Metadata: Identification_Information: Citation: Citation_Information: Originator: Karl S. Kellogg Publication_Date: 2001 Title: Geologic map of the Lockwood Valley quadrangle, Ventura County, California Series_Information: Series_Name: U.S. Geological Survey Open-File Report Issue_Identification: 99-130 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/of/1999/ofr-99-0130/ Description: Abstract: The Lockwood Valley quadrangle is located in the western Transverse Ranges of California, about 10 km southwest of Frazier Park. It includes the western flank of Frazier Mountain, southern Lockwood Valley, and a region of the Los Padres National Forest near northern Piru Creek. The oldest rocks are mostly biotite augen gneiss, in the hanging wall of the Frazier Mountain thrust and in a large body south of the thrust. A U-Pb zircon age for the gneiss is 1690+5 Ma (W. Premo, unpublished data). Two Cretaceous intrusive rocks are named the quartz monzonite of Sheep Creek and the coarse-grained granodiorite of Lockwood Peak. A U-Pb zircon age on the latter is 76.05+0.22 Ma (W. Premo, unpublished data). The northeastern edge of a large Eocene marine basin, comprising the sandstones, shales, and conglomerates of the Juncal Formation, occupies the southwestern 25 percent of the quadrangle. Miocene fluvial rocks, including coarse boulder conglomerates, sandstones, and shale, of the Caliente Formation crop out mostly in the northwestern part of the quadrangle. Commercially exploitable Lockwood Clay unconformably overlies the Caliente, which, in turn, is overlain by the mostly fluvial Pliocene Quatal Formation. Two major south-directed thrusts, the Frazier Mountain thrust and the South Frazier Mountain thrust, place crystalline rocks over Miocene and Pliocene sedimentary rocks. The South Frazier Mountain thrust is transected by the newly recognized, north-directed Lockwood Peak reverse fault. In addition, the newly recognized south-directed Yellowjacket thrust displaces rocks of the Pliocene Quatal Formation. Purpose: To update and reinterpret earlier geologic mapping, and to achieve a uniform regional geologic database. Supplemental_Information: Map political location: Ventura County, California Compilation scale: 1:24,000 Geology mapped in 1996 and 1997. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular. Mapping is continuing in adjacent quadrangles and revisions may be made as required. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -119.125 East_Bounding_Coordinate: -119.0 North_Bounding_Coordinate: 34.75 South_Bounding_Coordinate: 34.625 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geology Theme_Keyword: geologic maps Theme_Keyword: bedrock geologic units Theme_Keyword: geologic structure Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Theme_Keyword: Geologic map Theme_Keyword: Lockwood Valley, California Theme_Keyword: Piru Creek Theme_Keyword: Lockwood Creek Theme_Keyword: Mutau Flats Theme_Keyword: Los Padres National Forest Theme_Keyword: Cretaceous rocks Theme_Keyword: Early Proterozoic rocks Theme_Keyword: Tertiary rocks Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f06111 = Ventura Place: Place_Keyword_Thesaurus: Board of Geographic Names, Geographic Names Information System (GNIS) Place_Keyword: USA Place_Keyword: California Place_Keyword: Ventura County Stratum: Stratum_Keyword_Thesaurus: none Stratum_Keyword: Frazier Mountain Gneiss Stratum_Keyword: Caliente Formation Stratum_Keyword: Lockwood Clay Stratum_Keyword: Quatal Formation Access_Constraints: none Use_Constraints: none. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/of/1999/ofr-99-0130/ofr-99-0130so.pdf Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Set_Credit: Compilation of map by Karl Kellogg; Radiometric data by Wayne Premo. Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the geologist that made the observations. 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 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 attributes, and other errors. Automated (ARC/INFO) 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. The map was reviewed by one other geologist for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are complete: no features were eliminated or generalized. Unit properties are described in the text explanation. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Lines were primarily mapped by ground investigation and photointerpretation of 1:24,000-scale color aerial photographs. These lines were digitized from the topographic field sheets and from annotated aerial photographs. Most digitized positions on the map are estimated to have about 20 m horizontal accuracy. Additional point observations were added using positions determined by a Rockwell PLGR-96 GPS unit with horizontal accuracy of about 10 meters. There is no elevation data in the database. Lineage: Process_Step: Process_Description: Polygons, lines, and points representing geologic features and data points were digitized from scale-stable compilation materials using the GSMCAD public domain program (USGS Open-File Report 96-007). Process_Date: 1999 Process_Step: Process_Description: The map data were exported to ARC/INFO using the GSMCAD export function to create ARC generate ASCII files. The ASCII files were then imported into ArcInfo using the GENERATE routine, and polygon topology built. Process_Date: 2000 Process_Step: Process_Description: Text map unit descriptors were added to the .AAT and .PAT database files for each coverage. Process_Date: 2000 Process_Step: Process_Description: Draft check plots of the geologic map and explanation were created and submitted for peer review. Geologists reviewed the plots for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Revisions were made to the geospatial database as needed. Process_Date: 2000 Process_Step: Process_Description: Coverages were edited and revised in ArcInfo 8.0.2 to reflect editorial changes and to further attribute polygons with descriptions and all features with source information. Process_Date: 2000 Process_Step: Process_Description: Final revisions to the digital database were made and a map layout (browse graphic) prepared in Adobe Illustrator and saved in PDF format. Process_Date: 2000 Process_Step: Process_Description: The geospatial database files and metadata were quality checked for completeness and consistency. Process_Date: 2001 Process_Step: Process_Description: The digital database was quality checked by the data manager, USGS Central Region Earth Surface Processes team. Process_Date: 2001 Process_Step: Process_Description: Final preparation of the geospatial database for distribution, and preparation of map-on-demand files and metadata. Process_Date: 2001 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20010212 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Karl S. Kellogg Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: MS 913, Box 25046 Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-1305 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Lambert Conformal Conic Lambert_Conformal_Conic: Standard_Parallel: 34.03333333333 Standard_Parallel: 35.46666666667 Longitude_of_Central_Meridian: -118.0 Latitude_of_Projection_Origin: 33.5 False_Easting: 0.00000 False_Northing: 0.00000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 10 Ordinate_Resolution: 10 Planar_Distance_Units: Meters 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 is supplied in ARC/INFO export and shape file formats. DATABASE STRUCTURE - ARC/INFO ==================================== The database of the map consists of three coverages (root name = lw). This GIS database includes related look-up tables, which store detailed attribute information. Arc/Info 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. lwpoly coverage: Contains all contact lines and labelpoints for each geologic polygon. In the lwpoly.pat INFO file the LABEL item indicates the rock unit label (abbreviation) used to label the unit on the map. The DESC item contains the formal or informal unit name. The SOURCE item contains the numeric code used to identify the data source for the rock unit. The SYMBOL item contains the shadeset symbol number used by ArcInfo to plot a filled/shaded polygon. The symbol numbers in this coverage refer to the color524.shd shadeset. In the coverage's lwpoly.aat INFO file the NAME item contains the name given to the structural feature. The SOURCE item contains the numeric code used to identify the data source for the structural feature. The SYMBOL item contains the lineset symbol number used by ArcInfo to plot a line. The symbol numbers in this coverage refer to the geol_sfo.lin lineset. In the coverage's lwpoly.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. The INFO structure of these files is listed below: >LWPOLY.PAT >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 LWPOLY# 4 5 B - > 21 LWPOLY-ID 4 5 B - > 25 SOURCE 4 4 I - > 29 LABEL 10 10 C - > 39 DESC 100 100 C - > 139 SYMBOL 3 3 I - >LWPOLY.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 - >LWPOLY.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 - >LWPOLY.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 LWPOLY# 4 5 B - > 29 LWPOLY-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 30 30 C - > 66 SOURCE 4 4 I - > 70 SYMBOL 3 3 I - >LWPOLY.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 - lwline coverage: contains limit of overturned strata, cross-section lines, and a synclinal fold axis line. In the lwline.aat INFO file the NAME item indicates the name given to the structural feature. The SOURCE item contains the numeric code used to identify the data source for the structural feature. The DESC item contains the written description or explanation of the contact, boundary, or structural feature. The SYMBOL item contains the lineset symbol number used by ArcInfo to plot a line. The symbol numbers in this coverage refer to the geol_sfo.lin lineset. In the coverage's lwline.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. The INFO structure of these files is listed below: >LWLINE.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 LWLINE# 4 5 B - > 29 LWLINE-ID 4 5 B - > 33 LINECODE 3 3 I - > 36 NAME 30 30 C - > 66 SOURCE 4 4 I - > 70 DESC 100 100 C - > 170 SYMBOL 3 3 I - >LWLINE.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 - >LWLINE.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 - >LWLINE.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 - lwpnt coverage: Contains points recording site-specific observations and measurements, such as strike and dip of bedding. In the lwpnt.pat INFO file the PTTYPE item lists the type of point symbol, e.g., strike and of inclined bedding. The SYMBOLCD 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. Strike is an azimuthal angle (measured in degrees from 0 to 360 in a clockwise direction from North). The DIP item contains the dip of bedding. This value is an angle measured (in degrees 0 to 90) down from the horizontal; thus a horizontal dip is 0 degrees and a vertical dip is 90 degrees. The BEARING item contains the bearing of lineation. Bearing is an azimuthal angle (measured in degrees from 0 to 360 in a clockwise direction from North). The PLUNGE item contains the plunge of lineation. This value is an angle measured (in degrees 0 to 90) down from the horizontal; thus a horizontal plunge is 0 degrees and a vertical plunge is 90 degrees. The CALCANG item contains an interim value used to calculate SYM$ANGLE. The SYM$ANGLE item is the angle used to mathematically rotate the map point symbol to its proper orientation on the map. This item was set equal to the pseudoitem '$ANGLE' (calc SYM$ANGLE = $ANGLE). The SOURCE item lists the numeric code used to identify the data source. In the coverage's lwpnt.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item lists the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format. The INFO structure of these files is listed below: >LWPNT.PAT >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 LWPNT# 4 5 B - > 21 LWPNT-ID 4 5 B - > 25 PTTYPE 80 80 C - > 105 SYMBOLCD 3 3 I - > 108 STRIKE 3 3 I - > 111 DIP 3 3 I - > 114 BEARING 3 3 I - > 117 PLUNGE 3 3 I - > 120 CALCANG 4 4 I - > 124 SYM$ANGLE 4 4 I - > 128 SOURCE 4 4 I - >LWPNT.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 - Auxiliary files: color524.shd: This shadeset file defines the rgb values of colors assigned to polygons in the lwpoly coverage (see SYMBOL item). 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. >LABEL DESC >Qa Alluvium (Holocene) >Qc Colluvium (Holocene) >Qac Alluvium, loess, and colluvium, undifferentiated (Holocene) >Qls Landslide deposits (Holocene) >Qt Talus (Holocene) >Qdf Debris-flow deposit (Holocene and upper Pleistocene) >Qlo Older landslide deposit (upper? Pleistocene) >Qoa Older alluvium (upper? Pleistocene) >Qbd Boulder diamicton (Pleistocene) >Qhc High-level conglomerate (lower? Pleistocene) >Tqc Quatal Formation, sandstone and conglomerate member (Pliocene) >Tqs Quatal Formation, sandstone and siltstone member (Pliocene) >Tqa Quatal Formation, arkosic member (Pliocene) >Tqb Quatal Formation, brown member (Pliocene) >Tqg Quatal Formation, green claystone and sandstone member (Pliocene) >Tlc Lockwood Clay (Pliocene or Miocene) >Tc Caliente Formation, undifferentiated (Miocene) >Tcs Caliente Formation, green claystone and sandstone member (Miocene) >Tjm Juncal Formation, mixed shale and sandstone member (Eocene) >Tjs Juncal Formation, sandstone member (Eocene) >Tjc Juncal Formation, conglomerate member (Eocene) >Kgs Quartz monzonite of Sheep Creek (Upper Cretaceous) >Kgl Granodiorite of Lockwood Mountain (Upper Cretaceous) >Pag Frazier Mountain augen gneiss (Lower Proterozoic) >Pbg Biotite gneiss (Lower Proterozoic) >Pqfg Quartzofeldspathic gneiss (Lower Proterozoic) >DEFINITION OF LINECODES IN THE COVERAGES (LINECODES AND DESC IN THE .CON AND .STR >FEATURES IN THE DATABASE------------------------- >LINECODE | DESC > 1 | contact > 2 | contact, approximate (dashed) > 3 | contact, concealed (dotted) > 41 | water body > 81 | map boundary (lines of latitude or longitude) > 88 | limit of overturned strata > 98 | cross-section line > 102 | fault, unknown offset, approximate (dashed) > 103 | fault, unknown offset, concealed (dotted) > 111 | normal fault > 112 | normal fault, approximate (dashed) > 113 | normal fault, concealed (dotted) > 161 | reverse fault > 162 | reverse fault, approximate (dashed) > 163 | reverse fault, concealed (dotted) > 173 | thrust fault, concealed (dotted) > 403 | horizontal anticline, concealed > 404 | plunging anticline, approximate > 406 | plunging anticline, concealed > 412 | double plunging anticline (out), concealed > 413 | horizontal syncline > 415 | horizontal syncline, concealed > 416 | plunging syncline > 417 | plunging syncline, approximate > 418 | plunging syncline, concealed > 442 | overturned syncline, concealed Entity_and_Attribute_Detail_Citation: For description of map units, refer to map text (in file ofr-99-0130-p.pdf) Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Central Publications Group Address: U.S. Geological Survey Address: MS 902, Box 25046 DFC City: Lakewood State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Contact_Electronic_Mail_Address: tpinto@usgs.gov Distribution_Liability: Although this digital spatial data has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. This map is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, Shapefile Format_Version_Number: 8.0.2 File_Decompression_Technique: unzip ZIP archive Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1999/ofr-99-0130/ofr-99-0130.zip Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, Shapefile Format_Version_Number: 8.0.2 File_Decompression_Technique: gzip -d tar xvf or tar xzvf (GZIP compressed TAR file) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/1999/ofr-99-0130/ofr-99-0130.tar.gz Fees: none Metadata_Reference_Information: Metadata_Date: 20160610 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998