Identification_Information: Citation: Citation_Information: Originator: Michael N. Machette Originator: Ren A. Thompson Originator: Benjamin A. Drenth Publication_Date: 2008 Title: Geologic Map of the San Luis Quadrangle, Costilla County, Colorado Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Scientific Investigations Map Issue_Identification: SIM 2963 Publication_Information: Publication_Place: Denver, Colorado, U.S.A. Publisher: United States Geological Survey Online_Linkage: http://pubs.usgs.gov/sim/2963/ Description: Abstract: This geologic map is based entirely on new mapping by Machette and Thompson, whereas Drenth supplied the geophysical data and interpretations. The map area includes the northern part of San Pedro Mesa and its extension (San Luis Mesa, informally named herein) north of Culebra Creek. The basalt-covered mesas are uplifted as a horst between the southern Sangre de Cristo fault zone (on the west) and the San Luis fault zone on the east. The map also includes the northern part of the Sanchez graben, a deep structural basin that lies between the San Luis fault zone (on the west) and the central Sangre de Cristo fault zone on the east. The oldest rocks exposed in the map area are the Santa Fe Group (Tsf and QTsf). In places, these sedimentary rocks are separated by the Servilleta Basalt (Tsb), a series of Pliocene flood basalts dated at 3.7-4.8 Ma in the region. Servilleta Basalt covers the San Pedro and San Luis mesas, whereas extensive landslide deposits mantle the steeper margins of the mesas. Rare exposures of the Santa Fe Group sediment consist of siltstones, sandstones, and minor fluvial conglomerates. The Santa Fe Group is informally divided into upper and lower parts based on their stratigraphic position relative to the Servilleta Basalt. The lower part (Tsf) underlies the basalt and is upper Oligocene to Pliocene. The upper part (QTsf) overlies the basalt (or is in a position above the basalt) and is Pliocene to lower middle Pleistocene. The upper part of the Santa Fe Group contains a thick bed of Lava Creek ash that was erupted at 639±2 Ka from the Yellowstone caldera in northwestern Wyoming, thus the enclosing sediment is of early middle Pleistocene age. Most of the low ground surrounding the mesas is covered by surficial deposits of Quaternary age. The piedmont alluvium is subdivided into three Pleistocene units, and three Holocene units. The oldest Pleistocene gravel (Qao) forms extensive coalesced alluvial fans, and a piedmont surface west of San Pedro Mesa that is known as the Costilla Plains. Intermediate (Qai) and young (Qay) alluvium is inset into the older alluvium as fans and terraces. The Holocene sediments (Qfp, Qaa, and Qa) cover most of the low-lying areas in San Luis and along Culebra Creek and are subject to localized flooding. The primary geologic hazards in the map are from earthquakes, landslides and flooding. There are three major fault zones in the area (as discussed above), and they all show evidence for late Pleistocene to possible Holocene movement. Two generations of landslides are mapped (younger and older), and both may have seismogenic origins. Purpose: This digital map can serve various purposes other than the primary one of geologic mapping. The geology can be used in association with topography for land-use planning, hazards analysis, and resource assessments. This map distinguishes rock units based on lithology (rock type and mineralogy), texture (size of particles or clasts), soil development (for surficial units), and age. Although only a few age determinations are available in the map area, additional dating of correlative units from adjacent areas provides support for our age calls. The ages of surficial units are based on common age-related properties, such as surface morphology, height relative to stream channels, and soil development. Using these criteria, experts can use this map to derive thematic maps that show the suitability of surficial or bedrock material for various uses by man, or to derive maps that show areas susceptible to certain hazards, such as faulting, surface deformation, landsliding, and flooding. Supplemental_Information: Coverages included in this geospatial database: sanlgeo: polygon coverage of geologic units and faults sanlage: age location point features sanlpnt: point coverage recording site-specific observations and measurements, such as well locations Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2008 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -105.5000000 East_Bounding_Coordinate: -105.3750000 North_Bounding_Coordinate: 37.2500000 South_Bounding_Coordinate: 37.1250000 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: Geologic map Theme_Keyword: San Luis basin Theme_Keyword: San Luis fault zone Theme_Keyword: Rio Grande rift Theme_Keyword: Geologic history Theme_Keyword: Sanchez graben Theme_Keyword: Cenozoic rocks Theme_Keyword: Quaternary deposits Theme_Keyword: Lava Creek ash Theme_Keyword: Sangre de Cristo fault system Theme_Keyword: central Sangre de Cristo fault zone Theme_Keyword: Landslides Theme_Keyword: Seismic hazards Theme_Keyword: Santa Fe Group Theme_Keyword: Servilleta Basalt Place: Place_Keyword_Thesaurus: U.S. Board of Geographic Names (BGN) Geographic Names Information System (GNIS) Place_Keyword: USA Place_Keyword: United States of America Place_Keyword: Colorado Place_Keyword: Alamosa Place_Keyword: San Luis Place_Keyword: San Pedro Mesa Access_Constraints: None Use_Constraints: None. Users of this geospatial database and geologic information derived there from should acknowledge the U.S. Geological Survey as the source of the data. Although software enables a user to display images at various scales, map data in this report should not be used at scales greater than 1:24,000. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Michael N. Machette Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: MS 980, Box 25046 DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-5838 Contact_Facsimile_Telephone: 303-236-5349 Contact_Electronic_Mail_Address: machette@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/sim/2963/downloads/pdf/2963_map.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Set_Credit: The geologic mapping was conducted by Michael Machette and Ren Thompson. Geophysical data were supplied by Benjamin Drenth. Theodore Brandt, U.S. Geological Survey, served as primary author of the GIS database. Scott Snyders, formerly of U.S. Geological Survey, assisted in GIS database attribution and revision. Paco Van Sistine, U.S. Geological Survey, converted illustration files to GIS format. Native_Data_Set_Environment: Windows_XP, Intel ArcInfo version 9.2 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the geologist that made the field observations and compilation. The attributes of this geospatial data set consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature, and determine how each feature is colored or symbolized. To check the attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial data set and the original analog compilation were corrected as needed. Machine-created listings of unique attribute values were used to identify spelling errors or other inconsistencies, and corrections were made as needed. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closure, and other errors by the authors and by the GIS technician(s) who created the digital database. Automated (ArcInfo) routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. Check plots of the map were reviewed by another geologist and cartographer for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are preliminary. No features that could be accurately represented at a scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 150 square meters. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Most digitized positions on the map that depict distinct contacts between rock formations in the field are estimated to be within 20 m of the actual contact on the land in most instances. Boundaries (lines) between Quaternary units (for example, terrace gravels) that correspond closely to distinct edges of landforms (for example, river terraces) are of comparable accuracy. Boundaries (lines) between some Quaternary units, such as eolian deposits and broad alluvial aprons, are approximately located within an indefinite gradational zone between them. Horizontal positional accuracy is tested by visual comparison of hard copy test plots to source maps or comparing locations of data on a computer monitor to other data layers in the same geographic area. The database contains no elevation data. Accuracy of these digital data indirectly depends on accuracy of the base maps on which the original source geologic maps were compiled. These base maps were made by the U.S. Geological Survey, which routinely checks them for compliance with the National Map Accuracy Standards. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Lewis, R.S. Originator: Derkey, P.D. Title: Digital geologic map of part of the Thompson Falls 1:100,000 quadrangle, Idaho Publication_Date: 1999 Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: OFR 99-438 Source_Scale_Denominator: 100000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1999 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Lewis and Derkey (1999) Source_Contribution: GIS database structure source Process_Step: Process_Description: The geology for the map was compiled by Michael Machette and Ren Thompson, U.S. Geological Survey Process_Date: 2006 Process_Step: Process_Description: The geology map was drawn in Adobe Illustrator by Michael Machette, U.S. Geological Survey. Process_Date: 2006 Process_Step: Process_Description: The Abobe Illustrator files were converted to ArcInfo coverages by Paco Van Sistine, U.S. Geological Survey. Process_Date: 2007 Process_Step: Process_Description: The geologic database was initially attributed and revised using ArcInfo by Scott Snyders, formerly of U.S. Geological Survey. Process_Date: 2007 Process_Step: Process_Description: The geologic database was further attributed and revised using ArcInfo by Theodore Brandt, U.S. Geological Survey. Brandt prepared the scan of the geo-registered base map and served as author of the GIS database. Process_Date: 2007 Process_Step: Process_Description: Checkplots of the coverages were printed and checked against source materials for accuracy and completeness. The database information was checked visually, as well as by using various routines in ArcInfo, for accuracy and consistency. Process_Date: 2008 Process_Step: Process_Description: Metadata for the Geologic Map of the San Luis Quadrangle, Costilla County, Colorado, mapping project were created by Theodore Brandt, U.S. Geological Survey. Process_Date: 2008 Process_Step: Process_Description: Metadata for the Geologic Map of the San Luis Quadrangle, Costilla County, Colorado, mapping project were revised by Theodore Brandt, U.S. Geological Survey. Process_Date: 2008 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 5 Ordinate_Resolution: 5 Planar_Distance_Units: METERS Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: .9996 Longitude_of_Central_Meridian: -105.0000 Latitude_of_Projection_Origin: 0.00 False_Easting: 500000.0000 False_Northing: 0.0000 Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: The data are supplied in ArcInfo export format and ArcView shapefile format. DATABASE STRUCTURE - ArcInfo ==================================== This GIS database includes related look-up tables, which store detailed attribute information. This database structure is more fully described in USGS OFR 99-438 (Lewis and Derkey, 1999). The GIS database structure used in the database includes symbol and pattern items in coverage point, polygon (PAT), and arc (AAT) attribute tables for user convenience. ArcInfo relates for each coverage are saved in a file named .rel. Use the RELATE command with the restore argument at the arc prompt to make the relates active. Alternatively, in ArcTools, use the Relate environment: open dialog in the Manage – Relates flyout menu under the ArcTools menu to make the relates active. sanlgeo coverage: Contains all contact lines and label points for each geologic polygon. In the .pat INFO file the SOURCE item provides a numeric code used to identify the data source for the rock unit. Complete references for the sources listed are listed in the sanlgeo.ref file. The LABEL item indicates the rock unit label (abbreviation) used to label unit on map. The DESC item defines formal or informal unit name. The SYMBOL item contains the shadeset symbol number used by ArcInfo to plot a filled/shaded polygon. The symbol numbers in this item refer to the wpgcmykg.shd shadeset included with the dataset. The PATTERN item contains the pattern number used in the published version of the map. Patterns that correspond with the pattern numbers are displayed in FGDC Doc. # FGDC-STD-013-2006. There is no ArcInfo shadeset that corresponds to these patterns. In the sanlgeo.aat INFO file, the LINECODE item provides a numeric code used to identify type of linear feature. Linecodes less than 100 are used for contacts and boundaries that are described in the sanlgeo.con file. Linecodes greater than 100 are used for structures that are described in the sanlgeo.str file. The NAME item lists the name given to the structural feature. The SOURCE item lists the numeric code used to identify the data source for the linear feature. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset). Complete references for the sources are listed in the sanlgeo.ref file. Related look-up table files are sanlgeo.con, sanlgeo.str, and sanlgeo.ref. In the sanlgeo.con INFO file, the LINECODE item indicates the numeric code (a value less than 100) used to identify type of contact or boundary. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, contact, State boundaries, lines of latitude and longitude used for neatlines). The MODIFIER item lists the line type modifier (that is, approximate, concealed, or gradational). No entry implies 'known.' The CERTAINTY item lists the degree of certainty of contact or boundary (that is, inferred or uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the contact or boundary. In the sanlgeo.str INFO file, the LINECODE item indicates the numeric code (a value greater than 100) used to identify type of structure. The SYMBOL item lists the line symbol number used by ArcInfo to plot the line (symbol numbers refer to the geol_sfo.lin lineset included with the dataset). The TYPE item lists the major type of line (for example, fault or fold-axis). The HORIZONTAL item refers to the type of horizontal fault movement (for example, left-lateral or right-lateral). No entry implies 'unknown' or no strike-slip movement. The VERTICAL item refers to the type of vertical fault movement (for example, normal). No entry implies 'unknown' or no dip-slip movement. The FOLD item refers to the type of fold (for example, anticline or syncline). The PLUNGE item refers to the type of plunge on fold (that is, horizontal, plunging, plunging in, or plunging out). The ACCURACY item refers to the line type modifier indicating degree of accuracy (that is, approximately located, concealed, gradational). No entry implies 'certain.' The CERTAINTY item lists the degree of certainty of structure (that is, inferred, uncertain). No entry implies 'certain.' The DESC item lists the written description or explanation of the structure. The INFO structure of these files is listed below: >SANLGEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 SANLGEO# 4 5 B - > 21 SANLGEO-ID 4 5 B - > 25 SOURCE 4 4 I - > 29 LABEL 10 10 C - > 39 DESC 150 150 C - > 189 SYMBOL 3 3 I - > 192 PATTERN 4 4 I - >SANLGEO.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 8 18 F 5 > 25 SANLGEO# 4 5 B - > 29 SANLGEO-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 150 150 C - > 186 SOURCE 4 4 I - > 190 SYMBOL 3 3 I - >SANLGEO.CON: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 MODIFIER 20 20 C - > 37 CERTAINTY 15 15 C - > 52 DESC 100 100 C - >SANLGEO.STR: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 LINECODE 3 3 I - > 4 SYMBOL 3 3 I - > 7 TYPE 10 10 C - > 17 HORIZONTAL 20 20 C - > 37 VERTICAL 20 20 C - > 57 FOLD 15 15 C - > 72 PLUNGE 15 15 C - > 87 ACCURACY 15 15 C - > 102 CERTAINTY 15 15 C - > 117 DESC 100 100 C - > SANLGEO.REF: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 SOURCE 4 4 I - > 5 SCALE 8 8 I - > 13 AUTHORS 200 200 C - > 213 YEAR 4 4 I - > 217 REFERENCE 250 250 C - sanlage coverage: Contains points recording site-specific observations and measurements relating to stratigraphic age. In the sanlage.pat INFO file, the PTTYPE item lists the type of point symbol (for example, strike and dip of inclined bedding). The SYMBOL item lists the marker symbol used by ArcInfo to identify the type of structural map symbol(symbol numbers refer to the geoscamp2.mrk markerset. The SAMPLENO item lists the alphanumeric sample locality descriptor The AGE item lists the first instance of age data descrip- tion at a point location. In the sanlage.ref INFO file, the SOURCE item lists the numeric code used to identify the data source. The SCALE item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format. >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 SANLAGE# 4 5 B - > 21 SANLAGE-ID 4 5 B - > 125 SAMPLENO 100 100 C - > 225 AGE 150 150 C - > 375 SYMBOL 3 3 I - > 378 SOURCE 4 4 I - > >SANLAGE.REF: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 SOURCE 4 4 I - > 5 SCALE 8 8 I - > 13 AUTHORS 200 200 C - > 213 YEAR 4 4 I - > 217 REFERENCE 250 250 C - sanlpnt coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding In the sanlpnt.pat INFO file, the PTTYPE item lists the type of point symbol (for example, strike and of inclined bedding). The SYMBOL item lists the marker symbol used by ArcInfo to identify the type of structural map symbol(symbol numbers refer to the geoscamp2.mrk markerset). The STRIKE item contains the strike of bedding as well as trend of fold axis, where applicable. Strike is an azimuthal angle. Measured in degrees from 0 to 360 in a clockwise direction from North, the STRIKE value also specifies the dip direction, where the dip direction is 90 degrees clockwise relative to the STRIKE. The DIP item contains the dip of bedding as well as plunge angles, where applicable. This value is an angle measured (in degrees from 0 to 90) down from the horizontal; thus a horizontal dip is 0 degrees and a vertical dip is 90 degrees. In the sanlpnt.ref INFO file, the SOURCE item lists the numeric code used to identify the data source. The SCALE item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format. >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 SANLPNT# 4 5 B - > 21 SANLPNT-ID 4 5 B - > 25 PTTYPE 100 100 C - > 125 SYMBOL 3 3 I - > 128 STRIKE 3 3 I - > 131 DIP 3 3 I - > 134 SOURCE 4 4 I - > >SANLPNT.REF: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 SOURCE 4 4 I - > 5 SCALE 8 8 I - > 13 AUTHORS 200 200 C - > 213 YEAR 4 4 I - > 217 REFERENCE 250 250 C - >Coding of LABEL and DESC attributes in the sanlgeo coverage: >LABEL | DESC >QTsf | Santa Fe Group, upper part (lower middle Pleistocene to Pliocene) >Qa | Stream alluvium, undivided (Holocene) >Qaa | Active stream alluvium (upper Holocene) >Qac | Alluvium and colluvium, undivided (Holocene and upper Pleistocene) >Qaf | Artificial fill (Historic) >Qai | Intermediate stream alluvium (upper and middle Pleistocene) >Qao | Older stream alluvium (middle Pleistocene) >Qay | Younger stream alluvium (upper Pleistocene) >Qc | Colluvium, undivided (Holocene and upper Pleistocene) >Qes | Eolian sand (Holocene) >Qfp | Floodplain alluvium (lower Holocene) >Qla | Lake sediment (Holocene) >Qlsy | Younger landslides (Holocene and upper Pleistocene) >Qlsb | Landslide blocks (upper and middle Pleistocene) >Qlso | Older landslides (upper and middle Pleistocene) >Tsb | Servilleta Basalt (Pliocene) >Tsf | Santa Fe Group, lower part (Pliocene to upper Oligocene) >w | Open water >Coding of LINECODE and NAME attributes in the sanlgeo coverage: >LINECODE | NAME >1 | Contact - Certain >41 | Shoreline >81 | Map boundary >99 | Fault trench location >111 | Normal fault - Certain >112 | Normal fault - Approximately located >113 | Normal fault - Concealed >401 | Anticline - Certain >402 | Anticline - Approximately located >403 | Anticline - Concealed >413 | Syncline - Certain >511 | Landslide scarp >568 | Quaternary normal fault - Certain >569 | Quaternary normal fault - Approximately located >570 | Quaternary normal fault - Concealed Auxiliary files: geol_sfo.lin: This lineset file defines geologic line types in the geologically themed coverages. wpgcmykg.shd: This shadeset file defines the cmyk values of colors assigned to polygons in the geologically themed coverages. sanluisr.tif: A geo-registered raster file of the USGS San Luis, Colorado, 1:24,000 scale base map. 2963_map.pdf: A print-optimized file for viewing and printing a graphics version of the map and accessory elements using Adobe Acrobat viewing software (version 8.0). Entity_and_Attribute_Detail_Citation: http://wrgis.wr.usgs.gov/open-file/of99-438/ Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-(888)-ASK-USGS Resource_Description: Scientific Investigations Map 2963 Distribution_Liability: This database, identified as SIM_2963, has been approved for release and publication by the Director of the 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 United States 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, 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 such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Standard_Order_Process: Non-digital_Form: Available as one printed sheet plus pamphlet. Order from USGS at the address listed above or see for more ordering information. Fees: For current prices of USGS information products, please see Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Denver Publishing Service Center Address: MS 902 Box 25046 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5589 Contact_Electronic_Mail_Address: none Resource_Description: Scientific Investigations Map 2963 Distribution_Liability: This database, identified as SIM_2963, has been approved for release and publication by the Director of the 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 United States 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, 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 such warranty. The U.S. Geological Survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Geological Survey. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE,SHP Format_Version_Number: 9.2 Format_Version_Date: 2007 File_Decompression_Technique: GZIP TAR archive, In UNIX use the command "gunzip -c | tar xvf .tar" In Windows, use WinZip (http://www.winzip.com/) or other programs to extract the file. Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/sim/2963/ Fees: none Metadata_Reference_Information: Metadata_Date: 2008 Metadata_Review_Date: 2008 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Theodore Brandt Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: MS 980, Box 25046 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-1901 Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998