Identification_Information: Citation: Citation_Information: Originator: U.S. Geological Survey Publication_Date: Unknown Title: Preliminary Surficial Geologic Map Database of the Amboy 30x60 Minute Quadrangle, California Edition: 1.0 Geospatial_Data_Presentation_Form: vector digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2006-1165 Description: Abstract: The surficial geologic map database of the Amboy 30x60 minute quadrangle presents characteristics and physical properties of surficial materials for an area approximately 5,000 km2 in the eastern Mojave Desert of California at a scale of 1:100,000. This map consists of new surficial mapping conducted between 2000 and 2005 in the area, as well as compilations of previous bedrock mapping simplified to emphasize lithologic source material. Surficial geology units are mapped and described based on depositional process and age categories that reflect the mode of deposition, pedogenic effects occurring post-deposition, and, where appropriate, the lithologic nature of the material. The physical properties recorded in the database focus on those that drive hydrologic, biologic, and physical processes such as particle size distribution (PSD) and bulk density. This version of the database is distributed with point data, representing locations of both laboratory determined physical properties and semi-quantitative field-based information. Future publications will include the complete field and lab data, as well as maps of distributed physical properties across the landscape tied to physical process models where appropriate. The database is distributed in 3 parts: spatial map-based data, documentation, and printable map graphics of the database. Spatial data is distributed as an Arc/Info coverage in ESRI interchange (e00) format, or as tabular data in the form of a DBF-file (DBF) file. Documentation includes this file, which provides a discussion of the surficial geology and describes the format and content of the map data. The documentation also includes FGDC metadata for the spatial map information. Map graphics files are distributed as Postscript and Adobe Portable Document Format (PDF) files, and are appropriate for representing a view of the spatial database at the mapped scale. Purpose: Describe the surficial materials in the mapped area Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2006 Currentness_Reference: ground condition Status: Progress: In work Maintenance_and_Update_Frequency: As needed Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -116.0 East_Bounding_Coordinate: -115.0 North_Bounding_Coordinate: 35.0 South_Bounding_Coordinate: 34.5 Keywords: Theme: Theme_Keyword_Thesaurus: This Report Theme_Keyword: Mojave Desert Theme_Keyword: Surficial Geology Access_Constraints: None Use_Constraints: Acknowledgement of the U.S. Geological Survey; uses of this digital geologic map should not violate the spatial resolution of the data. Although the digital form of the data removes the constraint imposed by the scale of a paper map, the detail and accuracy inherent in map scale are also present in the digital data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David R. Bedford Contact_Organization: U.S. Geological Survey Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd MS973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4924 Contact_Facsimile_Telephone: 650-329-4936 Contact_Electronic_Mail_Address: dbedford@usgs.gov Browse_Graphic: Browse_Graphic_File_Name: amb_browse.jpg Browse_Graphic_File_Description: Small browse graphic of the Amboy 1:100,000 scale quadrangle Browse_Graphic_File_Type: JPEG Native_Data_Set_Environment: Microsoft Windows 2000 Version 5.1 (Build 2600) Service Pack 2; ESRI ArcCatalog 8.2.0.700 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: map units, contacts, or faults are attributed with an appended '?' if their designation is assumed and not definite. Logical_Consistency_Report: Geologic lines attributed as a 'contact' do not separate geologic map units of the same type, and are not considered as 'dangles'. All geologic polygons are attributed with map unit designators found in the Description of Map Units Completeness_Report: Complete for publication standards Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Accuracy of line locations is carried in the database and displayed by different line symbols (solid vs. dashed lines) in the cartographic display. For the purpose of this database, solid lines represent contacts and faults located with an accuracy greater than 10 m and commonly greater than 5 m. Dashed lines represent two kinds of less certainly located features, each distinguished in the database: 1) contacts and faults located with an accuracy of 10 to 15 m, 2) contacts that represent gradational boundaries between adjacent units. Gradational contacts represent interleaving of sediments and smooth gradations in characteristics such as percentage of eolian sand. In general, these gradations take place over distances of 50 to 150 m. Lineage: Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Complete chain Point_and_Vector_Object_Count: 9972 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Label point Point_and_Vector_Object_Count: 3805 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains Point_and_Vector_Object_Count: 3805 SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: Point Point_and_Vector_Object_Count: 4 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 11 Transverse_Mercator: Scale_Factor_at_Central_Meridian: 0.999600 Longitude_of_Central_Meridian: -117.000000 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: 0.000860 Ordinate_Resolution: 0.000860 Planar_Distance_Units: meters Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1983 Ellipsoid_Name: Geodetic Reference System 80 Semi-major_Axis: 6378137.000000 Denominator_of_Flattening_Ratio: 298.257222 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: amb-geo.aat Entity_Type_Definition: Arc attributes for coverage 'amb_geo' (Faults, depositional contacts, and rock units) Entity_Type_Definition_Source: This Report Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: FNODE# Attribute_Definition: Internal node number for the beginning of an arc (from-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: TNODE# Attribute_Definition: Internal node number for the end of an arc (to-node). Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LPOLY# Attribute_Definition: Internal node number for the left polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: RPOLY# Attribute_Definition: Internal node number for the right polygon. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Whole numbers that are automatically generated. Attribute: Attribute_Label: LENGTH Attribute_Definition: Length of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: AMB-GEO# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: AMB-GEO-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: LTYPE Attribute_Definition: Geologic Line types (e.g. contact, fault) Attribute_Definition_Source: This Report Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: contact, approximately located Enumerated_Domain_Value_Definition: Boundary between two mapped units that has been observed but the location is not precise Enumerated_Domain_Value_Definition_Source: This Report Enumerated_Domain: Enumerated_Domain_Value: contact, certain Enumerated_Domain_Value_Definition: Boundary between two mapped units that was observed, the location of which is well known Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: contact, eolian gradational Enumerated_Domain_Value_Definition: Boundary between two mapped units that is transitional in properties between the mapped units through eolian processes, the location of which is approximate and may vary with in the direction of eolian transport Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: contact, gradational Enumerated_Domain_Value_Definition: Boundary between two mapped units that is transitional over an area. Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: fault, approximately located Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. Locational accuracy is approximate, Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: fault, certain Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. Locational accuracy is well located Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: fault, concealed Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The fault is obscured by overlying map units, so it is not well-located Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: fault, concealed, queried Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The fault is obscured by overlying map units, so it is not well-located Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: fault, queried Enumerated_Domain_Value_Definition: Structural boundary between mapped units or structural discontinuity within a mapped unit that has experienced relative offset. The fault is obscured by overlying map units or has not been visited in the field, so its existence and location is not well-known Enumerated_Domain_Value_Definition_Source: This report Enumerated_Domain: Enumerated_Domain_Value: map boundary Enumerated_Domain_Value_Definition: Edge of mapped area, used to bound polygons at the edge of the map database. Enumerated_Domain_Value_Definition_Source: This report Detailed_Description: Entity_Type: Entity_Type_Label: amb-geo.pat Entity_Type_Definition: Polygon attributes for coverage 'amb_geo' (Faults, depositional contacts, and rock units) Entity_Type_Definition_Source: This Report Attribute: Attribute_Label: FID Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: Shape Attribute_Definition: Feature geometry. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Coordinates defining the features. Attribute: Attribute_Label: AREA Attribute_Definition: Area of feature in internal units squared. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: PERIMETER Attribute_Definition: Perimeter of feature in internal units. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Positive real numbers that are automatically generated. Attribute: Attribute_Label: AMB-GEO# Attribute_Definition: Internal feature number. Attribute_Definition_Source: ESRI Attribute_Domain_Values: Unrepresentable_Domain: Sequential unique whole numbers that are automatically generated. Attribute: Attribute_Label: AMB-GEO-ID Attribute_Definition: User-defined feature number. Attribute_Definition_Source: ESRI Attribute: Attribute_Label: PTYPE Attribute_Definition: Geologic polygon (map unit) designation Attribute_Definition_Source: This report Attribute_Domain_Values: Unrepresentable_Domain: Unique values of this field are presented in the associated text Detailed_Description: Entity_Type: Entity_Type_Label: amb_field.dbf Entity_Type_Definition: Locations, map unit types, and nature of other observations for the map area Entity_Type_Definition_Source: This report, map units may represent those found in Bedford, 2003, and others (see map text) Attribute: Attribute_Label: UTM_E Attribute_Definition: UTM (NAD83 Zone 11N) easting (X) coordinate Attribute_Definition_Source: This report Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: handheld GPS Attribute: Attribute_Label: UTM_N Attribute_Definition: UTM (NAD83 Zone 11N) northing(Y) coordinate Attribute_Definition_Source: This report Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: Handheld GPS Attribute: Attribute_Label: Date Attribute_Definition: Date of observation Attribute_Definition_Source: This report Attribute: Attribute_Label: StationID Attribute_Definition: Text of the Author's station identification corresponding to notes Attribute_Definition_Source: This Report Attribute: Attribute_Label: Last_Name Attribute_Definition: The last name of the Authors making the observation Attribute_Definition_Source: This report Attribute: Attribute_Label: map_unit Attribute_Definition: The Author's free-form map unit (i.e. ptype in the geologic map) which may not correspond to exact map units in the 1:100,000 scale map classification Attribute_Definition_Source: This report Attribute: Attribute_Label: BD_Moist Attribute_Definition: Boolean (Y or N) for presence or absence of a Bulk Density/Field Moisture determination Attribute_Definition_Source: This Report Attribute: Attribute_Label: Chronology Attribute_Definition: Boolean (Y or N) for presence or absence of a geochronology sample Attribute_Definition_Source: This report Attribute: Attribute_Label: Lithology Attribute_Definition: Boolean (Y or N) for presence or absence of a parent lithology determination(s) Attribute_Definition_Source: This report Attribute: Attribute_Label: PSA Attribute_Definition: Boolean (Y or N) for presence or absence of a particle size analysis (texture) sample Attribute_Definition_Source: This report Attribute: Attribute_Label: Photos Attribute_Definition: Boolean (Y or N) for presence or absence of digital photograph(s) Attribute_Definition_Source: This report Attribute: Attribute_Label: Surface_desc Attribute_Definition: Boolean (Y or N) for presence or absence of surface description (e.g. clast size, lichen, eolian processes) Attribute_Definition_Source: This Report Attribute: Attribute_Label: Vegetation Attribute_Definition: Boolean (Y or N) for presence or absence of vegetation measurements Attribute_Definition_Source: This report Overview_Description: Entity_and_Attribute_Overview: Geologic polygon (map unit) types are stored in the Ptype field of the polgyon layer for coverage amb_geo Geologic line types (e.g. contact, fault) are stored in the Ltype field of the arc layer for coverage amb_geo Entity_and_Attribute_Detail_Citation: This report Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U. S. Geological Survey Contact_Person: USGS Information Services Contact_Address: Address_Type: mailing address Address: Box 25286 Denver Federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: 1-888-ASK-USGS Contact_Electronic_Mail_Address: infoservices@usgs.gov Resource_Description: This Open-File Report consists of three digital packages. The first is the Documentation Package, which consists of this file in text and Adobe Portable Document Format (PDF), a Portable Document Format (PDF) file of the geologic map and an accompanying geologic pamphlet (which includes a more detailed description of map units), FGDC metadata for the Report, and possibly a revision list. The second is Digital Database Package, which contains the geologic map database itself, and metadata. The third is the Plot file Package, which contains an on-screen viewable or printable image of the geologic map created from the database in PostScript and PDF formats. For those interested in the geology of the map area that do not use an ARC/INFO-compatible (Environmental Systems Research Institute, www.esri.com) Geographic Information System (GIS), we have provided two sets of plot files containing images of much of the information in the database. There is a plot file image in Adobe Acrobat PDF (http://www.adobe.com/) format (see Plot file Package sections below). Those who have computer capability can access the plot file packages in any of the three ways described below (see the section Obtaining the Digital Database and Plot file Packages). However, the plot file packages do require zip utilities to access the plot files. Therefore, additional software, available free on the Internet, may be required to use the plot files (see Zip files section). Those without computer capability can obtain plots from an outside vendor (see section Obtaining plots from an outside vendor). Note: filenames used in this report are based on combinations of the Open-File Report number, followed by an underscore, followed by the number of the package, followed by an alphabetic character denoting the part of that package, followed by a ".", and a three or four digit file extension. For example, for a text file of the metadata part of the documentation package (package number 1) in Open-File Report OF99_999 (a fictitious report number) would have a file name of of099_999_1a.txt Documentation Package The Documentation Package includes descriptions of this report, including instructions on how to get the report, data formats and content. It consists of 3 parts, a text description (this file), FGDC compliant metadata describing the report, and a revision list that lists any revisions made to this report. The documentation package contains the following: of06-1165_1a.txt a text file of the report text (this file) of06-1165_1a.pdf a PDF file of the report text (this file) of06-1165_1b.txt a text file of the geologic description pamphlet of06-1165_1b.pdf a PDF file of the geologic description pamphlet of06-1165_1c.txt a text file of FGDC compliant metadata for this report of06-1165_1d.html a HTML file of FGDC compliant metadata for this report of06-1165_1e.html a HTML 'FAQ' file of FGDC compliant metadata for this report Digital Database Package The database package includes geologic map database files for the map area. The digital maps, or coverages, along with their associated database directory have been converted to uncompressed ARC/INFO export files for distribution. ARC export files promote ease of data handling, and are usable by some Geographic Information Systems in addition to ARC/INFO (see below for a discussion of working with export files). Additionally, ARC export files are files that contain both the spatial and associated database information, so that it is possible to read and interpret the files and write simple code to convert the files to a format more convenient to the user, should no such code be available off-the-shelf. The ARC export files and associated ARC/INFO coverages, and directories, as well as the additional digital material included in the database, are described below: of06-1165_2a.e00 Faults, depositional contacts, and rock units in the quadrangle of06-1165_2b.dbf A DBF table of field observations The database package (of05-1165_3.zip) also includes the following files: of06-1165_1b.txt a text file of FGDC compliant metadata for this Report import.aml an ARC/INFO Arc Macro Language file for importing the above coverage Converting ARC export files ARC export files are converted to ARC coverages using the ARC command IMPORT with the option COVER. To ease conversion and maintain naming conventions, we have included an ASCII text file in ARC Macro Language that will convert all of the export files in the database into coverages and create the associated INFO directory. With the Workspace set to the directory containing the Arc Export files, from the ARC command line type: Arc: &run import.aml ARC export files can also be read by some other Geographic Information Systems. Please consult your GIS documentation to see if you can use ARC export files and the procedure to import them. Note: consult the metadata or the Database Specifics section of this Report for details of the format and content of the digital database Plotfile Package For those interested in the geology of the map area whom don't use an ARC/INFO compatible GIS system, we have included a separate data package of printable maps created from the database. Because this release is primarily a digital database, the plot files (and plots derived from) have not been edited to conform to U.S. Geological Survey standards. Small units have not been labeled with leaders and in some instances map features or annotation overlap. The map image is 29 by 64 inches and requires a large plotter to produce paper copies at the intended scale. of06-1165_3a.eps A PostScript format file containing an image of the geologic map, at a scale of 1:100,000. of06-1165_3a.pdf A PDF format file containing an image of the geologic map, at a scale of 1:100,000. Distribution_Liability: Use of the database beyond the intended map scale (1:100,000) is not recommended. This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. This database 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. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Transfer_Size: 4.484 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/of/2006/1165 Ordering_Instructions: Obtaining the Digital Database and Plotfile Packages The digital data can be obtained in any of three ways: a. From the USGS Web Pages. b. Anonymous ftp over the Internet c. Sending a CDR with request To obtain tar files of database or plot file packages from the USGS web pages: The U.S. Geological Survey web site is located at: http://www.usgs.gov/ Publications of the U.S. Geological Survey can be found at http://pubs.usgs.gov/ The direct URL to the web page for this report is: http://pubs.usgs.gov/of/2006/1165/ The primary World Wide Web server for geologic publications of the U.S. Geological Survey in the Western Region is the "Geopubs" server, located at the following URL: http://geopubs.wr.usgs.gov The direct URL to the web page for this Report is: http://geopubs.wr.usgs.gov/open-file/of06-1165/ To obtain tar files of database or plot file packages by ftp: The files in these reports are stored on the U.S. Geological Survey Western Region Publications FTP server. The Internet ftp address of this server is: ftp://geopubs.wr.usgs.gov The user should log in with the user name anonymous and then input their e-mail address as the password. This will give the user access to all the publications available via ftp from this server. The files in this report are stored in the subdirectory: pub/open-file/of06-1165 To obtain tar files of database or plot file packages on tape or CDROM: Database files, PostScript plot files, and related files can be obtained by sending a recordable compact disk (CDR) or blank tape with request and return address to: Amboy 30x60, California Database c/o Database Coordinator U.S. Geological Survey 345 Middlefield Road, M/S 973 Menlo Park, CA 94025 Do not omit any part of this address! NOTE: Be sure to include with your request the exact names, as listed above, of the tar files you require. An Open-File Report number is not sufficient, unless you are requesting both the database package and plot file package for the report. Metadata_Reference_Information: Metadata_Date: 20060630 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: David R. Bedford Contact_Position: Geologist Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd MS973 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-4924 Contact_Facsimile_Telephone: 650-329-4936 Contact_Electronic_Mail_Address: dbedford@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_Extensions: Online_Linkage: http://www.esri.com/metadata/esriprof80.html Profile_Name: ESRI Metadata Profile