Identification_Information: Citation: Citation_Information: Originator: George H. Billingsley and Jessica L. Wellmeyer, U.S. Geological Survey Publication_Date: 2003 Title: Geologic Structure Data in the Mount Trumbull 30' x 60' Quadrangle, Mohave and Coconino Counties, Northwestern Arizona Edition: Version 1.2 Geospatial_Data_Presentation_Form: vector digital data (Personal Geodatabase) Series_Information: Series_Name: U.S. Geological Survey Geologic Investigations Series Issue_Identification: Map I-2766 Publication_Information: Publication_Place: Flagstaff, Arizona Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/imap/i2766/ Description: Abstract: This digital database, a compilation of previous and new geologic mapping, contains geologic data used to produce the 100,000-scale Geologic Map of the Mount Trumbull 30' x 60' Quadrangle, Mohave and Coconino Counties, Northwestern Arizona. The geologic features that were mapped as part of this project include: geologic contacts and faults, bedrock and surficial geologic units, structural data, fold axes, karst features, mines, and volcanic features. This map was produced using 1:24,000-scale 1976 infrared aerial photographs followed by extensive field checking. Volcanic rocks were mapped as separate units when identified on aerial photographs as mappable and distinctly separate units associated with one or more pyroclastic cones and flows. Many of the Quaternary alluvial deposits that have similar lithology but different geomorphic characteristics were mapped almost entirely by photogeologic methods. Stratigraphic position and amount of erosional degradation were used to determine relative ages of alluvial deposits having similar lithologies. Each map unit and structure was investigated in detail in the field to ensure accuracy of description. Punch-registered mylar sheets were scanned at the Flagstaff Field Center using an Optronics 5040 raster scanner at a resolution of 50 microns (508 dpi). The scans were output in .rle format, converted to .rlc, and then converted to ARC/INFO grids. A tic file was created in geographic coordinates and projected into the base map projection (Polyconic) using a central meridian of -113.500. The tic file was used to transform the grid into Universal Transverse Mercator projection. The linework was vectorized using gridline. Scanned lines were edited interactively in ArcEdit. Polygons were attributed in ArcEdit and all artifacts and scanning errors visible at 1:100,000 were removed. Point data were digitized onscreen. Due to the discovery of digital and geologic errors on the original files, the ARC/INFO coverages were converted to a personal geodatabase and corrected in ArcMap. The feature classes which define the geologic units, lines and polygons, are topologically related and maintained in the geodatabase by a set of validation rules. The internal database structure and feature attributes were then modified to match other geologic map databases being created for the Grand Canyon region. Faults were edited with the downthrown block, if known, on the 'right side' of the line. The 'right' and 'left' sides of a line are determined from 'starting' at the line's 'from node' and moving to the line's end or 'to node'. Note: This metadata report provides an overview of the data content of this geodatabase. In addition, each feature class (except annotation feature classes) has a corresponding metadata report that should be referred to for additional Spatial Data Organization, Data Quality and Entity Attribute information. Version 1.2, March, 2014 - Minor edits were made to the geodatabase to correct geology and facilitate edgematch with adjacent USGS maps. - The database was upgraded from ArcGIS 9.3 to ArcGIS 10.2. - Changes made to the geodatabase are not reflected in the pamphlet or on map sheet PDFs. Purpose: This digital database was produced as part of a cooperative effort between the U.S. Geological Survey, the National Park Service, and the Bureau of Land Management to provide geologic information for visitor services and resource managment of Grand Canyon National Park, Lake Mead Recreational Area, and Grand Canyon Parashant National Monument, Arizona. Supplemental_Information: The structure of this Geodatabase and its associated feature classes, as well as the feature class naming conventions, loosely follows The National Park Service Geologic Resources Evaluation Geology-GIS Geodatabase Data Model (DRAFT, V. 1.2), which can be found at: http://science.nature.nps.gov/im/inventory/geology/GeologyGISDataModel.htm Feature classes: geologic contacts and faults (mtrglg_arc) geologic unit polygons (mtrglg_poly_100k) attitudes, joints, fault offsets, domes (mtratd) folds (mtrfld) karst features (mtrkar) mines (mtrmin) volcanic line features (mtrvlf) volcanic vents (mtrvpf) Annotation feature classes: geologic unit annotation (mtrglg_100kanno) dip and fault offset values (mtratd_100kanno) Relationship classes: mtratd_100kanno - links mtratd to mtratd_100kanno mtrglg_100kanno - links mtrglg_poly_100k to mtrglg_100kanno Related tables: list of 1:100,000-scale geologic map units (mtrlmu100k) Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2003 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -114.008529 East_Bounding_Coordinate: -112.997533 North_Bounding_Coordinate: 36.510859 South_Bounding_Coordinate: 35.984883 Keywords: Theme: Theme_Keyword_Thesaurus: none Theme_Keyword: geologic map Theme_Keyword: geology Theme_Keyword: geologic contacts Theme_Keyword: geologic faults Theme_Keyword: geologic units Theme_Keyword: fold axis Theme_Keyword: anticline Theme_Keyword: syncline Theme_Keyword: monocline Theme_Keyword: geologic structure data Theme_Keyword: attitudes Theme_Keyword: strikes and dips Theme_Keyword: joints Theme_Keyword: domes Theme_Keyword: karst Theme_Keyword: breccia pipe Theme_Keyword: collapse structure Theme_Keyword: sinkhole Theme_Keyword: mines Theme_Keyword: copper Theme_Keyword: uranium Theme_Keyword: volcanoes Theme_Keyword: basalt flow Theme_Keyword: volcanic vent Theme_Keyword: fault offset Place: Place_Keyword_Thesaurus: none Place_Keyword: Mount Trumbull Place_Keyword: Colorado Plateau Place_Keyword: Grand Canyon National Park Place_Keyword: Coconino County Place_Keyword: Mohave County Place_Keyword: Arizona Place_Keyword: USA Access_Constraints: None Use_Constraints: Not for use at scales greater than 1:100,000. Any derivative products utilizing these datasets shall clearly indicate their source. If users modify the data in any way they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these datasets, nor to imply that changes they made were approved by the U.S. Geological Survey. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: George H. Billingsley Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 2255 N. Gemini Dr. City: Flagstaff State_or_Province: AZ Postal_Code: 86001 Country: USA Contact_Voice_Telephone: 928-556-7198 Contact_Facsimile_Telephone: 928-556-7169 Contact_Electronic_Mail_Address: gbillingsley@usgs.gov Data_Set_Credit: This digital database was prepared by Sue Priest, Jessica Wellmeyer, Debra L. Block, and George Billingsley. Technical review was provided by Peter Huntoon, consulting geologist, Boulder City, NV and Jeremiah Workman and Charles Powell of the U.S. Geological Survey. Digital review was provided by Scott Graham and Tracey Felger of the U.S. Geological Survey. Prepared with the cooperation and support of Lake Mead National Recreation Area of the National Park Service and the Arizona Strip Field Office of the Bureau of Land Management. Native_Data_Set_Environment: ESRI ArcGIS 10.2, Personal Geodatabase Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Geologic features were identified, mapped, digitized, and attributed by the authors. The features were symbolized based on their attributes, plotted at 100,000-scale and compared visually with the original source maps. Logical_Consistency_Report: This database has been reviewed and is considered to be error-free. All features have attributes. Each line segment has a length and directionality that is appropriate for the geologic feature it depicts. No sliver polygons are present. Completeness_Report: This database is considered complete. All geologic features depicted on the source maps were digitized and attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Most of the geologic features in this database are considered to be accurately located and within +/- 5 meters of their actual location on the topographic base map. This accuracy diminishes in areas where the topography is either flat or very steep, or where the geologic feature of interest is difficult to discern. For example, contacts between surficial units are often difficult to discern and are considered to be approximately located despite being attributed as accurately located. The 1:24,000 topographic maps and corresponding Digital Raster Graphics (DRGs) that were used as the primary mapping base for this project were assumed to meet the National Map Accuracy Standard of +/- 12 meters. The scanned source maps, which were georeferenced to the DRG's, all had registration errors of less than +/- 12 meters and most had errors of less than +/- 5 meters. (Note: Refer to the metadata report for a specific feature class of interest for more detailed information about the positional accuracy of the features). Lineage: Process_Step: Process_Description: This map was produced using 1:24,000-scale 1976 infrared aerial photographs followed by extensive field checking. Volcanic rocks were mapped as separate units when identified on aerial photographs as mappable and distinctly separate units associated with one or more pyroclastic cones and flows. Many of the Quaternary alluvial deposits that have similar lithology but different geomorphic characteristics were mapped almost entirely by photogeologic methods. Stratigraphic position and amount of erosional degradation were used to determine relative ages of alluvial deposits having similar lithologies. Each map unit and structure was investigated in detail in the field to ensure accuracy of description. Process_Date: 1997-1999 Process_Step: Process_Description: Punch-registered mylar sheets were scanned at the Flagstaff Field Center using an Optronics 5040 raster scanner at a resolution of 50 microns (508 dpi). The scans were output in .rle format, converted to .rlc, and then converted to ARC/INFO grids. A tic file was created in geographic coordinates and projected into the base map projection (Polyconic) using a central meridian of -113.500. The tic file was used to transform the grid into Universal Transverse Mercator projection. Process_Date: 2001 Process_Step: Process_Description: The linework was vectorized using gridline. Scanned lines were edited interactively in ArcEdit. Polygons were attributed in ArcEdit and all artifacts and scanning errors visible at 1:100,000 were removed. Point data were digitized onscreen. Process_Date: 2001-2002 Process_Step: Process_Description: Due to the discovery of digital and geologic errors on the original files, the ARC/INFO coverages were converted to a personal geodatabase and corrected in ArcMap. The feature classes which define the geologic units, lines and polygons, are topologically related and maintained in the geodatabase by a set of validation rules. Process_Date: 2004 Process_Step: Process_Description: Modified the internal database structure and feature attributes to match other geologic map databases being created for the Grand Canyon region. Faults were edited with the downthrown block, if known, on the 'right side' of the line. The 'right' and 'left' sides of a line are determined from 'starting' at the line's 'from node' and moving to the line's end or 'to node'. Process_Date: 2006 Process_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan S. Priest Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 2255 N. Gemini Dr. City: Flagstaff State_or_Province: AZ Postal_Code: 86001 Country: USA Contact_Voice_Telephone: 928-556-7148 Contact_Facsimile_Telephone: 928-556-7169 Contact_Electronic_Mail_Address: spriest@usgs.gov Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 12 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -111.000000 Latitude_of_Projection_Origin: 0.000000 False_Easting: 500000.000000 False_Northing: 0.000000 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.000128 Ordinate_Resolution: 0.000128 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.400000 Denominator_of_Flattening_Ratio: 294.978698 Vertical_Coordinate_System_Definition: Altitude_System_Definition: Altitude_Resolution: 0.000010 Altitude_Encoding_Method: Explicit elevation coordinate included with horizontal coordinates Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: mtratd (Personal Geodatabase, Point Feature Class) Entity_Type_Definition: Geologic structure data (strikes, dips, joints, fault offset values, and domes). Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtratd_100kanno (Personal Geodatabase, Annotation Feature Class) Entity_Type_Definition: Geologic structure labels for display and plotting at 1:100,000-scale. Includes dip and fault offset values. Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrfld (Personal Geodatabase, Line Feature Class) Entity_Type_Definition: Fold axes (synclines, anticlines, and monoclines). Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrglg_100kanno (Personal Geodatabase, Annotation Feature Class) Entity_Type_Definition: Geologic unit labels for display and plotting at 1:100,000-scale. Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrglg_arc (Personal Geodatabase, Line Feature Class) Entity_Type_Definition: Geologic contacts and faults. Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrglg_poly_100k (Personal Geodatabase, Polygon Feature Class) Entity_Type_Definition: Geologic unit polygons (1:100,000-scale). Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrkar (Personal Geodatabase, Point Feature Class) Entity_Type_Definition: Karst features (collapse structures, breccia pipes and sinkholes) Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrmin (Personal Geodatabase, Point Feature Class) Entity_Type_Definition: Mines. Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrvlf (Personal Geodatabase, Line Feature Class) Entity_Type_Definition: Linear volcanic features (basalt flow direction arrows). Entity_Type_Definition_Source: User defined Detailed_Description: Entity_Type: Entity_Type_Label: mtrvpf (Personal Geodatabase, Point Feature Class) Entity_Type_Definition: Volcanic point features (vents). Entity_Type_Definition_Source: User defined Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: ask@usgs.gov Resource_Description: Downloadable Data Distribution_Liability: The U.S. Geological Survey (USGS) provides these geographic data "as is." The USGS makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. The USGS further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at the USGS, no warranty, expressed or implied, is made by the USGS regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall the USGS have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of delivery, installation, operation, or support by USGS. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ArcGIS Personal Geodatabase Format_Version_Number: 10.2 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/imap/i2766/ Fees: none Metadata_Reference_Information: Metadata_Date: 20061206 Metadata_Review_Date: 20061208 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Susan S. Priest Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 2255 N. Gemini Dr. City: Flagstaff State_or_Province: AZ Postal_Code: 86001 Country: USA Contact_Voice_Telephone: 928-556-7148 Contact_Facsimile_Telephone: 928-556-7169 Contact_Electronic_Mail_Address: spriest@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998 Metadata_Time_Convention: local time Metadata_Access_Constraints: none Metadata_Use_Constraints: none Metadata_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile