Dolomitic Dolosilt

 limestone

Siltstone

Calcareous 

 dolomite

Glauconite

Moldic porosity

Micritic

Phosphate

 (common or abundant;

 greater than 10%)

Chalky

Vuggy

 porosity

Pellets or 

 pelletal

Clayey Dolomitic

Breccia Organic 

 material

Shell Chert

Quartz sandstone

Limestone

Floatstone

Silty

No sample

Wackestone

Crystals or 

 crystalline

Primary lithology

Accessory lithologic components or modifiers

Quartz sand

Lime mudstone Shell bed

Sucrosic

Fossils or 

 fossiliferous Sandy

Grainstone

Intermediate confining unit

Middle semiconfining unit

Surficial aquifer system

Upper Floridan aquifer

Avon Park permeable zone

Lower Floridan aquifer 

 uppermost major 

 permeable zone 

Hydrogeologic unit Lithostratigraphic and sequence 

 stratigraphic unit upper boundaries

Dolomite

Clay

Packstone

Phosphatic

Conglomerate

Lower Floridan aquifer 

 confining unit

EXPLANATION

EXPLANATION FOR BOREHOLE GEOPHYSICAL DATA CURVES

Description Abbreviation for

geophysical tool or device

Unit of 

measure Description

1 Number indicates data collection interval number. 

2 (spliced) indicates more than one data collection interval is included. If intervals overlap, splicing was done at the deepest depth of the upper interval. 3 Devices run on electrical resistivity tool. 

4 Devices run on dual-induction and shallow resistivity tool. 

CAL(-6)1

GR (spliced)2

GAMM

RIL

Sonic DT

XCAL, YCAL 

Caliper

Gamma ray

Gamma ray

Resistivity from slim hole induction tool 

(40 centimeter radius of investigation)

Sonic interval transit time or 

delta t (compensated)

X-caliper and Y-caliper

(both on same tool and 90 degrees apart)

in.

GAPI

cps

ohm-m

μsec/ft

in. 

Inch

American Petroleum Institute

Standard Units

Counts per second

Ohm-meter

Microseconds per foot

Inch 

DPHI Density porosity percent Porosity as a percent

Resistivity long normal 

(AM electode spacing = 64 inches) RLN3 ohm-m Ohm-meter

Ohm-meter

Ohm-meter

Ohm-meter

Ohm-meter

ohm-m

ohm-m

ohm-m

ohm-m

Resistivity short normal 

(AM electode spacing = 16 inches) RSN3

RILD4 Resistivity induction deep 

(Deep radius of investigation)

RILM4 Resistivity induction medium 

(Medium radius of investigation)

RLL34 Resistivity laterolog 3 

(Shallow focused resistivity)

Rudstone

Core samples 

 described in this study

 by R.S. Reese, K.J. Cunningham, 

 or C.M. Wright–shown in depth 

 track of well

Claystone

Avon Park Formation

Lower Arcadia Formation

Arcadia Formation

Arcadia sequences 1 and 2 

Upper middle Avon Park Formation

Lower Avon Park Formation

Altitude of land surface, in 

 feet above National Geodetic 

 Vertical Datum of 1929 (NGVD 29). 

Lower middle Avon Park Formation

LANDMSL

Avon Park sequence 1–

 ? Indicates depth is less 

 certain because well does 

 not have borehole geophysical 

 image log data

?

Salinity boundary

Base of brackish groundwater

Drilled-cuttings samples 

 described in this study

 by R.S. Reese–shown in 

 depth track of well

No data or lithologic

 description not used

Open hole interval over which no flow zones 

were identified

Flow zone interpretated from borehole flowmeter 

 and fluid properties geophysical data

Interval not evaluated for flow

Deeper interval not evaluated for flow

Open hole 

 interval over 

 which flow 

 was evalulated Open hole interval over which no flow zones 

were identified

Flow zones evaluated in open hole intervals 

using borehole flowmeter and fluid properties 

geophysical data and shown in the 

flow zones column

Base of brackish groundwater 

?

Peace River

Formation

(?- upper boundary not determined)

Upper Arcadia 

Formation

Avon Park

sequence 2, (AP2)

Avon Park

sequence 1, 

(AP1)

Upper-middle Avon Park

Formation

Lower Arcadia

Formation

Upper Avon Park

Formation

Lower Floridan aquifer

uppermost major permeable zone

Avon Park 

permeable zone

Upper

Floridan

 aquifer

Surficial 

aquifer

system

Intermediate 

confining unit

Middle 

semiconfining unit 1

Middle 

semiconfining unit 2

Lower Floridan 

confining unit 

?-base unknown

Lower-middle Avon Park

Formation

Lower Avon Park

Formation

Arcadia sequences 3 and 4, 

(AR3, AR4)

Arcadia sequences 1 and 2, 

(AR1, AR2) ? ?

4.9 miles

Tie well with 

section Z-Z'

5.6 miles 1.0 mile 1.78 miles

 A'

EAST AWEST 

Land surface

Datum

NGVD 29

–1,600

–1,200

–1,800

–2,000

–100

–200

–300

–400

–500

–700

–800

–900

–1,000

–1,100

–1,300

–1,400

–1,500

–1,700

–1,900

–2,100

–2,200

–2,400

–2,300

Altitude, in feet below NGVD 29

–600

Land surface

Datum

NGVD 29

–1,600

–1,200

–1,800

-2,000

–100

–200

–300

–400

–500

–700

–800

–900

–1,000

–1,100

–1,300

–1,400

–1,500

-1,700

-1,900

-2,100 Altitude, in feet below NGVD 29

–600

–1,600

–1,800

–2,000

–1,300

–1,400

–1,500

–1,700

–1,900

–2,100

–2,200

–2,400

–2,300

PALM BEACH

BROWARD

BROWARD

MIAMI-DADE

A

TLANTIC OCEAN

Sawgrass Expressway

Florida's Turnpike

0 2.5 5 MILES

0 2.5 5 KILOMETERS

80°20' 80°10'

26°20'

26°10'

26°00'

A'

C'

Z'

A

Z

C

G-2973

G-2968

SUN-I3

G-2916

G-2938

BCN-I1

PB-1775

PB-1766

G-2981

PLT-ROI1

G-2971

G-2984

G-2986

G-2985

NORTH NEW 

RIVER CANAL

G-2970

G-2961

EXPLANATION

A A' Stratigraphic and hydrogeologic section line -- this plate

G-2984 Well and number

FTL-I4

75

95

595

1 441

1

C C' Stratigraphic and hydrogeologic section line -- other plates

G-2916 (site 2) 

LANDMSL: 17 feet

GR (spliced), in GAPI

0 200

CAL (spliced), in inches

0 20

RSN (spliced), in ohm-m

0 100

RLN (spliced). in ohm-m

0 100

Flow zone

Hydrogeologic unit

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

Lithologic description not used Lithology

Depth, in feet below 

land surface

G-2968 (site 8) 

LANDMSL: 12.5 feet

GR, in GAPI

0 100

XCAL shallow, in inches

45 75

YCAL shallow, in inches

45 75

XCAL deep, in inches

0 20 YCAL deep, in inches

0 20 180 120 80

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

1,400

1,500

1,600

1,700

1,800

1,900

2,000

2,100

2,200

2,300

Lithologic description for interval from 800 to 1,300 feet below land 

surface is from this study; remainder is from Camp, Dresser, and McKee, Inc. (2008) Lithologic description not used Lithology

Hydrogeologic unit

Sonic DT, μsec/ft

Depth, in feet below 

land surface

Flow zone

Upper boundary for Avon Park sequence 1 from sonic geophysical data 

collected in well G-2969 at the same site

G-2984 (W-19318; test corehole; site 18)

GAMM-4, in cps

0 400

CAL-1, in inches

0 10

CAL-2, in inches

0 10

GAMM-6, in cps

0 400

CAL-6, in inches

0 10

CAL-7, in inches

0 10

RIL-3 shallow, in ohm-m

0 60 RIL-6 deep, in ohm-m

0 30

Sonic DT-6, μsec/ft

170 70 Sonic DT-7, μsec/ft

220 120

Sonic DT-3, μsec/ft

220 120

Hydrogeologic unit

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

LANDMSL: 13 feet

Depth, in feet below 

land surface

Flow zone

backup curve

scale of 270 to 170

μsec/ft

Lithology

Lithologic description from this study.

120 for DT-6

PB-1775 (site 16) 

LANDMSL: 16.3 feet

XCAL (spliced), in inches

0 20

YCAL (spliced), in inches

0 20

GR (spliced), in GAPI

0 150

Sonic DT, in μsec/ft

160 120 60

Lithology

Flow zone

Hydrogeologic unit

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

1,400

1,500

1,600

Lithologic description not used

Lithologic description from Palm Beach County Water Utilities Department (2003) Depth, in feet

below land suface

PB-1766 (W-17986; PBF-I2; site 17)

LANDMSL: 12.05 feet 

XCAL, in inches

0 20

YCAL, in inches

0 20

GR (spliced), in GAPI

0 150

CAL deep, in inches

0 20

Lithology

Sonic DT, in μsec/ft

160 120 60

DPHI, in percent

70 0

Flow zone

0

100

200

300

400

500

600

700

800

900

1,000

1,100

1,200

1,300

1,400

1,500

1,600

1,700

1,800

1,900

2,000

2,100

2,200

2,300

Hydrogeologic unit

Depth, in feet

below land suface

Lithologic description from Florida Geological Survey for W-17986 at URL

http://www.dep.state.fl.us/geology/gisdatamaps/litholog-temp.htm

Upper boundary for Avon Park sequence 1 from formation microresistivity image data collected in well PB-1841 at the same site

Prepared in cooperation with 

Broward County

U.S. Department of the Interior

U.S. Geological Survey

OPEN-FILE REPORT 2013–1141

Statrigraphic and hydrogeologic section A–A' —Plate 1

Preliminary stratigraphic and hydrogeologic cross sections and seismic profile of the Floridan aquifer system of Broward County, Florida

 By Ronald S. Reese and Kevin J. Cunningham

By 

Ronald S. Reese and Kevin J. Cunningham

2013

Preliminary Stratigraphic and Hydrogeologic Cross Sections and Seismic Profile of the 

Floridan Aquifer System of Broward County, Florida