Identification_Information: Citation: Citation_Information: Originator: Michael N. Machette Originator: Ren A. Thompson Originator: Theodore R. Brandt Publication_Date: 2008 Title: Preliminary Geologic Map of the North-Central Part of the Alamosa 30’ x 60’ Quadrangle, Alamosa, Conejos and Costilla Counties, Colorado Edition: version 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: USGS Open-File Report Issue_Identification: OF 2008-1124 Publication_Information: Publication_Place: Denver, Colorado, U.S.A. Publisher: United States Geological Survey Online_Linkage: http://pubs.usgs.gov/of/2008/1124 Description: Abstract: This geologic map is based on Machette and Thompson's mapping of four 7.5- minute quadrangles (Baldy, Blanca, Blanca SE, and Lasauses). The map area includes the San Luis Hills (Oliogocene rocks) on the south and the Basaltic Hills (Pliocene basalt) on the east. North and west of these features, most of the low-lying ground is comprised of surficial deposits of Quaternary age, including deposits of ancient Lake Alamosa (Pliocene to middle Quaternary). The oldest rocks exposed in the map area are volcanic flows, breccias and dikes of the Conejos Formation (Tcu and Tcl, about 30 Ma). Overlying this thick package of rocks are relatively flat-lying basalts of the Hindsdale Formation (Th, about 26 Ma). These basalts form steep-sided hills throughout the southern half of the map area. The next younger deposits are newly recognized coarse-grained conglomerates (Tsfv)that comprise basal, syntectonic facies of the Santa Fe Group, which is an Oligocene to middle Pleistocene basin-fill unit. The conglomerates are entirely volcaniclastic and were derived from erosion of the San Luis Hills during inception of the Rio Grande rift, about 25 Ma. The bedrock of the San Luis Hills had been mapped in 1989 by Thompson and Machette, but is modified slightly herein. The bulk of the overlying Santa Fe Group sediment is much finer grained, having been deposited as distal sediment derived from erosion of the Sangre de Cristo Mountains to the east and north. Rare exposures of the Santa Fe Group sediment show that they are comprised of siltstones, sandstones, and minor fluvial conglomerates. The Servilleta Basalt (Pliocene) is interbedded in the Santa Fe Group, and thus serves as a local datum for subdividing upper and lower members. Sediment of the upper member (QTsf) is preserved north of Trinchera Creek, whereas coeval sediment of the Alamosa Formation (QTla) is exposed in Hansen Bluff, which is the type locality of Siebenthal (1910). Quaternary alluvial deposits, which cover about 80 percent of the map area, are subdivided into three Pleistocene units and three Holocene units. The oldest Pleistocene gravel (unit Qao) forms an extensive coalesced alluvial fan and piedmont surface west of Blanca that grades toward the Rio Grande (at and south of Hansen Bluff). Lake Alamosa's last high stand (about 440 ka) cut shorelines into Qao and built barrier bars (Qlag) and lagoons (Qlam) in valleys around some of the bedrock- cored hill. The primary geologic hazards in the map area are from blowing sand (Qes and Qed), localized flooding along Trinchera Creek and the Rio Grande, and from earthquakes on the Central Sangre de Cristo fault zone and associated faults, some of which traverse the Basaltic Hills. Paleoseismic investigations on the Central Sangre de Cristo fault zone (east and north of the map area) revealed evidence for late Pleistocene to early Holocene movement near San Luis, Colorado, about 5 km southeast of the map area, and there are fault scarps on the younger alluvium (Qay) in the town of Fort Garland, 5 km east of the map area. 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 surface deformation, eolian sedimentation, and flooding. Supplemental_Information: Coverages included in this geospatial database: alancgeo: polygon coverage of geologic units and faults alancage: age location point features 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 currently planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -105.7500000 East_Bounding_Coordinate: -105.5000000 North_Bounding_Coordinate: 37.50000000 South_Bounding_Coordinate: 37.25000000 Keywords: Theme: Theme_Keyword_Thesaurus: American Geological Institute Glossary of Geology Theme_Keyword: Radiocarbon ages Theme_Keyword: Rio Grande Theme_Keyword: Smith Reservoir Theme_Keyword: Hansen Bluff Theme_Keyword: Basaltic Hills Theme_Keyword: Trinchera Creek Theme_Keyword: Alamosa Theme_Keyword: Antonito Theme_Keyword: Fort Garland Theme_Keyword: San Luis Theme_Keyword: Highway 160 Theme_Keyword: Blanca Theme_Keyword: Blanca SE Theme_Keyword: Baldy Theme_Keyword: Lasauses Theme_Keyword: Lake Alamosa Theme_Keyword: San Luis basin Theme_Keyword: Rio Grande Rift Theme_Keyword: Geologic map Theme_Keyword: Geologic history Theme_Keyword: Cenozoic rocks Theme_Keyword: Quaternary deposits Theme_Keyword: Hazards Theme_Keyword: Alamosa Formation Theme_Keyword: Santa Fe Group Theme_Keyword: Servilleta Basalt Theme_Keyword: Hinsdale Formation Theme_Keyword: Conejos Formation 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: Blanca Place_Keyword: Alamosa County Place_Keyword: Conejos County Place_Keyword: Costilla County Temporal: Temporal_Keyword_Thesaurus: American Geological Institute Glossary of Geology Temporal_Keyword: Holocene Temporal_Keyword: Pleistocene Temporal_Keyword: Pliocene Temporal_Keyword: Miocene Temporal_Keyword: Oligocene Temporal_Keyword: Tertiary Temporal_Keyword: Quaternary 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 1:50,000. 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/of/2008/1124/downloads/1124.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 from 2004 to 2007, and represents a partial revision of their mapping of the San Luis Hills (Thompson and Machette, 1989). Theodore Brandt, U.S. Geological Survey, served as primary author of the GIS database. Jeremy Workman, U.S. Geological Survey, converted illustration files to GIS format and assisted in GIS database attribution and revision. Native_Data_Set_Environment: Windows_XP, Intel ARC/INFO 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 1:50,000 were eliminated or generalized. The smallest area represented is approximately 45 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 25 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 Source_Information: Source_Citation: Citation_Information: Originator: Thompson, R.A. Originator: Machette, M.N. Title: Geologic map of the San Luis Hills area, Conejos and Costilla Counties, Colorado Publication_Date: 1989 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Map Issue_Identification: I-1906 Source_Scale_Denominator: 50000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Source_Currentness_Reference: publication date Source_Citation_Abbreviation: Thompson and Machette (1989) Source_Contribution: geologic data source Process_Step: Process_Description: The geologic mapping was conducted by Michael Machette and Ren Thompson from 2004 to 2007, and represents a partial revision of their mapping of the San Luis Hills (Thompson and Machette, 1989). Process_Date: 2007 Process_Step: Process_Description: The geologic database was compiled using ArcInfo. Initial digitization of map features was performed in Adobe Illustrator. Data were converted to ArcInfo format using Avenza MaPublisher by Jeremy Workman, U.S Geological Survey. 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: 2007 Process_Step: Process_Description: The geologic database was revised using ArcInfo. 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 Preliminary Geologic Map of the North-Central Part of the Alamosa 30' x 60' Quadrangle, Alamosa and Costilla Counties, Colorado were created by Theodore Brandt, U.S. Geological Survey. Process_Date: 2008 Process_Step: Process_Description: Metadata reviewed and 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. 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. alancgeo 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 alancgeo.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 alancgeo.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 alancgeo.con file. Linecodes greater than 100 are used for structures that are described in the alancgeo.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 alancgeo.ref file. Related look-up table files are alancgeo.con, alancgeo.str, and alancgeo.ref. In the alancgeo.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 alancgeo.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: >ALANCGEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 ALANCGEO# 4 5 B - > 21 ALANCGEO-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 - >ALANCGEO.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 ALANCGEO# 4 5 B - > 29 ALANCGEO-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 150 150 C - > 186 SOURCE 4 4 I - > 190 SYMBOL 4 4 I - >ALANCGEO.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 - >ALANCGEO.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 - > ALANCGEO.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 - alancage coverage: Contains points recording site-specific observations and measurements relating to stratigraphic age. In the alancage.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. “No data” is used where no age information determined at time of publication. In the alancage.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 ALANCAGE# 4 5 B - > 21 ALANCAGE-ID 4 5 B - > 25 PTTYPE 100 100 C - > 125 SAMPLENO 100 100 C - > 225 AGE 150 150 C - > 375 SYMBOL 3 3 I - > 378 SOURCE 4 4 I - > >ALANCAGE.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 alancgeo coverage: >LABEL | DESC >QTla | Alamosa Formation of Siebenthal (1910) (middle Pleistocene to Pliocene) >QTsf | Upper Santa Fe Group (middle Pleistocene to Pliocene) >Qa | Alluvium, undivided (Holocene) >Qaa | Channel alluvium (upper Holocene) >Qac | Alluvium and colluvium, undivided (Holocene and upper Pleistocene) >Qai | Intermediate alluvium (upper and middle Pleistocene) >Qao | Older alluvium (middle Pleistocene) >Qay | Younger alluvium (upper Pleistocene) >Qc | Colluvium, undivided (Holocene to upper Pleistocene) >Qed | Eolian dune sand (Holocene) >Qed/QTla | Eolian dune sand (Holocene) over Alamosa Formation of Siebenthal (1910) (middle Pleistocene to Pliocene) >Qed/Qai | Eolian dune sand (Holocene) over intermediate alluvium (upper and middle Pleistocene) >Qed/Qao | Eolian dune sand (Holocene) over older alluvium (middle Pleistocene) >Qeo/QTla | Older eolian sand (Upper Pleistocene) over Alamosa Formation of Siebenthal (1910) (middle Pleistocene to Pliocene) >Qes | Eolian cover sand (Holocene) >Qes/QTla | Eolian cover sand (Holocene) over Alamosa Formation of Siebenthal (1910) (middle Pleistocene to Pliocene) >Qes/Qai | Eolian cover sand (Holocene) over intermediate alluvium (upper and middle Pleistocene) >Qes/Qao | Eolian cover sand (Holocene) over older alluvium (middle Pleistocene) >Qes/Qlag | Eolian cover sand (Holocene) over shoreline deposits of Lake Alamosa (middle Pleistocene) >Qfp | Floodplain alluvium (Holocene) >Qla | Lake and pond deposits (Holocene and upper Pleistocene) >Qlag | Shoreline deposits of Lake Alamosa (middle Pleistocene) >Qlam | Lagoonal deposits of Lake Alamosa (middle Pleistocene) >Qps | Undivided piedmont-slope deposits (upper and middle Pleistocene) >Qpt | Peat deposits (lower Holocene and upper Pleistocene) >Qsm | Spring-mound deposits (Holocene) >Tcl | Conejos Formation, lower part (Oligocene) >Tcu | Conejos Formation, upper part (Oligocene) >Th | Hinsdale Formation (Oligocene) >Tsb | Servilleta Basalt (Pliocene) >Tsfv | Santa Fe Group, volcaniclastic facies (Miocene and Oligocene) >w | Open water >Coding of LINECODE and NAME attributes in the alancgeo coverage: >LINECODE | NAME >1 | Contact - Certain >2 | Contact - Approximately located >26 | Crest of lacustrine spit or barrier bar - Certain >28 | Crest of lacustrine spit or barrier bar - Concealed >29 | Paleoshoreline - Certain >30 | Paleoshoreline - Approximately located >41 | Shoreline >81 | Map boundary >101 | Fault – Certain >102 | Fault – Approximately located >103 | Fault - Concealed >111 | Normal fault - Certain >113 | Normal fault - Concealed >568 | Quaternary normal fault - Certain >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. alncbasr.tif: A geo-registered raster file north-central portion of the USGS Alamosa, Colorado 1:100,000 scale base map. 1124.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). (Adobe Acrobat 8.0 viewing software is free and can be downloaded at the following URL: http://www.adobe.com/products/acrobat/readstep2.html) Entity_and_Attribute_Detail_Citation: http://wrgis.wr.usgs.gov/open-file/of99-438/ Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Denver Publishing Service Network Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25046 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: none Resource_Description: Open-File Report 2008-1124 Distribution_Liability: This database, identified as OF 2008-1124, 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. 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: USGS Information Services Address: Box 25286 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Resource_Description: Open-File Report 2008-1124 Distribution_Liability: : This database, identified as OF 2008-1124, 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: 2006 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. (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/of/2008/1124/ 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