Metadata: Identification_Information: Citation: Citation_Information: Originator: Allan K. Clark Originator: Robert R. Morris Publication_Date: 2015 Title: Geologic and Hydrostratigraphic Map of the Anhalt, Fischer, and Spring Branch 7.5-Minute Quadrangles, Blanco, Comal, and Kendall Counties, Texas Geospatial_Data_Presentation_Form: esri geodatabase, map Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3333 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/3333/ Online_Linkage: http://dx.doi.org/10.3133/sim3333 Description: Abstract: This report describes the geology and hydrostratigraphy of the Edwards and Trinity Groups in the Anhalt, Fischer, and Spring Branch 7.5-minute quadrangles, Blanco, Comal, and Kendall Counties, Texas. The hydrostratigraphy was defined based on variations in the amount and type of porosity of each lithostratigraphic unit, which varies depending on the unit's original depositional environment, lithology, structural history and diagenesis. Rocks exposed in the study area are of the Lower Cretaceous Trinity Group and lower part of the Kainer Formation of the Lower Cretaceous Edwards Group. The mapped outcrops in the study area are the Pearsall Formation and Glen Rose Limestone of the Trinity Group. The Pearsall Formation consists of, in ascending order: the Hammett Shale, Cow Creek Limestone, and Hensell Sand Members. The Glen Rose Limestone is composed of the informal lower and upper members. In the study area the Edwards Group consists only of the informal basal nodular member of the Kainer Formation The faulting and fracturing in the study area are part of the Miocene-age Balcones fault zone, an extensional system of faults that generally trends southwest to northeast in south-central Texas. An igneous dike, containing aphanitic texture, cuts through part of the Anhalt quadrangle near the confluence of Honey Creek and the Guadalupe River. The dike penetrates the Cow Creek Limestone Member and the lower part of the Hensell Sand Member outcropping at three locations. The hydrostratigraphic units of the Edwards and Trinity aquifers have been mapped and described herein using a classification system developed by Choquette and Pray (1970), which is based on porosity types being fabric or not-fabric selective. The naming of hydrostratigraphic units is also based on preexisting names and topographic or historical features that occur in outcrop. The only hydrostratigraphic unit of the Edwards aquifer present in the study area is hydrostratigraphic unit VIII. The mapped hydrostratigraphic units of the upper Trinity aquifer are, from top to bottom: the cavernous, Camp Bullis, upper evaporite, fossiliferous, and lower evaporite, and they are interval equivalent to the upper member of the Glen Rose Limestone. The middle Trinity aquifer contains (interval equivalent to the lower member of the Glen Rose Limestone) contains, from top to bottom: the Bulverde, Little Blanco, Twin Sisters, Doeppenschmidt, Rust, and Honey Creek hydrostratigraphic units. The lower part of the middle Trinity aquifer is formed by the Hensell, Cow Creek and Hammett hydrostratigraphic units which are interval equivalent to the Hensell Sand Member, the Cow Creek Limestone, and the Hammett Shale Member, respectively, of the Pearsall Formation. Reference: Choquette, P.W., and Pray, L.C., 1970, Geologic nomenclature and classification of porosity in sedimentary carbonates: American Association of Petroleum Geologists Bulletin, v. 54, no. 2, p. 207-250. Purpose: These data are intended to illustrate the geographical extent of the surficial hydrostratigraphic units and faulting within Comal, Blanco, and Kendall Counties in South Texas. Supplemental_Information: Map political location: Compilation scale: 1:24,000 Base maps used are the U.S. Geological Survey 7.5-minute quadrangles: Anhalt, Texas, 2013; Fischer, Texas, 2013; and Spring Branch, Texas, 2013 The GIS data is provided in two formats: file geodatabase: SIM3333_2015.gdb shapefiles: Geo_Line.shp and Geo_Poly.shp Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2014 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -98.508582 East_Bounding_Coordinate: -98.246579 North_Bounding_Coordinate: 30.009862 South_Bounding_Coordinate: 29.738670 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: Anhalt Quadrangle Theme_Keyword: Balcones fault zone Theme_Keyword: Corbula bed Theme_Keyword: Cow Creek Limestone Member Theme_Keyword: Cretaceous Theme_Keyword: Edwards Group Theme_Keyword: Edwards Plateau Theme_Keyword: fault Theme_Keyword: Fischer Quadrangle Theme_Keyword: formation Theme_Keyword: fracture Theme_Keyword: geologic framework Theme_Keyword: geology Theme_Keyword: groundwater Theme_Keyword: Hammett Shale Member Theme_Keyword: Hensell Sand Member Theme_Keyword: hydrogeology Theme_Keyword: hydrostratigraphy Theme_Keyword: Kainer Formation Theme_Keyword: karst Theme_Keyword: Lower Glen Rose Limeston Theme_Keyword: Spring Branch Quadrangle Theme_Keyword: Trinity aquifer Theme_Keyword: Trinity Group Theme_Keyword: Upper Glen Rose Limestone Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Place_Keyword: Anhalt Place_Keyword: Blanco County Place_Keyword: Canyon Lake Place_Keyword: Comal County Place_Keyword: Fischer Place_Keyword: Guadalupe River Place_Keyword: Honey Creek Place_Keyword: Kendall County Place_Keyword: Little Blanco River Place_Keyword: Spring Branch Place_Keyword: Texas Place_Keyword: United States Place_Keyword: USA Access_Constraints: None Use_Constraints: Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. There is no guarantee concerning the accuracy of the data. No warranty expressed or implied is made regarding the accuracy or utility of the data on any other system or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. Users should not use this data for critical applications without a full awareness of its limitations. Acknowledgement of the originating agencies would be appreciated in products derived from these data. Any user who modifies the data is obligated to describe the types of modifications they perform. User specifically agrees not to misrepresent the data, nor to imply that changes made were approved or endorsed by the U.S. Geological Survey. Please refer to http://www.usgs.gov/privacy.html for the USGS disclaimer. Native_Data_Set_Environment: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcGIS 10.0.5.4400 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Original data were collected in the field with the use of hand held global positioning system (gps) enabled devices. Attributes were tagged to the waypoints taken while field mapping. Authors have reviewed the attributes for accuracty and completeness. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, and other errors. ArcGIS software was used to create topological relations among features. Features were not duplicated, but coincident lines may exist between data layers where appropriate. Completeness_Report: Original hydrostratigraphic map units were field mapped and digitized at appropriate resolution for portrayal at 1:24,000 scale. Data are complete; no features were eliminated or generalized. The hydrostratigraphic map unit properties are described in the accompanying Scientific Investigations Map 3333. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Allan K. Clark Originator: Charles D. Blome Originator: Robert R. Morris Publication_Date: 2014 Title: Geology and hydrostratigraphy of Guadalupe River State Park and Honey Creek State Natural Area, Kendall and Comal Counties, Texas Edition: 1 Geospatial_Data_Presentation_Form: report and vector digital data Series_Information: Series_Name: Scientific Investigations Map Issue_Identification: 3303 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://dx.doi.org/10.3133/sim3303 Source_Scale_Denominator: 24000 Type_of_Source_Media: online Source_Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2011 Ending_Date: 2014 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: SIM 3303 Source_Contribution: Data provided surficial hydrostratigraphic units and faulting of the Guadalupe River State Park and Honey Creek State Natural Area in Kendall and Comal Counties, Texas Process_Step: Process_Description: Digital U.S. Geological Survey 7.5-minute topographic quadrangle maps were used as a field base map to aid in reconnaissance and field mapping efforts. The digital topographic quadrangles were used as the base on which to make the notation of identified features. Process_Date: 2014 Process_Step: Process_Description: Hardcopy printouts of the digital 2013 U.S. Geological Survey 7.5-minute topographic quadrangles were also used in field mapping efforts. Hydrostratigraphic unit contacts, faults, and descriptions were drawn onto the quadrangles. Process_Date: 2014 Process_Step: Process_Description: Waypoints were collected in the field with the use of hand held gps units and gps enabled devices. Each collected waypoint was labeled with descriptions for the identified hydrostratigraphic units and/or faults. Process_Date: 2014 Process_Step: Process_Description: Waypoints were transferred to a geographic information system and used to assist in the digitization process to create the hydrostratigraphic unit contacts and faults at the appropriate scale. Process_Date: 2014 Process_Step: Process_Description: The hardcopy U.S. Geological Survey 7.5 minute topographic quadrangles with the drawn hydrostratigraphic contacts and faults were scanned and georeferenced. Process_Date: 2014 Process_Step: Process_Description: The field mapped hydrostratigraphic contacts and faults were digitized from the georeferenced images with a geographic informations sytem. Process_Date: 2014 Process_Step: Process_Description: Topological errors were checked and corrected for duplicate polygons and lines, gaps, overshoots, undershoots and dangles. Process_Date: 2014 Process_Step: Process_Description: Each digitized quadrangle was then merged to create a seamless hydrostratigraphic map of the study area. Process_Date: 2014 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 917 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: String Point_and_Vector_Object_Count: 1456 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 14 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.9996 Longitude_of_Central_Meridian: -99.0 Latitude_of_Projection_Origin: 0 False_Easting: 500000.0 False_Northing: 0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.0001 Ordinate_Resolution: 0.0001 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: Geo_Poly Entity_Type_Definition: Polygon features of mapped hydrostratigraphic units within the study area. Entity_Type_Definition_Source: Project Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Geo_Unit_Label Attribute_Definition: Abbreviation for each mapped hydrostratigraphic unit within the project boundary. (In shapefile, attribute label appears as "Geo_Unit_L".) Attribute_Definition_Source: Project Attribute_Domain_Values: Unrepresentable_Domain: Informal hydrostratigraphic unit abbreviations: Kkbn (VIII), Kgrc (Cavernous), Kgrcb (Camp Bullis), Kgrue (Upper evaporite), Kgrf (Fossiliferous), Kgrle (Lower evaporite), Kgrb (Bulverde), Kgrlb (Little Blanco), Kgrts (Twin Sisters), Kgrd (Doeppenschmidt), Kgrr (Rust), Kgrhc (Honey Creek), Kheh (Hensell), Kcccc (Cow Creek), and Khah (Hammett) Attribute: Attribute_Label: Geo_Unit_Desc Attribute_Definition: Name of each informal hydrostratigraphic unit with the project boundary. (In shapefile, attribute label appears as "Geo_Unit_D".) Attribute_Definition_Source: Project Attribute_Domain_Values: Unrepresentable_Domain: Informal hydrostratigraphic units: VIII (Kkbn), Cavernous (Kgrc), Camp Bullis (Kgrcb), Upper evaporite (Kgrue), Fossiliferous (Kgrf), Lower evaporite (Kgrle), Bulverde (Kgrb), Little Blanco (Kgrlb), Twin Sisters (Kgrts), Doeppenschmidt (Kgrd), Rust (Kgrr), Honey Creek (Kgrhc), Hensell (Kheh), Cow Creek (Kcccc), and Hammett (Khah) Attribute: Attribute_Label: Shape_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: Shape_Area Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Detailed_Description: Entity_Type: Entity_Type_Label: Geo_Line Entity_Type_Definition: Line features of mapped structural features within the study area. Entity_Type_Definition_Source: Project Attribute: Attribute_Label: OBJECTID Attribute_Definition: Internal feature number. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: Type Attribute_Definition: Identifiers for each line feature. Attribute_Definition_Source: Project Attribute_Domain_Values: Unrepresentable_Domain: Defines the line feature as boundary nad83, contact, contact inferred, Corbula bed, Corbula bed inferred, fault, fault inferred, fracture, HC mapping boundary, and igneous. Attribute: Attribute_Label: Shape_Length Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: Esri Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: USGS, Information Services Contact_Address: Address_Type: mailing Address: Box 25286, Mail Stop 306 City: Denver State_or_Province: Colorado Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: usgsstores@usgs.gov Resource_Description: Scientific Investigations Map 3333 Distribution_Liability: This database, identified as SIM 3333, has been approved for release and publication by the U.S. Geological Survey (USGS). Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the U.S. Government may be held liable for any damages resulting from its authorized or unauthorized use. Although these data have been processed successfully on a computer system at the U.S. Geological Survey (USGS), no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The USGS shall not be held liable for improper or incorrect use of the data described and/or contained herein. Although this information product is in the public domain, it may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: esri Arc Geodatabase Format_Version_Number: 10.0.5.4400 File_Decompression_Technique: Winzip 4.83 MB Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/3333/ Network_Resource_Name: http://dx.doi.org/10.3133/sim3333 Fees: None Metadata_Reference_Information: Metadata_Date: 20140716 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Position: Public Information Officer Contact_Address: Address_Type: mailing and physical Address: 1505 Ferguson Lane City: Austin State_or_Province: Texas Postal_Code: 78754 Contact_Voice_Telephone: (512)927-3500 Contact_Electronic_Mail_Address: gs-w-txpublicinfo@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998