Identification_Information: Citation: Citation_Information: Originator: Peter W. Lipman Originator: John C. Reed, Jr. Publication_Date: 2011 Title: Geologic Map of the Latir Volcanic Field and adjacent areas, Northern New Mexico Edition: 1.1 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Investigations Series Issue_Identification: I-1907 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/imap/i-1907/ Description: Abstract: This is the digital edition of a map originally published in 1989. The geologic data have now been captured digitally are presented here along with images of the printed map sheets as PDF files. This map encompasses all or parts of ten 7.5 minute quadrangles in the Taos Range of the Sangre de Cristo Mountains in northern New Mexico between latitudes 36 degrees 30 minutes and 37 degrees 00 minutes north latitude and 105 degrees 00 minutes and longitude 105 degrees 37 minutes 30 seconds west. Geologic mapping was initiated in this area by the U.S. Geological Survey in response to its mandate under the Wilderness Act of 1964 to evaluate the mineral resource potential of the Latir and Wheeler Peak Wildernesses and the Columbine-Hondo Wilderness Study Area in the Carson National Forest. The mapping was later extended to adjacent areas in order to better understand the regional geology and geologic history of the range. The present map focuses on the early Tertiary (largely Oligocene) Latir Volcanic Field and plutonic rocks associated with it. The basement rocks in the map area are Paleoproterozic amphibolite-facies metasedimentary and metavolcanic rocks intruded by large bodies of quartz monzonite, granodiorite and gabbro dated at between 1750 and 1690 Ma. The basement rocks are locally overlain by Mississippian limestone or by Pennsylvanian and Permian redbeds. The basement rocks were thrust eastward across a thick section of similar late Paleozoic rocks along low-angle faults during the Laramide Orogeny. Post-Laramide erosion largely removed the sedimentary cover from the basement rocks and reduced the topography to a low-relief surface locally overlain by scattered lenses Eocene of Oligocene shale, sandstone, and conglomerate. It was on this surface that the earliest rocks of the Latir Volcanic Field were deposited, beginning in the Oligocene, about 30 Ma. The early volcanic rocks comprise a thick sequence of andesite, dacite, and minor rhyolite, deposited as flows, breccia, and volcaniclastic sediments from numerous local volcanic centers; thin layers of rhyolite tuff are from distant eruptions, some probably in the San Juan Mountains. These volcanic rocks probably record early growth of an upper-crustal batholith. At 25 Ma enormous eruptions of peralkaline rhyolite ash-flow tuff were accompanied by collapse of the roof of the growing batholith to form the Questa Caldera, a volcanic depression at least 14 km across. The ash flows traveled for tens of kilometers from the caldera rims to form a widespread sheet of densely welded tuff; ash also fell back to fill the subsiding caldera depression. Concurrent extension along northwest- trending faults segmented the volcanic edifice and rotated the originally sub-horizontal layers, so that some are nearly vertical. Formation of the caldera was accompanied by further batholith growth, involving intrusion of large plutons of granite, granodiorite, and related rocks into both caldera fill and the adjacent rocks, including both the earlier volcanic rocks and the basement rocks. The large molybdenum deposit along the Red River east of Questa is related to the emplacement of one of these late granitic plutons. Intrusive activity continued into the Miocene. Development of the Rio Grande Rift beginning at about 15 Ma was accompanied by development of the north-south trending normal faults along the western foot of the Taos Range. The rift is filled with thousands of meters of clastic sediments interleaved with basalt flows, some as young as 3.6 Ma. The bounding faults of the rift cut the Questa Caldera so that the western part of the original structure is now deeply buried beneath the rift fill. Purpose: This map provides geologic information for making land-use decisions and evaluating subsurface water resources. The digtal database of the map was funded by the National Cooperative Geologic Mapping Program of the U.S. Geological Survey. Supplemental_Information: Map political location: Colfax and Taos County New Mexico, and Costilla, County, Colorado Compilation scale: 1:48,000 Base maps used are the U.S. Geological Survey 7.5 minute topographic quadrangles for Costilla, Amalia, Cerro, Latir Peak, Comanche Point, Questa, Red River, Red River Pass, Arroyo Seco, Wheeler Peak, and Eagle Nest, Colorado and New Mexico. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1989 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: none planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -105.62500 East_Bounding_Coordinate: -105.25000 North_Bounding_Coordinate: 37.00000 South_Bounding_Coordinate: 36.50000 Keywords: Theme: Theme_Keyword_Thesaurus: AGI Glossary of Geology Theme_Keyword: Rio Grande Rift Theme_Keyword: Santa Fe Group Theme_Keyword: Questa magmatic system Theme_Keyword: Questa caldera Theme_Keyword: Pliocene geology Theme_Keyword: Miocene geology Theme_Keyword: Oligocene geology Theme_Keyword: Mesozoic geology Theme_Keyword: Tertiary geology Theme_Keyword: Paleozoic geology Theme_Keyword: Proterozoic geology Theme_Keyword: Rio Hondo pluton Theme_Keyword: Sulphur Gulch pluton Theme_Keyword: Relica Peak plug or laccolith Theme_Keyword: Rito del Medio pluton Theme_Keyword: Canada Pinabete pluton Theme_Keyword: Cabresto Lake pluton Theme_Keyword: Moly Mine pluton Theme_Keyword: Bear Canyon pluton Theme_Keyword: Virgin Canyon pluton Theme_Keyword: Lucero Peak pluton Theme_Keyword: Red River intrusive complex Theme_Keyword: Blue Lake-Sixmile Creek Thrust Place: Place_Keyword_Thesaurus: U.S. Board of Geographic Names (BGN) Geographic Names Information System (GNIS) Place_Keyword: USA Place_Keyword: Colorado Place_Keyword: New Mexico Place_Keyword: Costilla County Place_Keyword: Taos County Place_Keyword: Colfax County Place_Keyword: San Pedro Mesa Place_Keyword: Costilla, New Mexico Place_Keyword: Comanche Point Place_Keyword: Amalia, New Mexico Place_Keyword: Sunshine, New Mexico Place_Keyword: Questa, New Mexico Place_Keyword: Red River, New Mexico Place_Keyword: Valdez, New Mexico Place_Keyword: Arroyo Seco, New Mexico Place_Keyword: Wheeler Peak Village, New Mexico Place_Keyword: Culebra Range Place_Keyword: Big Costilla Peak Place_Keyword: Ortiz Peak Place_Keyword: Wheeler Peak Place_Keyword: Mount Walter Place_Keyword: Pinabete Peak Place_Keyword: Lobo Peak Place_Keyword: Simpson Peak Place_Keyword: Old Mike Peak Place_Keyword: Baldy Mountain Place_Keyword: Costilla Mountains Place_Keyword: Sangre de Cristo Mountains Place_Keyword: Taos Mountains Place_Keyword: San Luis Valley Temporal: Temporal_Keyword_Thesaurus: Geologic Names Committee Lexicon (Geolex) Temporal_Keyword: Pliocene Temporal_Keyword: Miocene Temporal_Keyword: Oligocene Temporal_Keyword: Mesozoic Temporal_Keyword: Tertiary Temporal_Keyword: Paleozoic Temporal_Keyword: Proterozoic 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 1:48,000. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Theodore R. Brandt Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing Address: P.O. Box 25046, MS 980 Address: Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 303-236-1901 Contact_Electronic_Mail_Address: tbrandt@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/imap/i-1907/downloads/I-1907_map.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Set_Credit: Theodore Brandt, U.S. Geological Survey, served as author of the GIS database. Native_Data_Set_Environment: Windows_XP, Intel ArcInfo version 9.3.1 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the cartographer based on the published printed map. 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 attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial dataset and the original analog or digital 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 cartographer that created the digital database, and the digital reviewer. 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 at least one other geologist for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are complete: no features that could be accurately represented at the compilation scale of 1:48,000 were eliminated or generalized. The smallest area represented is approximately 50 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. Positional accuracy of the digital data is limited to the accuracy of the original published printed map. 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: Geology of Tertiary rocks mapped from 1978 to 1983 by P.W. Lipman, assisted by D.A. Sawyer, T.G. McGimsey, R.B. Gordon, D.A. Jones, and S.B. Linneman. Process_Date: 1983 Process_Step: Process_Description: Pre-Tertiary geology mapped from 1980 to 1984 by J.C. Reed, Jr., J.M. Robertson, and R.A. Wobus, assisted by J.E. Jenkins, F.W. Simonds, I. Klich, E. Bigelow, C.K. Gockley, and K.R. Wirth. Process_Date: 1984 Process_Step: Process_Description: Geologic polygon, line, and point features were digitized and attributed by Ted Brandt in ArcInfo. Process_Date: 2010 Process_Step: Process_Description: Metadata created by Ted Brandt. Process_Date: 2010 Process_Step: Process_Description: Metadata reviewed and revised by Ted Brandt. Process_Date: 2011 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, ArcView shapefile format, and ArcGIS geodatabase format. DATABASE STRUCTURE - ArcInfo coverage format=========================== 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. latgeo 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 latgeo.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 USGS FGDC-STD-013-2006. There is no ArcInfo shadeset that corresponds to these patterns. In the latgeo.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 latgeo.con file. Linecodes greater than 100 are used for structures that are described in the latgeo.str file. The NAME item lists the name given to the linear 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 latgeo.ref file. Related look-up table files are latgeo.con, latgeo.str, and latgeo.ref. In the latgeo.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 latgeo.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: >LATGEO.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 LATGEO# 4 5 B - > 21 LATGEO-ID 4 5 B - > 25 SOURCE 4 4 I - > 29 LABEL 10 10 C - > 39 DESC 250 250 C - > 289 SYMBOL 3 3 I - > 292 PATTERN 3 3 I - >LATGEO.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 LATGEO# 4 5 B - > 29 LATGEO-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 150 150 C - > 186 SOURCE 4 4 I - > 190 SYMBOL 3 3 I - >LATGEO.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 - >LATGEO.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 - > LATGEO.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 - latxs coverage: Contains geologic cross-section lines In the latxs.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 latxs.con file. The NAME item lists the name given to the linear 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 latxs.ref file. Related look-up table files are latxs.con and latxs.ref. In the latxs.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. >LATXS.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 LATXS# 4 5 B - > 29 LATXS-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 150 150 C - > 186 SOURCE 4 4 I - > 190 SYMBOL 3 3 I - > >LATXS.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 - > >LATXS.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 - latage coverage: Contains points recording site-specific observations and measurements of two types of age dated sample localities. The first type of sample locality is uranium-lead age determination on zircon in Proterozoic rocks. The second type of sample locality is interpreted age of Tertiary rocks-based on multiple potassium-argon and fission-track determinations of igneous minerals from single samples at indicated sites; highly discordant determination in brackets. Both of these sample locality ages are expressed in Ma. In the latage.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 point map symbol(symbol numbers refer to the geoscamp2.mrk markerset). The AGE item contains rock-sample ages expressed in Ma. The AGE1 item contains only interpreted age of Tertiary rocks sample localities which have a highly discordant determination in brackets (see Lipman and others, 1986). The SOURCE item lists the numeric code used to identify the data source. In the latage.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 LATAGE# 4 5 B - > 21 LATAGE-ID 4 5 B - > 25 PTTYPE 100 100 C - > 125 AGE 20 20 C - > 145 AGE1 20 20 C - > 165 SYMBOL 3 3 I - > 168 SOURCE 4 4 I - > >LATAGE.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 - latpts coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding In the latpts.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 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. The SOURCE item lists the numeric code used to identify the data source. In the latpts.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 LATPTS# 4 5 B - > 21 LATPTS-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 - > >LATPTS.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 - latpta coverage: Contains points recording site-specific observations and measurements of lineation, such as mineral lineation. In the latpta.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 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. The SOURCE item lists the numeric code used to identify the data source. In the latpta.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 LATPTA# 4 5 B - > 21 LATPTA-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 - > >LATPTA.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 - lathlsd grid: Contains hillshade values derived from U.S. Geological Survey National Elevation Dataset (NED) 10 meter resolution elevation data. The grid's projection is the same Universal Transverse Mercator NAD27 datum projection used for the geologic database coverages. The illumination angle for the hillshade's shaded relief grid was generated at an azimuth of 315 degrees and horizon angle of 45 degrees. In the integer grid's lathlsd.vat INFO file, the VALUE item lists integer values that describe the illumination level of a cell or group of cells forming a zone. The COUNT item list the number of cells in a zone. In the grid's lathlsd.sta INFO file, the MIN item contains the minimum value, the MAX item contains the maximum value, the MEAN item contain the average value, and the STDV item contains the standard deviation. >LATHLSD.VAT > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 VALUE 4 10 B - > 5 COUNT 4 10 B - >LATHLSD.STA > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 MIN 8 15 F 3 > 9 MAX 8 15 F 3 > 17 MEAN 8 15 F 3 > 25 STDV 8 15 F 3 >Coding of LABEL and DESC attributes in the latgeo coverage: >LABEL | DESC >Pz | Sangre de Cristo Formation, Magdalena Group, Terrerro Formation, and Espiritu Santo Formation (Paleozoic) >Qal | Alluvium (Holocene) >Qc | Colluvium (Holocene) >Qf | Alluvial fan (Holocene) >Qfo | Older alluvial fan (Pleistocene) >Ql | Landslide deposits (Holocene and Pleistocene) >Qm | Moraine and till (Pleistocene) >Qm? | Moraine and till, uncertain (Pliestocene) >Qmo | Older moraine(?) (Pleistocene) >Qr | Rock glacier (Holocene) >Qt | Talus (Holocene) >Ta | Andesitic lava flows, undivided (Oligocene) >Tab | Basalitc andesite (Oligocene) >Tac | Andesitic sedimentary rocks (Oligocene) >Taf | Alkali andesite and dacite (Oligocene) >Tah | Hornblende andesite and dacite (Oligocene) >Tai | Andesite (Miocene and Oligocene) >Tap | Pyroxene andesite (Oligocene) >Tapi | Porphyritic andesite and some dacite (Miocene and Oligocene) >Tax | Xenocrystic andesite and dacite (Oligocene) >Tb | Silicic-alkalic basalt and basaltic andesite (Miocene) >Tb1 | Silicic-alkalic basalt and basaltic andesite, lava flow unit 1 (Miocene) >Tb2 | Silicic-alkalic basalt and basaltic andesite, lava flow unit 2 (Miocene) >Tb3 | Silicic-alkalic basalt and basaltic andesite, lava flow unit 3 (Miocene) >Tb4 | Silicic-alkalic basalt and basaltic andesite, lava flow unit 4 (Miocene) >Tbb | Basanitic basalt (Miocene) >Tbm | Basaltic mixed lavas (Miocene) >Tbs | Servilleta Basalt (Pliocene) >Tbs Slump | Servilleta Basalt (Pliocene) >Tbx | Xenocrystic basaltic andesite (Miocene) >Tc | Comendite of Ortiz Peak (Oligocene) >Td | Dacites of Guadaloupe Mountain and Cerro Negro (Pliocene) >Tg | Older biotite granite (Oligocene) >Tgd | Granodiorite and granite (Oligocene) >Tgp | Granite porphyry (Oligocene) >Tgy | Younger granite and aplite (Miocene) >Tm | Monzonite (Oligocene) >Tp | Granitic pegmatite (Oligocene) >Tps | Shale, sandstone, and conglomerate (Lower Oligocene or Eocene) >Tps? | Shale, sandstone, and conglomerate, uncertain (Lower Oligocene or Eocene) >Tq | Latir Peak Quartz Latite, lava flows and domes (Oligocene) >Tqc | Latir Peak Quartz Latite, volcaniclastic rocks (Oligocene) >Tqi | Quartz latite (Miocene and Oligocene) >Tqk | Potassium-feldspar quartz latite (Miocene and Oligocene) >Tr | Rhyolitic lava flows (Oligocene) >Trc | Latir Peak Quartz Latite, Rhyolite of Cordova Creek (Oligocene) >Trg | Rhyolite of Gonzales Ranch (Miocene) >Tri | Rhyolite (Miocene and Oligocene) >Trp | Porphyritic rhyolite (Miocene and Oligocene) >Trpp | Peralkaline rhyolite (Miocene and Oligocene) >Trpx | Coarsely porphyritic rhyolite (Miocene and Oligocene) >Trr | Rhyolite of Relica Peak (Miocene and Oligocene) >Trt | Amalia Tuff, main unit (Oligocene) >Trtl | Amalia Tuff, lithic-rich lower facies (Oligocene) >Trtl? | Amalia Tuff, lithic-rich lower facies, uncertain (Oligocene) >Ts | Santa Fe Group, fine-grained facies (Pliocene and Miocene) >Ts? | Santa Fe Group, fine-grained facies, uncertain (Piocene and Miocene) >Tsc | Santa Fe Group, conglomeratic facies (Pliocene and Miocene) >Tsv | Santa Fe Group, volcaniclastic facies (Pliocene and Miocene) >Tsv? | Santa Fe Group, volcaniclastic facies, uncertain (Pliocene and Miocene) >Tt | Latir Peak Quartz Latite, Tuff of Tetilla Peak (Oligocene) >Tvs | Volcanic sedimentary rocks (Oligocene) >Twt | Latir Peak Quartz Latite, Treasure Mountain(?) Tuff (Oligocene) >Unmapped | Unmapped area >Xa | Amphibolite (Early Proterozoic) >Xa shear | Amphibolite, shear zone (Early Proterozoic) >Xbg | Biotite gneiss (Early Proterozoic) >Xc | Chert (Early Proterozoic) >Xcg | Metaconglomerate (Early Proterozoic) >Xfa | Mixed unit of felsic gneiss (Xfg) and amphibolite (Xa) interlayered in subequal proportions (Early Proterozoic) >Xfa shear | Mixed unit of felsic gneiss (Xfg) and amphibolite (Xa interlayered in subequal proportions, shear zone >Xfg | Felsic gneiss (Early Proterozoic) >Xg | Greenstone (Early Proterozoic) >Xgd | Granodiorite of Jaracito Canyon (Early Proterozoic) >Xgd shear | Granodiorite of Jaracito Canyon (Early Proterozoic) >Xi | Iron-formation (Early Proterozoic) >Xlg | Layered gneiss (Early Proterozoic) >Xlg shear | Layered gneiss, shear zone (Early Proterozoic) >Xmi | Mafic and ultramafic rocks (Early Proterozoic) >Xms | Biotite-muscovite schist and gneiss (Early Proterozoic) >Xp | Pegmatite (Early Proterozoic) >Xph | Phyllite (Early Proterozoic) >Xq | Quartzite (Early Proterozoic) >Xqc | Quartz monzonite of Columbine Creek (Early Proterozoic) >Xqc shear | Quartz monzonite of Columbine Creek, shear zone (Early Proterozoic) >Xqct | Quartz monzonite of Costilla Creek (Early Proterozoic) >Xqct brecc| Quartz monzonite of Columbine Creek, brecciated area (Early Proterozoic) >Xqo | Quartz monzonite of Old Mike Peak (Early Proterozoic) >Xqo shear | Quartz monzonite of Old Mike Peak, shear zone (Early Proterozoic) >Xqs | Muscovite-quartz schist and gneiss (Early Proterozoic) >Xtr | Tonalite of Red River (Early Proterozoic) >Xtr shear | Tonalite of Red River, shear zone (Early Proterozoic) >Xu | Supracrustal and plutonic rocks (Early Proterozoic) >Xvf | Felsic metavolcanic rocks (Early Proterozoic) >Xvm | Mafic metavolcanic rocks (Early Proterozoic) >ds | Mine dumps (Holocene) >g | Gabbro (Early Paleozoic or late Proterozoic?) >tp | Tailings ponds (Holocene) >w | Open water >Coding of LINECODE and NAME attributes in the latgeo coverage: >LINECODE | NAME >1 | Contact - Certain >2 | Contact - Approximately located >4 | Contact - Gradational >5 | Contact - Scratch boundary >41 | Shoreline >45 | Open pit mine boundary - Certain >46 | Open pit mine boundary - Concealed >80 | Quadrangle boundary >81 | Map boundary >82 | Periphery of mapped units >90 | Quaternary block slump - Certain, hachures on downthrown side >91 | Quaternary block slump - Approximately located, hachures on downthrown side >92 | Quaternary block slump - Concealed, hachures on downthrown side >93 | Unconformity - Certain >94 | Unconformity - Approximately located >95 | Unconformity - Concealed >101 | Fault - Certain >102 | Fault - Approximately located >103 | Fault - Concealed >105 | Fault - Approximately located, queried >111 | Normal fault - Certain >112 | Normal fault - Approximately located >113 | Normal fault - Concealed >171 | Thrust fault - Certain >172 | Thrust fault - Approximately located >173 | Thrust fault - Concealed >512 | Diabase dike >512 | Tai dike >512 | Tapi dike >512 | Tqi dike >512 | Tqk dike >512 | Tri dike >512 | Trp dike >512 | Trpx dike >Coding of LINECODE and NAME attributes in the latxs coverage: >LINECODE | NAME >98 | Cross-section line A-A’ >98 | Cross-section line B-B’ >98 | Cross-section line C-C’ >98 | Cross-section line D-D’ >98 | Cross-section line E-E’ >98 | Cross-section line F-F’ >Coding of PTTYPE attributes in the latage coverage: >PTTYPE >Interpreted age of Tertiary rocks sample locality >Uranium-lead age determination on zircon in Proterozoic rocks sample locality >Coding of PTTYPE attributes in the latpts coverage: >PTTYPE >Horizontal foliation in metamorphic rock >Inclined bedding - Showing strike and dip >Inclined bedding, right side up - Showing strike and dip >Inclined foliation - Showing strike and dip >Inclined joint - Showing strike and dip >Inclined layering - Showing strike and dip >Inclined, overturned bedding - Showing strike and dip >Isoclinal axial plane of fold - Showing strike and dip >Non-isoclinal axial plane of fold - Showing strike and dip >Overturned bedding - Showing strike and dip >Vertical bedding - Showing strike >Vertical foliation - Showing strike >Vertical joint - Showing strike >Vertical layering - Showing strike >Coding of PTTYPE attributes in the latpta coverage: >PTTYPE >Horizontal fold axis - Showing bearing >Horizontal mineral lineation - Showing bearing >Inclined crenulation axis - Showing bearing and plunge >Inclined fold axis - Showing bearing and plunge >Inclined mineral lineation - Showing bearing and plunge Auxiliary files: geol_sfo.lin: This lineset file defines geologic line types in the geologically themed coverages. geoscamp2.mrk: This markerset file defines the geologic markers in the geologically themed coverages. wpgcmykg.shd: This shadeset file defines the cmyk values of colors assigned to polygons in the geologically themed coverages. wpgcmykg.style: This style file defines the cmyk values of colors assigned to polygons in the geologically themed geodatabases. I-1907_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 10.0). (Adobe Acrobat viewing software is free and can be downloaded at the following URL: http://www.adobe.com/products/acrobat/readstep2.html) I-1907_xsec.pdf: A print optimized file for viewing and printing a graphics version of the map cross-sections using Adobe Acrobat viewing software (version 10.0). (Adobe Acrobat viewing software is free and can be downloaded at the following URL: http://www.adobe.com/products/acrobat/readstep2.html) I-1907.mxd: ArcMap map document file which contains map layers that reference data sources in the GIS database and cartographic symbolization. I-1907.pmf: An ESRI published map file viewing, querying, and printing the GIS database using ESRI ArcReader software (version 9.3.1 or 10) (ESRI ArcReader viewing software is free and can be downloaded at the following URL: http://www.esri.com/software/arcgis/arcreader/download.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: 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: 1-(888)-ASK-USGS Contact_Electronic_Mail_Address: http://ask.usgs.gov Resource_Description: Miscellaneous Investigations Series I-1907 Distribution_Liability: none. This database, identified as I-1907, 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. Although this information product, for the most part, is in the public domain, it also contains copyrighted material as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. 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,GDB Format_Version_Number: 9.3.1 Format_Version_Date: 2009 File_Decompression_Technique 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/imap/i-1907/downloads/I-1907_map.pdf Fees: none Metadata_Reference_Information: Metadata_Date: 2010 Metadata_Review_Date: 2010 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