1
0 1 2 3 4 MILES Scale 1: 75,000 Rocky Creek Creek Bruins Main Quihi Creek Bull Creek Second Creek State State 16 173 English Crossing Road Wharton State 173 Dock Park 37 FM 1283 State 173 County Road 251 County Road County Road 252 County Road 252 FM 2676 265 Road County FM 2676 County Road 271 County Road 2615 FM 1283 Road FM 1283 State 16 State 46 U D U D U D U D U D Medina Lake fault Diversion Lake fault Haby Crossing fault Boehme's Cave Haby Bat Cave Bandera Pipe Creek Riomedina TD-68-33-501 B' TD-68-33-102 A TD-68-25-703 TD-68-25-810 TD-68-25-904 TD-68-33-304 A' 2F-4 B BANDERA COUNTY MEDINA COUNTY ME D I N A R I V ER M ED I NA R I V E R R e d Bluff Cr eek Pipe C re ek Cypress C re e k M E D I N A LA K E M E D I N A L A K E E l m C re e k ME D INA R IV ER M ed i na i r ri g a t i o n canal K o en ig C r e e k DIVERSION LAKE 98 o 52'30" 29 o 45' 29 o 42'30" 98 o 55' 98 o 57'30" 99 o 99 o 02'30" 29 o 42'30" 29 o 45' 29 o 37'30" 29 o 40' 29 o 37'30" 29 o 40' 29 o 32'30" 29 o 35' 99 o 05' 29 o 32'30" 29 o 35' 29 o 27'30" 29 o 30' 29 o 25' 99 o 05' 29 o 27'30" 29 o 30' 98 o 52'30" 29 o 25' 98 o 55' 98 o 57'30" 99 o 99 o 02'30" WATER-RESOURCES INVESTIGATIONS REPORT 00–4148 Hydrogeologic 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 THE BEXAR-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 INTERIOR U.S. GEOLOGICAL SURVEY MAP SHOWING HYDROGEOLOGIC SECTIONS A-A' AND B-B' AND SHOWING SUBDIVISIONS OF THE EDWARDS AND TRINITY AQUIFERS, MEDINA LAKE AREA, TEXAS By Rebecca B. Lambert, Kenneth C. Grimm, and Roger W. Lee 2000 U D 251 State Verde Creek fault Parker Creek fault Vandenburg School fault Seco Creek fault Lincoln fault MEDINA DAM DIVERSION DAM FM 471 State 46 U D HYDROGEOLOGIC SUBDIVISIONS I–VIII— Modified from Maclay and Small (1976) PRIMARY FAULT—U, upthrown; D, downthrown INFERRED FAULT STRIKE AND DIP TRACE OF SECTION SPRING CAVE WELL WITH STATE WELL NUMBER TD-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 ROSE LIMESTONE LOWER MEMBER OF THE GLEN ROSE LIMESTONE DEVILS RIVER FORMATION PERSON FORMATION EDWARDS GROUP KAINER FORMATION UPPER CONFINING UNIT EDWARDS AQUIFER TRINITY AQUIFER 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-68-25-703 TD-68-25-810 Leached and collapsed members, undivided Regional dense member Diversion Lake fault TD-68-25-904 TD-68-33-304 Haby Crossing fault Kirschberg evaporite member County Road 2615 County Road 2615 Medina irrigation canal Medina River Grainstone member Kirschberg 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), undivided Eagle Ford Group Buda Limestone Del Rio Clay Cyclic and marine members, 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 ALTITUDE, IN FEET VERTICAL SCALE GREATLY EXAGGERATED Generalized hydrogeologic section A–A' of the Edwards aquifer, Medina Lake area, Texas Datum is sea level Leached and collapsed members, undivided Glen Rose Georgetown Formation 0 1 2 MILES B B' BANDERA COUNTY MEDINA COUNTY Basal nodular member Medina Lake fault Medina Lake Kirschberg evaporite member Corps of Engineers 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-68-25-810 County Road 271 Diversion Lake fault TD-68-33-102 TD-68-33-501 Haby Crossing fault FM 2676 Dolomitic Basal Glen Rose Resistivity Well with identification number Gamma ray Grainstone Kirschberg nodular member Limestone, Devils River Formation Gamma ray Basal nodular member Surfical deposits and upper confining unit (Escondido Formation, Anacacho Limestone, and Austin Group), undivided Spontaneous potential Eagle Ford Group Buda Limestone Del Rio Clay Georgetown Formation Devils River Formation Resistivity 1,400 1,200 1,000 800 600 400 200 SEA LEVEL -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 ALTITUDE, IN FEET Datum is sea level member member Upper 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
