DOCSLIB.ORG

SPRING 1982 Bulletin No. 40 LINDA

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
SPRING 1982 Bulletin No. 40 LINDA BAYLOR Univ. of Texas at 76019US A SPRING 1982 Bulletin No. 40 Stratigraphy of the Fredericksburg Group North of the Colorado River, Texas LINDA thinking is more important than elaborate FRANK PH.D. PROFESSOR OF GEOLOGY BAYLOR UNIVERSITY 1929-1934 Objectives of Geological Training at Baylor The training of a geologist in a university covers but a few years; his education continues throughout his active life. The purposes of train­ ing geologists at Baylor University are to provide a sound basis of understanding and to foster a truly geological point of view, both of which are essential for continued professional growth. The staff considers geology to be unique among sciences since it is primarily a field science. All geologic research in­ cluding that done in laboratories must be firmly supported by field observations. The student is encouraged to develop an inquiring ob­ jective attitude and to examine critically all geological concepts and principles. The development of a mature and professional attitude toward geology and geological research is a principal concern of the department. THE BAYLOR UNIVERSITY PRESS WACO, TEXAS BAYLOR GEOLOGICAL STUDIES BULLETIN NO. 40 Stratigraphy of the Fredericksburg Group North of the Colorado River Texas Linda Whigham Corwin BAYLOR UNIVERSITY Department of Geology Waco, Texas Spring, Baylor Geological Studies EDITORIAL STAFF Jean M. Spencer Jenness, M.S., Editor environmental and medical geology O. T. Hayward, Ph.D., Advisor, Cartographic Editor what have you Peter M. Allen, Ph.D. urban and environmental geology, hydrology Harold H. Beaver, Ph.D. stratigraphy, petroleum geology Rena Bonem, Ph.D. paleontology, paleoecology Robert C. Grayson, Ph.D. stratigraphy, conodont biostratigraphy and sedimentary petrology Don M. Greene, Ph.D. physical geography, climatology, earth sciences Don F. Parker, Ph.D. igneous geology, volcanology, mineralogy, petrology STUDENT EDITORIAL STAFF Diane Mueck, Cartographer The Baylor Geological Studies Bulletin is published Spring and Fall, by the Department of Geology at Baylor University. The Bulletin is specifically dedicated to the dissemination of geologic knowledge for the benefit of the people of Texas. The publication is designed to present the results of both pure and applied research which will ultimately be important in the eco­ nomic and cultural growth of the State. ISSN 0005-7266 Additional copies of this bulletin can be obtained from the Department of Geology, Baylor University, Waco, Texas 76798. postpaid. CONTENTS Page Abstract Introduction Purpose Location Method Previous works Acknowledgments 14 Regional Geology Structure 14 Stratigraphy Stratigraphy Area One Area Two 20 Area Three 22 Area Four 24 Area Five 26 Area Six 29 Area Seven 39 Depositional History 43 Early Paluxy time 43 Middle Paluxy time 43 Late Paluxy time 44 Early Walnut time 44 Middle Walnut time 46 Late Walnut-Early Comanche Peak time 47 Late Comanche Peak time 47 Early Edwards time 49 Middle Edwards time 50 Late Edwards time Post Edwards time 52 Summary and Conclusions 52 Appendix I 55 Appendix II 58 References Index 63 ILLUSTRATIONS FIGURE 1. Geologic and locality map, western section 7 2. Geologic and locality map, eastern section 8 3. Index map of area of investigation 9 4. Structural and depositional features, Texas craton and East Texas basin 5. Regional outcrop of Fredericksburg Group of Texas 9 6. Stratigraphic nomenclature and relationships of Fredericksburg Group in Texas 7. North-south geologic cross sections 18 8. East-west geologic cross sections 19 9. Stratigraphic areas within the Fredericksburg Group 20 10. Locality 4. Contact between Edwards and Comanche Peak Formations 20 Locality 6. Contact between Edwards and Comanche Peak Formations 21 Locality 6. Edwards Formation of Area One 13. Locality 5. Rudist mound in the Edwards Formation 22 14. Locality 5. Rudist mound with flank beds in the Edwards Formation 22 15. Locality 10. Close view of bored surface 22 16. Locality 10. Large-scale festoon cross-bedding 23 Locality 9. Contact between Edwards and Comanche Peak Formations 23 Locality 29. Complete section of Fredericksburg rock, Santa Anna Mountain 24 19. Locality 14. Typical rudist-mound sequence 25 20. Locality 14. Basal unit of rudist-mound sequence, Edwards Formation 26 21. Locality 17. Dolomite facies, Edwards Formation 26 22. Locality 17. Laminated dolomite facies, Edwards Formation 27 23. Locality 56. Lake Merritt Member, Paluxy Formation 27 24. Locality 54. Planar Eagle Mountain Member, Paluxy Formation 28 25. 55. Channel deposits, Eagle Mountain Member, Paluxy Formation 28 26. Locality 63. Mary's Creek Member, Goodland Formation 28 27. Locality 62. Benbrook Member, Goodland Formation 29 28. Locality 45. Lake Merritt Member, Paluxy Formation 30 29. Locality 72. Ledge in the Lake Merritt Member, Paluxy Formation 30 30. Locality 34. Georges Creek Member, Paluxy Formation 30 31. Locality 48. Channel, Eagle Mountain Member, Paluxy Formation 32. Locality 75. Cross-bedded Eagle Mountain Member, Paluxy Formation 33. Locality 34. Contact between Paluxy and Walnut Formations 32 34. Locality 45. Oyster Cedar Park Member, Walnut Formation 33 35. Locality 64. Middle portion, Comanche Peak Formation 34 36. Locality 86. Upper portion, Comanche Peak Formation 34 37. Locality 30. Contact between Comanche Peak and Edwards Formations 35 38. Locality 33. Base of the Edwards Formation 35 39. Locality 67. Base of rudist-mound sequence 36 40. Locality 79. Rudist-mound sequence, Edwards Formation 36 41. Locality 33. Rudist-mound sequence 36 42. Isopach map, Paluxy Formation 37 43. Isopach map, Walnut Formation 38 44. Isopach map, Comanche Peak Formation 39 45. Isopach map, Edwards Formation 40 46. Isopach map, Kiamichi Formation 47. Isopach map, Fredericksburg Group 42 48. Early Paluxy paleogeologic map 44 49. Middle Paluxy paleogeologic map 45 50. Late Paluxy paleogeologic map 45 51. Early Walnut paleogeologic map 46 52. Middle Walnut paleogeologic map 47 53. Late Walnut-Early Comanche Peak paleogeologic map 48 54. Late Comanche Peak paleogeologic map 48 55. Edwards paleogeologic map 49 56. Middle Edwards depositional environments 50 57. Kiamichi paleogeologic map Stratigraphy of the Fredericksburg Group North of the Colorado River, Texas Linda Whigham Corwin ABSTRACT The Fredericksburg Group north of the Colorado Texas craton as the Glen Rose sea regressed into the East River consists of a basal quartz sand (the Paluxy and the Texas basin. The basal Paluxy sands represent strandline upper Antlers sands) and an overlying carbonate sequence and nearshore deposits of the regressing sea. With con­ (the Walnut Clay, the Comanche Peak Limestone, and tinued regression, braided streams deposited sands of the the Edwards Limestone). These deposits represent a clas­ middle Paluxy Formation and, with further regression, sical transgressive sequence and constitute a section of the central portion of the study area was left as a marginal marine deposits that has been preserved with­ broad, low subaerial plain upon which a prominent soil out significant alteration since deposition. horizon developed. After the regression of the Coman­ The Fredericksburg Group within the area of investi­ chean sea during the early and middle parts of Paluxy gation was deposited in two major structural provinces: deposition, the sea transgressed to the northwest and the the western margin of the East Texas basin, a subsiding fluvial and nearshore deposits of the upper Paluxy For­ trough that does not appear to have been a significant mation were laid down. control on the upper Fredericksburg sedimentation, and Northwestward transgression by the Comanchean sea the Texas craton, a stable platform with several struc­ continued across a broad, flat platform throughout tural features that exhibited pronounced effects of the deposition of the Walnut Formation. The basal Walnut deposition of the Fredericksburg strata. The Concho units were deposited by an initially slow, then rapid arch, a broad Paleozoic structural high, represented one transgression of the sea and represent nearshore deposits. of the shallowest areas on the craton during Early Cre­ The middle units of the Walnut Formation were depos­ taceous time and is reflected in the Fredericksburg sedi­ ited in low energy, shallow marine conditions with the ments by a thinning in the basal over the arch and later development of a large shallow bay in much of the the loss of distinctive facies in the overlying limestones. eastern area. In the central and western portions of the The Llano uplift, an inlier of Precambrian granite and study area, of the deposits is indicated as the mid­ metamorphic rock, represented a structurally and topo­ dle Walnut seas transgressed to the northwest. The upper graphically positive area during much of Early Creta­ Walnut sediments were deposited by the transgressing ceous time, influenced the development of carbonate Comanchean sea in a normal marine environment in ramps and platforms to the east of the uplift, and is which water depth increased and turbulence decreased reflected by the loss of distinctive facies in the limestones from the previous depositional environments of the Wal­ to the northwest of the uplift. nut Formation. The Fredericksburg Group within the area of investi­ Deposition of the Comanche Peak Formation resulted gation can be divided into seven stratigraphically distinct from the continued northwestward transgression of the One through Area Seven. It is necessary to Comanchean sea. Environmental conditions
Load more

Recommended publications
  • L ANDERSON Thinking Is More Important Than Elaborate
    Stratigraphy of the Fredericksburg Group, East Texas Basin L ANDERSON thinking is more important than elaborate FRANK PH.D. PROFESSOR OF GEOLOGY BAYLOR UNIVERSITY 1929-1934 Objectives of Geological Training at Baylor The training of a geologist in a university covers but a few years; his education continues throughout his active life. The purposes of train­ ing geologists at Baylor University are to provide a sound basis of understanding and to foster a truly geological point of view, both of which are essential for continued professional growth. The staff considers geology to be unique among sciences since it is primarily a field science. All geologic research in­ cluding that done in laboratories must be firmly supported by field observations. The student is encouraged to develop an inquiring ob­ jective attitude and to examine critically all geological and principles. The development of a mature and professional attitude toward geology and geological research is a principal concern of the department. Cover: Isopach of the Fredericksburg Group. THE BAYLOR PRINTING SERVICE WACO, TEXAS BAYLOR GEOLOGICAL STUDIES BULLETIN NO. 47 Stratigraphy of the Fredericksburg Group, East Texas Basin L. Marlow Anderson BAYLOR UNIVERSITY Department of Geology Waco, Texas Spring 1989 Baylor Geological Studies EDITORIAL STAFF Janet L. Burton, Editor O. T. Hayward, Ph.D., Advisor, Cartographic Editor general and urban geology and what have you Joe C. Yelderman, Jr., Ph.D., Associate Editor hydrogeology Peter M. Allen, Ph.D. urban and environmental geology, hydrology Harold H. Beaver, Ph.D. stratigraphy, petroleum geology Rena Bonem, Ph.D. paleontology, paleoecology Brown, Ph.D. structural tectonics S.
    [Show full text]
  • Carbonate Geology and Hydrology of the Edwards Aquifer in the San
    Report 296 Carbonate Gec>logy and Hydrology ()f the Edwards Aquifer in the San Antonio Ar~ea, Texas November 1986 TEXAS WATER DEVELOPMENT BOARD REPORT 296 CARBONATE GEOLOGY AND HYDROLOGY OF THE EDWARDS AQUIFER IN THE SAN ANTONIO AREA, TEXAS By R. W. Maclay and T. A. Small U.S. Geological Survey This report was prepared by the U.S. Geological Survey under cooperative agreement with the San Antonio City Water Board and the Texas Water Development Board November 1986 TEXAS WATER DEVELOPMENT BOARD Charles E. Nemir. Executive Administrator Thomas M. Dunning, Chairman Stuart S. Coleman. Vice Chairman Glen E. Roney George W. McCleskey Charles W. Jenness Louie Welch A uthorization for use or reproduction ofany originalmaterial containedin this publication. i.e., not obtained from other sources. is freely granted. The Board would appreciate acknowledgement. Published and distributed by the Texas Water Development Board Post Office Box 13231 Austin. Texas 78711 ii ABSTRACT Regional differences in the porosity and permeability of the Edwards aquifer are related to three major depositional areas, the Maverick basin, the Devils River trend, and the San Marcos platform, that existed during Early Cretaceous time. The rocks of the Maverick basin are predominantly deep basinal deposits of dense, homogeneous mudstones of low primary porosity. Permeability is principally associated with cavernous voids in the upper part of the Salmon Peak Formation in the Maverick basin. The rocks of the Devils River trend are a complex of marine and supratidal deposits in the lower part and reefal or inter-reefal deposits in the upper part. Permeable zones, which occur in the upper part ofthe trend, are associated with collapse breccias and rudist reefs.
    [Show full text]
  • Report 360 Aquifers of the Edwards Plateau Chapter 2
    Chapter 2 Conceptual Model for the Edwards–Trinity (Plateau) Aquifer System, Texas Roberto Anaya1 Introduction The passage of Senate Bill 1 in 1997 established a renewed public interest in the State’s water resources not experienced since the drought of the 1950s. Senate Bill 1 of 1999 and Senate Bill 2 of 2001 provided state funding to initiate the development of groundwater availability models for all of the major and minor aquifers of Texas. The development and management of Groundwater Availability Models (GAMs) has been tasked to the Texas Water Development Board (TWDB) to provide reliable and timely information on the State’s groundwater resources. TWDB staff is currently developing a GAM for the Edwards–Trinity (Plateau) aquifer. An essential task in the design of a numerical groundwater flow model is the development of a conceptual model. The conceptual model is a generalized description of the aquifer system that defines boundaries, hydrogeologic parameters, and hydrologic stress variables. The conceptual model helps to compile and organize field data and to simplify the real-world aquifer flow system into a graphical or diagrammatical representation while retaining the complexity needed to adequately reproduce the system behavior (Anderson and Woessner, 1992). The first step in the development of a conceptual model is to delineate the study area and form an understanding of its physical landscape with regard to the physiography, climate, and geology. Another early step also involves the research and investigation of previous aquifer studies. Intermediate steps bring together all of the information for establishing the hydrogeologic setting which consists of the hydrostratigraphy, structural geometry, hydraulic properties, water levels and regional groundwater flow, recharge, interactions between surface water and groundwater, well discharge, and water quality.
    [Show full text]
  • USGS Water-Resources Investigations Report 03–4010
    - - - - - - Cover: Sabinal River, Uvalde County, looking south at the Devils River Formation/Glen Rose Limestone contact; hills are Devils River, exposed rock is Glen Rose. U.S. Department of the Interior U.S. Geological Survey Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer, Uvalde County, Texas By Allan K. Clark U.S. GEOLOGICAL SURVEY Water-Resources Investigations Report 03–4010 In cooperation with the Edwards Aquifer Authority Austin, Texas 2003 U.S. DEPARTMENT OF THE INTERIOR Gale A. Norton, Secretary U.S. GEOLOGICAL SURVEY Charles G. Groat, Director Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For additional information write to District Chief U.S. Geological Survey 8027 Exchange Dr. Austin, TX 78754–4733 E-mail: [email protected] Copies of this report can be purchased from U.S. Geological Survey Information Services Box 25286 Denver, CO 80225–0286 E-mail: [email protected] ii CONTENTS Abstract ................................................................................................................................................................................ 1 Introduction .......................................................................................................................................................................... 1 Methods of Investigation .......................................................................................................................................... 3 Previous
    [Show full text]
  • Geologic Framework and Hydrogeologic Characteristics of the Edwards Aquifer Outcrop, Comal County, Texas
    GEOLOGIC FRAMEWORK AND HYDROGEOLOGIC CHARACTERISTICS OF THE EDWARDS AQUIFER OUTCROP, COMAL COUNTY, TEXAS U.S. GEOLOGICAL SURVEY Prepared in cooperation with the EDWARDS UNDERGROUND WATER DISTRICT Cover photograph: One of the spring oritices at Coma! Springs discharging a combined flow of 336 cubic feet per second, March IYSl4. Photograph by Ted A. Small. GEOLOGIC FRAMEWORK AND HYDROGEOLOGIC CHARACTERISTICS OF THE EDWARDS AQUIFER OUTCROP, COMAL COUNTY, TEXAS By Ted A. Small and John A. Hanson U.S. GEOLOGICAL SURVEY Water-Resources Investigations 94-4117 Prepared in cooperation with the EDWARDS UNDERGROUND WATER DISTRICT Austin, Texas 1994 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director Any use of trade, product, or firm names is for descriptive purposes onfy and does not imply endorsement by the U.S. Government. For additional information write to: Copies of this report can be purchased from: U.S. Geological Survey Earth Science Information Center District Chief Open-File Reports Section U.S. Geological Survey Box 25286, Mail Stop 517 8011 Cameron Rd. Denver Federal Center Austin, TX 78754-3898 Denver, CO 80225-0046 II CONTENTS Abstract ................................................................................................................................................................................ 1 Introduction .. ... .. ....... ... .. ... .. ..... .. ... .. ................... ... ....... ......... ............ ........ .. .......... .. .......... .. ....... .......
    [Show full text]
  • Groundwater Technical Report for the Central Texas Regional Mobility Authority 183 North Mobility Project
    Groundwater Technical Report for the Central Texas Regional Mobility Authority 183 North Mobility Project CSJ # 0151-05-100 and 3136-01-185 Prepared for CP&Y, Inc. Prepared by Cambrian Environmental with SWCA Environmental Consultants July 2, 2015 SWCA Project Number 25572-AUS This page left intentionally blank ES-1 Groundwater Technical Report for the Central Texas Regional Mobility Authority 183 North Mobility Project CAMBRIAN ENVIRONMENTAL 4422 Pack Saddle Pass No. 204 Austin, Texas 78745 with SWCA ENVIRONMENTAL CONSULTANTS 4407 Monterey Oaks Blvd No. 110 Austin, Texas 78749 Submitted to: CP&Y, Inc. The Chase Bank Building Tower of the Hills 13809 Research Blvd, No. 300 Austin, Texas 78750 Attn: Andy Atlas July 2, 2015 Geological analysis and interpretations conducted by and under the direct supervision of Kemble White Ph.D., P.G., Texas Professional Geoscientist license number 3863. As a licensed professional geoscientist I attest that the contents of this report are complete and accurate to the best of my knowledge. ES-2 This page left intentionally blank ES-3 EXECUTIVE SUMMARY The proposed 183 North Mobility Project (Project) is a cooperative effort by the Central Texas Regional Mobility Authority (CTRMA) and the Texas Department of Transportation (TxDOT) to improve US 183 from State Highway (SH) 45/Ranch-to-Market Road (RM) 620 to Loop 1 (MoPac) (CSJ 0151-05-100 and 3136-01-185).Proposed Project activities involve a total of approximately 724.6 acres; 714.2 acres of existing right-of-way (ROW), 8.0 acres of proposed ROW, and 2.4 acres of existing easements, as shown in Figure 1 (Project Area).
    [Show full text]
  • Geologic Framework and Hydrostratigraphy of the Edwards and Trinity Aquifers Within Hays County, Texas
    Prepared in cooperation with the Edwards Aquifer Authority Geologic Framework and Hydrostratigraphy of the Edwards and Trinity Aquifers Within Hays County, Texas Pamphlet to accompany Scientific Investigations Map 3418 U.S. Department of the Interior U.S. Geological Survey A B C Cover. A, Photograph showing the Blanco River Valley, looking north from Little Arkansas Road, Hays County, Texas (photograph by Allan K. Clark, U.S. Geological Survey, February 27, 2018). B, Photograph showing a low water crossing on the Blanco River, looking south from Little Arkansas Road, Hays County, Texas (photograph by Allan K. Clark, U.S. Geological Survey, February 27, 2018). C, Photograph showing swimming hole on Cypress Creek in Blue Hole Regional Park, Wimberley, Hays County, Texas (photograph by Allan K. Clark, U.S. Geological Survey, February 27, 2018). Geologic Framework and Hydrostratigraphy of the Edwards and Trinity Aquifers Within Hays County, Texas By Allan K. Clark, Diana E. Pedraza, and Robert R. Morris Prepared in cooperation with the Edwards Aquifer Authority Pamphlet to accompany Scientific Investigations Map 3418 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior RYAN K. ZINKE, Secretary U.S. Geological Survey James F. Reilly II, Director U.S. Geological Survey, Reston, Virginia: 2018 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit https://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit https://store.usgs.gov.
    [Show full text]
  • Bibliography of the Edwards Aquifer, Texas, Through 1993
    BIBLIOGRAPHY OF THE EDWARDS AQUIFER, TEXAS, THROUGH 1993 Compiled by Julie A. Menard U.S. GEOLOGICAL SURVEY Open-File Report 95-336 Prepared in support of a study by the CENTER FOR RESEARCH IN WATER RESOURCES, UNIVERSITY OF TEXAS AT AUSTIN Austin, Texas 1995 U.S. DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL SURVEY Gordon P. Eaton, Director Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. For additional information write to: Copies of this report can be purchased from: U.S. Geological Survey Earth Science Information Center District Chief Open-File Reports Section U.S. Geological Survey Box 25286, Mail Stop 517 8011 Cameron Rd. Denver Federal Center Austin, TX 78754-3898 Denver, CO 80225-0046 CONTENTS Abstract .................................................................................................................^^ 1 Introduction ....................................................................................................................^^ 1 Purpose and Scope .................................................................................................................................................... 1 Description of the Edwards Aquifer ......................................................................................................................... 1 Sources of Related Information ...............................................................................................................................
    [Show full text]
  • Geologic Assessment U.S
    Geologic Assessment U.S. Highway 290 (US 290) / State Highway (SH) 71 West from State Loop 1 (MoPac) to Ranch-to-Market (RM) 1826 and SH 71 to Silvermine Drive Travis County, Texas CSJ: 0113-08-060 and 0700-03-077 December 2016; Revised November 2017, August 2018 The environmental review, consultation, and other actions required by applicable Federal environmental laws for this project are being, or have been, carried-out by TxDOT pursuant to 23 U.S.C. 327 and a Memorandum of Understanding dated December 16, 2014, and executed by FHWA and TxDOT. Contributing Zone within the Transition Zone 4. Attachment A - Geologic Assessment Table. Completed Geologic Assessment Table (Form TCEQ-0585-Table) is attached. 5. Soil cover on the project site is summarized in the table below and uses the SCS Hydrologic Soil Groups* (Urban Hydrology for Small Watersheds, Technical Release No. 55, Appendix A, Soil Conservation Service, 1986). If there is more than one soil type on the project site, show each soil type on the site Geologic Map or a separate soils map. Table 1 - Soil Units, Infiltration Characteristics and Thickness * Soil Group Definitions (Abbreviated) A. Soils having a high infiltration rate when thoroughly wetted. Soil Name Group* Thickness(feet) B. Soils having a moderate See Attached infiltration rate when thoroughly Table 1 wetted. C. Soils having a slow infiltration rate when thoroughly wetted. D. Soils having a very slow infiltration rate when thoroughly wetted. 6. Attachment B – Stratigraphic Column. A stratigraphic column showing formations, members, and thicknesses is attached. The outcropping unit, if present, should be at the top of the stratigraphic column.
    [Show full text]
  • Geologic Assessment of Undiscovered Oil
    Geologic Assessment of Undiscovered Oil and Gas Resources—Lower Cretaceous Albian to Upper Cretaceous Cenomanian Carbonate Rocks of the Fredericksburg and Washita Groups, United States Gulf of Mexico Coastal Plain and State Waters Open-File Report 2016–1199 U.S. Department of the Interior U.S. Geological Survey Geologic Assessment of Undiscovered Oil and Gas Resources—Lower Cretaceous Albian to Upper Cretaceous Cenomanian Carbonate Rocks of the Fredericksburg and Washita Groups, United States Gulf of Mexico Coastal Plain and State Waters By Sharon M. Swanson, Catherine B. Enomoto, Kristin O. Dennen, Brett J. Valentine, and Steven M. Cahan Open-File Report 2016–1199 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior SALLY JEWELL, Secretary U.S. Geological Survey Suzette M. Kimball, Director U.S. Geological Survey, Reston, Virginia: 2017 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment—visit http://www.usgs.gov or call 1–888–ASK–USGS. For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod/. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Suggested citation: Swanson, S.M., Enomoto, C.B., Dennen, K.O., Valentine, B.J., and Cahan, S.M., 2017, Geologic assessment of undis- covered oil and gas resources—Lower Cretaceous Albian to Upper Cretaceous Cenomanian carbonate rocks of the Fredericksburg and Washita Groups, United States Gulf of Mexico Coastal Plain and State Waters: U.S.
    [Show full text]
  • Austin West, Travis County, Texas
    BUREAU OF ECONOMIC GEOLOGY THE UNIVERSITY OF TEXAS AT AUSTIN AUSTIN, TEXAS 78712 Peter T.Flawn,Director Geologic Quadrangle MapNo. 38: Austin West,Travis County, Texas By P.U.Rodda,L.E.Garner,andG.L.Dawe April 1970 THEUNIVERSITYOF TEXASAT AUSTIN TO ACCOMPANY MAP GEOLOGIC BUREAU OF ECONOMICGEOLOGY QUADRANGLE MAP NO.38 Geology of the Austin West Quadrangle, Travis County, Texas PETER U. RODDA 1970 Contents Page Abstract _ 2 Introduction 2 Setting .. 2 Previous work 2 Acknowledgments 2 Stratigraphy 3 Introduction 3 Cretaceous rocks 3 Glen Rose Formation 3 Member 1 3 Member 2 3 Member 3 3 Member 4 3 Member 5 3 Walnut Formation 3 Bull CreekMember 4 Bee Cave Member 4 EdwardsFormation 4 Member 1 - 4 Member 2 _ 4 Member 3 5 Member 4 5 Georgetown Formation 5 DelRio Clay - 5 Buda Formation 6 Eagle Ford Formation 6 Austin Group — 6 Atco Formation - 6 Vinson Formation 7 Quaternary rocks 7 ColoradoRiver terracedeposits 7 Tributary terrace deposits 7 Alluvium - _ 7 Structure - - 8 Faults 8 Joints - 8 Folds - 8 Engineering geology andlanduse 8 Rock and mineral resources 9 Construction materials 9 EdwardsFormation 9 Alluvial deposits 9 Ground water _ 10 References cited 10 Abstract The rocks exposed in the Austin West quadrangle are from northwest tosoutheast,andsix terracedeposits (Sand Cretaceous marine limestones and clays and Quaternary Beach, Riverview,First Street, Sixth Street, Capitol, and alluvial deposits. The Cretaceous rocks dip gentlyeastward Asylum) consisting mostly of sand and gravelparallel the and are broken by onelarge (Mount Bonnell) fault and river and occupy successively higher topographic posi- numerous small, northeast-trending faults comprising the tions; the deposits are more extensixe east of the Mount Balcones fault zone.
    [Show full text]
  • Ed\Vards/Glen Rose Hydrologic Coi\1I\1Unicati
    ·.;.·. l: ....l • .·:".. • : . • • • ·.1 ••• j\--:- 0. '•' ::·. ~: .-;-~· .. :·.:~· ·>; ~:;. EDWARDS UNDERGROUND WATER DISTRICT .. REPORT 95-03 ED\VARDS/GLEN ROSE HYDROLOGIC COI\1I\1UNICATI ON, SAN'ANTONIO REGION, TEXAS r r r r EDWARDS/GLEN ROSE HYDROLOGIC COMMUNICATION, SAN ANTONIO REGION, TEXAS r r r Prepared for r Edwards Underground Water District r San Antonio, Texas March 1995 r r r r LBG-GUYTON ASSOCIATES r Professional Ground-Water and Environmental Services 1101 S. Capital of Texas Highway, Suite B-220 r Austin, Texas 78746 r r r LBG-GUYTON ASSOCIATES rL PROFESSIONAL GROUND•WATER AND ENVIRONMENTAL SERVICES Wil.UAM F. GUYTON FRANK J. GETCHELL .. MERVIN L. KLUO 1101 S.CAPITALOFTEXASHIOHWAY JEFFREY B. LENNOX r CHARLES W. KREITl.ER SUITEB-220 W. JOHN SEIFERT. JR. AUSTIN, TX 78146-6437 DAVID A. WILEY s12·321·9640 TERRANCE P. BRENNAN .· R. 0. SLAYBACK DAVID M. SCHANJ"Z O.SIDNEYFOX W. THOMAS WEST r FRANK H. CRUM CARY 0. PIETERICK MICHAEL R. BURKE DAVID B. TERRY ROBERT LAMONICA March 21, 1995 WIU.IAM B. KLEMT THOMAS P. CUSACK r ~~ECKMAN JOHN M. BENVEONA J. KEVIN POWERS KENNETH D. VOOEL JOHN NASO, JR. Mr. Rick Illgner General Manager Edwards Underground Water District 1615 N. St. Mary's !1!111 San Antonio, Texas 78212 l Dear Mr. lUnger: r Transmitted herewith is our repon, "Edwards/Glen Rose Hydrologic Communi­ cation, San Antonio Region, Texas." This study was conducted and the repon prepared by Messrs. William G. Stein and William B. Klemt, with some assistance from others of r our firm. We have enjoyed working with the Edwards Underground Water District in making this study of the Edwards aquifer.
    [Show full text]