hydrogeology, hydrologic budget, and water chemistry of ... · td-68-33-501 b' td -68 3 102...

0 1 2 3 4 MILES

Scale 1: 75,000

Rocky�

Creek

Creek

Bruins

Main Quihi Creek

Bul

lC

reek

SecondC

reekS

tate

State 16

173

English Crossing Road

Wharton

Stat

e 17

3

Dock

Park

37FM

1283

Sta

te 1

73

Cou

nty

Road251

Cou

nty

Roa

d

County

Road

252

Cou

nty

Roa

d 25

2

FM 2676

265

Road

Cou

nty

FM 2676

County R

oad

271

County R

oad2615

FM 1

283

Road

FM

1283

State 16

State 46

UD

UD

UD

UD

UD

Medina Lake fault

Diversion Lake fault

Haby Crossing fault

Boehme's Cave

Haby Bat Cave

BanderaPipe Creek

Riomedina

TD-68-33-501

B'

TD-68-33-102

ATD-68-25-703

TD-68-25-810

TD-68-25-904

TD-68-33-304A'

2F-4

B

BANDERA C

OUN

TY

MEDIN

A CO

UNTY

MEDINA

RIVER

MED

INA

R IVER

Red

Bluff

Creek

Pip

e

Creek

Cypress

Creek

MED

INA

LAK

E

MEDIN

ALA

KE

Elm

Cre

ek

MEDINA

R IVER

Med

ina

irriga tion

cana

l

Koenig Creek

DIVERSION LAKE

98o52'30"

29o45'

29o42'30"

98o55'98o57'30"99o99o02'30"

29o42'30"

29o45'

29o37'30"

29o40'

29o37'30"

29o40'

29o32'30"

29o35'99o05'

29o32'30"

29o35'

29o27'30"

29o30'

29o25'

99o05'

29o27'30"

29o30'

98o52'30"29o25'

98o55'98o57'30"99o99o02'30"

WATER-RESOURCES INVESTIGATIONS REPORT 00–4148Hydrogeologic sections and subdivisions—PLATE 1

Lambert, R.B., Grimm, K.C., and Lee, R.W., 2000, Hydrogeology, hydrologic budget, and water chemistry of the Medina Lake area, Texas

IN COOPERATION WITH THEBEXAR-MEDINA-ATASCOSA COUNTIES WATER CONTROL AND IMPROVEMENT DISTRICT NO. 1,

BEXAR METROPOLITAN WATER DISTRICT, TEXAS WATER DEVELOPMENT BOARD,�AND

EDWARDS AQUIFER AUTHORITY

U.S. DEPARTMENT OF THE INTERIORU.S. GEOLOGICAL SURVEY

MAP SHOWING HYDROGEOLOGIC SECTIONS A-A' AND B-B' AND SHOWING SUBDIVISIONSOF THE EDWARDS AND TRINITY AQUIFERS, MEDINA LAKE AREA, TEXAS

ByRebecca B. Lambert, Kenneth C. Grimm, and Roger W. Lee

2000

UD

251

Sta

te

Verde Creekfault

Parker

Creekfault

Vandenburg

School

fault

Seco Creekfault

Lincoln fault

MEDINA DAM

DIVERSION DAM

FM

471

Sta

te 4

6

U

D

HYDROGEOLOGIC SUBDIVISIONS I–VIII— Modified from Maclay and Small (1976)

PRIMARY FAULT—U, upthrown; D, downthrownINFERRED FAULT

STRIKE AND DIP

TRACE OF SECTION

SPRING

CAVE

WELL WITH STATE WELL NUMBERTD-68-25-703

A A'

SURFICIAL DEPOSITS AND UPPER CONFINING UNIT (ESCONDIDO FORMATION, ANACACHO LIMESTONE, AND AUSTIN GROUP), UNDIVIDED

III LEACHED AND COLLAPSED MEMBERS, UNDIVIDED

IV REGIONAL DENSE MEMBER

V GRAINSTONE MEMBER

VI KIRSCHBERG EVAPORITE MEMBER

VII DOLOMITIC MEMBER

VIII BASAL NODULAR MEMBER

UPPER MEMBER OF THE GLEN ROSELIMESTONE

LOWER MEMBER OF THE GLEN ROSELIMESTONE

DE

VIL

S R

IVE

R F

OR

MAT

ION

PE

RS

ON

FO

RM

ATIO

N

ED

WA

RD

S G

RO

UP

KA

INE

R F

OR

MAT

ION

UP

PE

R C

ON

FIN

ING

UN

IT

EDWARDSAQUIFER

TRINITYAQUIFER

EXPLANATION

I GEORGETOWN FORMATION

II CYCLIC AND MARINE MEMBERS, UNDIVIDED (NOT EXPOSED IN STUDY AREA)

FACIES CHANGE

DEL RIO CLAY

BUDA LIMESTONE

EAGLE FORD GROUP

AUSTIN GROUP

NOTE: Geology modified from Small and Clark (2000) on the basis of additional fieldwork in Medina County

A

A'

0 1 2 MILES

Leached and collapsed members, undivided

Leached and collapsed members, undivided

Regional dense member

Regional dense member

County Road 271

TD-68-

25-7

03

TD-68-

25-8

10

Leached and collapsed members, undivided

Regional dense member

Divers

ion L

ake

fault

TD-68-

25-9

04

TD-68-

33-3

04

Haby C

ross

ing

fau

lt

Kirschberg evaporite member

County Road 2615

County Road 2615

Med

ina i

rrig

atio

n can

al

Med

ina R

iver

Grainstone memberKirschberg evaporite member

Upper

Basal nodular member

Dolomitic member

Grainstone member

Kirschberg evaporite member

Dolomitic member

Basal nodular member

Limestone

Surficial deposits and

upper confining unit(Escondido Formation,

Anacacho Limestone, and

Austin Group), undividedEagle Ford GroupBuda LimestoneDel Rio Clay

Cyclic and marinemembers, undivided

Gamma ray

Well with identification number

FAULT—Arrow shows direction of movement. Dashed where inferred

1,300

1,200

1,100

1,000

900

800

700

600

500

ALT

ITU

DE

, IN

FE

ET

VERTICAL SCALE GREATLY EXAGGERATED

Generalized hydrogeologic section A–A' of the Edwards aquifer, Medina Lake area, TexasDatum is sea level

Leached and collapsed members, undivided

Glen Rose

Georgetown Formation

0 1 2 MILES

B

B'

BANDERA COUNTY

MEDIN

A COUNTY

Basal nodular member

Med

ina L

ake

fault

Medina Lake

Kirschberg evaporite member Cor

ps o

f Eng

ineer

s

core

hole

2F-4

County Road 271

County Road 2615

Leached and collapsed members, undivided Leached and

collapsed members, undivided

Leached and collapsed members, undivided

Regional dense member

TD-68-

25-8

10

Count

y Roa

d 27

1

Divers

ion L

ake

fault

TD-68-

33-1

02

TD-68-

33-5

01

Haby C

ross

ing fa

ult

FM 2676

Dolomitic

BasalGlen Rose

Resistivity

Well with identification number

Gamma ray

GrainstoneKirschberg

nodular

member

Limestone,Devils River Formation

Gamma ray

Basal nodular member

Surfical deposits andupper confining unit�(Escondido Formation,Anacacho Limestone, andAustin Group), undivided

Spontaneous potential

Eagle Ford GroupBuda Limestone

Del Rio Clay

Georgetown Formation Devils River Formation

Resistivity

1,400

1,200

1,000

800

600

400

200

SEALEVEL

-200

-400

FAULT—Arrow shows direction of movement. Dashed where inferred

VERTICAL SCALE GREATLY EXAGGERATED

Generalized hydrogeologic section B–B' of the Edwards aquifer, Medina Lake area, Texas

ALT

ITU

DE

, IN

FE

ET

Datum is sea level

member

memberUpper

evaporite

member

Regional dense member

KINNEY COUNTY

UVALDE COUNTY

BANDERA COUNTY

MEDINA COUNTY

HAYS COUNTY

COMAL COUNTY

COUNTY

BEXAR

San Antonio

Study area

TEXAS

Study area

LOCATION MAP