ

Santana

La Esperanza

Garrochales

Norte

Coto

Montebello

A T L A N T I C O C E A N

Lago

Caonillas

Caonillas

de

Tanamá

Grande de

Arecibo

Arecibo

Yunes

Toro

Negro

Grande

de

de

Bauta

Lago

Dos Bocas

Laguna

Tortuguero

Indio

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Río

Limón

Manatí

Manatí

Marulias

Lago de

Pellajas

Viví

Sana Muerto

Orocovis

Tiburónes

Caño

Grande

Grande

Cibuco

Morovis

Vega Baja

Ciales

Arecibo

Barceloneta

Manatí

Florida

Río Encantado

cave system

75

100

125

150

175

200

50

15

30

50

75

100

125

50

75

30

15

150

150

125

100

75

50

30

50

175

150

100

75

50

30

50

75

100

30

5

4

8b

7 6

2

3

8a

A

A

A

AA AA

A

A

A

A

A1

66°45' 66°30' 66°22'30" 66°37'30"

18°15'

18°22'30"

18°30'

and Humacao, 1979, unpublished1:100,000 quadrangles: Arecibo, 1980, unpublished,Base modified from U.S. Geological Survey Modified from Renken and Gómez-Gómez, 1994

0 5 10 20 KILOMETERS

0 5 10 MILES

15

EXPLANATION

Potentiometric contour—Outcrop or shallow subcrop of lower aquifer

Shows altitude at which water would have

Contact—Southern extent of rocks of Middle Oligocene to Pliocene ageLimit of cave system Datum is sea level where approximately located. Contour interval, in meters, is variable.  stood in tightly cased wells open to the lower aquifer in 1987. Dashed

Dashed where approximately located

Well—Control pointSpring and identification number—See table 1

A

15

6

D. POTENTIOMETRIC SURFACE OF THE LOWER AQUIFER IN THE AREA OF GREATEST DEVELOPMENT

(RÍO GRANDE DE ARECIBO TO CIBUCO) SHOWING AVERAGE CONDITIONS DURING 1987

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

anatí M

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina

10

15

30

75

50

100

125 150175

200

30

50

75

100

125

150

175

250

200

300

350

300

250

200

175

150

150

125

100

75

50

30

30 10

50

75

100

125

150

30 50 75

100

125

150

175

150

100

75

50

30

30

50

75

100

15

10

10

50

30

10

10

10

15

Extent of lower aquifer is unknown

? ? ?

9

5 4

8b 7

6

2

3

8a

1

A

A

A

AA

AA

A

AA

AA

A

A

A

A

A

A

L

Río Encantado

cave system Río Camuy cave system

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

Potentiometric contour—Outcrop or shallow subcrop of lower aquifer

Shows altitude at which water would have stood in tightly cased wells open to the lower aquifer before development.

Contact—Southern extent of rocks of Middle Oligocene to Pliocene ageLimit of cave system Dashed where approximately located. Contour interval, in meters, is variable. Datum is sea level

Dashed where approximately located, queried where uncertain

Well—Control point

Spring and identification number—Surface-water measurement site

See table 1

15

A6

L

?

C. ESTIMATED PREDEVELOPMENT POTENTIOMETRIC SURFACE OF THE LOWER AQUIFER

Modified from Renken and Gómez-Gómez, 1994

Culebrinas

Río

R

ío Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

anatí M

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina

200

150

100

50

30

15

5 3

1 0.3

150

100

50

30

15

5

3

1

0.3

30

15

5 3

1 0.3

0

30

15

5

3

3

5

5 3 1

0.3

15

30

15

5

3

1

0.3

3015 5

3 1

0.3 ?

? 0.3

1

3 5

?

1

3

5

? ?

? ? ?

?

12

13

13a

13b

15

11

10

9

8

7

6 5 4

3 2

14 1

A

A

AA

A

A

AA

A

A

AA

AAAAAAAAA

A

AA

A

A

AAA

A

A

A

AA

AA

A A

A

A

AA

A

A

L

L

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

EXPLANATION

Potentiometric contour—Outcrop or shallow subcrop of upper aquifer

Shows altitude at which water would have stood in tightly cased wells open to the upper aquifer between 

Contact—Southern extent of rocks of Middle Oligocene to Pliocene age in meters, is variable. Datum is sea level 1980 and 1990. Dashed where approximately located, queried where uncertain. Hachures indicate depression. Contour interval,

Dashed where approximately located, queried where uncertain

Well—Control point

Spring and identification number—Surface-water measurement site

See table 1

15

L

?

A6

?

B. ESTIMATED POTENTIOMETRIC SURFACE OF THE UPPER AQUIFER (AVERAGE CONDITIONS BETWEEN 1980 AND 1990)

Modified from Renken and Gómez-Gómez, 1994

Culebrinas

Río

Río Grande

de

Añasco

Río

Guajataca

Lago Guajataca

Río Camuy

Río

Tanamá

Bocas

Dos

Lago

Lago

Caonillas

Río

Grande de Arecibo

Río

Grande

de

Manatí

Laguna

Tortuguero

Río

Indio

Río Cibuco

Río

la Plata

Lago de

de la

Plata

Río

de

Bayamón

ha B i a ed San

Juan

T

Laguna La

orrecilla

Laguna de

Pinoñes

Río

Piedras

Laguna

San José

Lago las

Curias

Lago de

Loíza

Río

Grande de

Loíza

Río

Herrera

Río

Grande

Río

Espíritu

Santo

A T L A N T I C O C E A N

Canal Principal

de

Diversion

Río

Sanador

Río Toro

Negro

Punta Vacía

Talega

Cabra

Isla de

Punta

Salinas

Nueve

Puerto

Peñon

Punta

Punta

Higuero

RICÓN AGUADA

AÑASCO

MOCA

AQUADILLA ISABELA

SAN SEBASTIAN

QUEBRAD LI AL S

LARES

CAMUY

HATILLO

UTUADO

ARECIBO

CIALES

FLORIDA

BARCELONETAMANATÍ

JAYUYA

MOROVIS

BAJA

VEGA

ALTA

VEGA

COROZAL

DORADO

ALTA

TOA

NARANJITO

BAJA

TOA

BAYAMÓN

AGUAS BUENAS

YAUG AN OB

CAGUAS

JUAN

SAN CATANO

TRUJILLO

ALTO

CAROLINA

GURABO CANOVANAS

LOÍZA

RÍO

GRANDE

NAGUABO

Ciales

Florida

Morovis

Aguadilla

Moca

Rincón

Aguada

Quebradillas

Camuy

Lares

San Sebastían

Arecibo

Barceloneta

Vega Alta

Vega Baja

San Juan

Bayamón

Canóvanas

Río Piedras

Carolina N o r t h C o a s t g r o u n d - w a t e r p r o v i n c e

NC-11

NC-6

NC-10

CPR-1

NC-5

IAS-1

NC-4

NC-14 NC-9

NC-2

NC-13

NC-1

NC-3

NC-12 A'

A

0 5 10 20 KILOMETERS

0 5 10 MILES

15

66°00' 65°45' 66°30' 67°00'

18°30'

66°45' 66°15'

18°15'

67°15'

Arecibo, 1980, unpublished, and Humacao, 1979, unpublishedBase modified from U.S. Geological Survey 1:100,000 quadrangles:

Aymamón Limestone

Aguada (Los Puertos) Limestone

Cibao Formation (undiferentiated)

San Sebastián Formation

Montebello Limestone Member

Lares Limestone Mudstone unit

M

ucarabones Sand

Tqr

Undifferentiated rocks of Eocene, Pa el ocene, and Cretaceous age

T

Ta

Ts

Tlf

Tc

al

T

Ta

al

Tc

Tmu

Ts

Tlf

Tm

Tk

Tms

Tk

Ta

Tms Tc

Tal

Tq Qu Tq Qa Tq QuTa Tq Qu Tq Tq Qu Tq Qu Tq Qu Qa Qu Ta Qu Ta Qu Ta Qu Ta Qa Ta Qu Ta

Qu Qu Qa Qu Qa Qu Qu Qa Qu Qa Qu Qa Qu Qa Qu Qu

Río Guajataca

Río Camuy

Río Grande de Arecibo

Río Grande de Manatí

lagoon

lagoon

Río Indio

Río de la Plata

Río de Bayamón

Río San Juan

lagoon

canal

river

lagoon

Atlantic Ocean

NC-11 NC-6 NC-5

IAS-1 NC-14 NC-9 NC-2 NC-13 NC-1 NC-3 NC-12

0 5 10 20 KILOMETERS

0 5 10 MILES

15

500

Sea level

500

3,000

2,0001,000Sea level1,000

FEET

EAST

A' METERS

WEST

VERTICAL EXAGGERATION X 8.1

A

Geology modified from Ward and others, this report

EXPLANATION

 aquifer is uncertain Insufficient data, extent of lower Basal confining unit Lower aquifer Confining unit Upper aquiferNorth Coast limestone aquifer system Unsaturated, not an aquifer Local confining unit Alluvial-valley aquiferHydrogeologic units

 Montebello Limestone Member Río Indio Limestone Members Quebrada Arenas Limestone and Undifferentiated Cibao Cibao Formation Aquada (Los Puertos) Limestone Aymamón Limestone Quebradillas Limestone Surficial deposits, undifferentiated Alluvial depositsRock-stratigraphic units

WContactSouthern extent of rocks of Middle Oligocene to Pliocene ageLine of hydrogeologic section Cretaceous Age Undifferentiated rocks of Eocene, Paleocene, and San Sebastián Formation Lares Formation Mucarabones Sand Mudsone unit 

ell and identification number

Tm

Tqr

Tc

Tal

Ta

Tq

Qu

Qa Tms

Tmu

Tlf

NC-11

A A'

Tk

Ts

A. SECTION A–A' SHOWING PRINCIPAL AQUIFERS AND CONFINING UNITS OF THE NORTH COAST LIMESTONE AQUIFER SYSTEM

U.S. GEOLOGICAL SURVEYU.S. DEPARTMENT OF THE INTERIOR PROFESSIONAL PAPER 1419

Hydrogeology and hydrology of the North Coast Limestone Aquifer System, Puerto Rico—PLATE 5

Renken, Robert A., and others, 2002, Geology and hydrogeology of the Caribbean Islandsaquifer system of the Commonweatlh of Puerto Rico and the U.S. Virgin Islands

HYDROGEOLOGY AND HYDROLOGY OF THE NORTH COAST LIMESTONE AQUIFER SYSTEM, PUERTO RICO

By

Robert A. Renken, Fernando Gómez-Gómez, and Jesús Rodriquez-Martinez

2002