Identification_Information: Citation: Citation_Information: Originator: V.E. Langenheim Originator: R.C. Jachens Publication_Date: 2014 Title: Magnetic data, processing, and maps of Fort Irwin and vicinity, southern California Geospatial_Data_Presentation_Form: point digital data Series_Information: Series_Name: Open-File Report Issue_Identification: 2013-1024–I Publication_Information: Publication_Place: Menlo Park, CA Publisher: U.S. Geological Survey Online Linkage: http://pubs.usgs.gov/of/2013/1024/i/ Description: Abstract: Helicopter magnetic data of the Leach Basin area, aeromagnetic data for the Soda Lake region, magnetic gradients, a grid of the detailed aeromagnetic data, and magnetic susceptibility data for Fort Irwin and vicinity, southern California Digital Files: The database includes an ASCII file containing point magnetic data from the Leach Basin helicopter survey, an ASCII file containing point magnetic data from the Soda Lake aeromagnetic survey, a grid of detailed aeromagnetic data from the Fort Irwin region, two ASCII files with point locations of the local maximum horizontal gradient derived from the magnetic grid, and one of magnetic susceptibility data. This metadata file describes the magnetic susceptibility measurements. Purpose: Magnetic map identifies magnetic features as a basis for geophysical interpretations. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -117.276 East_Bounding_Coordinate: -116.040 North_Bounding_Coordinate: 35.907 South_Bounding_Coordinate: 34.726 Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Victoria E Langenheim Contact_Organization: USGS WR GD Contact_Address: Address_Type: mailing address Address: 345 Middlefield Road Mail Stop 989 City: Menlo Park State_or_Province: CA Postal_Code: 94025 Country: USA Contact_Voice_Telephone: 650-329-5313 Contact_Facsimile_Telephone: 650-329-5133 Contact_Electronic_Mail_Address: zulanger@usgs.gov Keywords: Theme: Theme_Keyword: magnetics Theme_Keyword: magnetic anomaly Theme_Keyword: magnetic susceptibility Theme_Keyword: remanent magnetization Place: Place_Keyword: southern California Place_Keyword: Mojave Desert Place_Keyword: Fort Irwin Access_Constraints: none Use_Constraints: none Data_Quality_Information: Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Accuracy of the point data is roughly 40 m, as well as the data can be located on a 1:24,000-scale topographic map Overview_Description: Entity_and_Attribute_Overview: The data file is in ASCII format. The data define point data with information as follows: Sample name Latitude in decimal degrees (NAD27) Longitude in decimal degrees (NAD27) Susceptibility in 10-3 cgs units Susceptibility in 10-3 SI units Rock Type Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: susc_120711.txt Attribute: Attribute_Label: sample name Attribute_Definition: name given to sample Attribute: Attribute_Label: lon_nad27 Attribute_Definition: longitude coordinate Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 250 m Attribute: Attribute_Label: lat_nad27 Attribute_Definition: latitude coordinate Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 250 m Attribute: Attribute_Label: magnetic susceptibility 10-3 cgs Attribute_Definition: magnetic susceptibility Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 10-5 cgs Attribute: Attribute_Label: magnetic susceptibility, 10-3 SI Attribute_Definition: magnetic susceptibility Attribute_Value_Accuracy_Information: Attribute_Value_Accuracy: 10-5 SI Metadata_Reference_Information: Metadata_Date: 20120711 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Victoria Langenheim Contact_Organization: U.S. Geological Survey Contact_Position: geophysicist Contact_Address: Address_Type: mailing and physical address Address: 345 Middlefield Rd. City: Menlo Park State_or_Province: CA Postal_Code: 94025 Contact_Voice_Telephone: 650-329-5313 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