Metadata: Identification_Information: Citation: Citation_Information: Originator: Frederic H. Wilson Originator: Keith Labay Originator: Nora Shew Originator: Chad P. Hults Publication_Date: 2015 Title: Geologic map of Alaska Geospatial_Data_Presentation_Form: Vector Digital Data Set (Polygon) Online_Linkage: http://dx.doi.org/10.3133/sim3340 Online_Linkage: http://pubs.usgs.gov/sim/3340 Larger_Work_Citation: Citation_Information: Originator: Frederic H. Wilson Originator: Chad P. Hults Originator: Charles G. Mull Originator: Susan M. Karl Publication_Date: 2015 Title: Geologic map of Alaska Edition: 1.0 Geospatial_Data_Presentation_Form: Vector Digital Data Set Series_Information: Series_Name: US Geological Survey Scientific Investigations Map Issue_Identification: SIM 3340 Online_Linkage: http://dx.doi.org/10.3133/sim3340 Online_Linkage: http://pubs.usgs.gov/sim/3340 Description: Abstract: Digital compilation and reinterpretation of published and unpublished geologic mapping of Alaska. Purpose: This data set represents part of a systematic effort to release geologic map data for the United States in a uniform manner. Geologic data in this data set has been compiled from a wide variety of sources, published and unpublished, ranging from state and regional geologic map to field mapping. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2015 Currentness_Reference: publication date Status: Progress: In work Maintenance_and_Update_Frequency: Unknown Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: 172.0 East_Bounding_Coordinate: -130.0 North_Bounding_Coordinate: 72.0 South_Bounding_Coordinate: 51.2 Keywords: Theme: Theme_Keyword_Thesaurus: None Theme_Keyword: geology Place: Place_Keyword_Thesaurus: None Place_Keyword: Alaska Access_Constraints: None Use_Constraints: None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Alaska Science Center Contact_Person: Frederic H. Wilson Contact_Position: Research Geologist Contact_Address: Address_Type: mailing address Address: 4210 University Drive City: Anchorage State_or_Province: AK Postal_Code: 99508-4626 Country: US Contact_Voice_Telephone: 907-786-7448 Contact_Electronic_Mail_Address: fwilson@usgs.gov Native_Data_Set_Environment: Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.2 (Build 3552) Service Pack [N/A] (Build [N/A]) Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Many types of source materials of varying scales were used to compile this data set. Sources include previously published maps, unpublished mapping, and air photo interpretation, and reflects more than a century of work in Alaska. Vector features were mostly digitized either by digitizing on screen or on a large format digitizing tablet. Vectors and polygons were attributed and checked. Topology rules were checked. Logical_Consistency_Report: The geologic data consists of attributed arcs and polygons. Each polygon has a coded attribute designating the mapped geologic unit. Faults, stratigraphic contacts, dikes, lineations and other linear features are represented as arcs. When a fault is also a stratigraphic contact, only a single arc is present. Dangling arcs may be present (fault, dike, lineation, etc.). Completeness_Report: The data set AKStategeol.gdb consists of arc, polygon, and point features depicting the geology of Alaska in both detailed and generalized versions. The detailed state map geologic units are described in the Description of Map Units (DMU) found in the accompanying pamphlet. The features for the generalized version were derived from the detailed features; the generalized version is used for the printed version of the state map. A separate metadata file is provided for the generalized version. The AKStategeol.gdb also includes many tables which contain additional information and can be linked to either the arc or polygon features. The information in the tables were derived from a set of related Filemaker databases which contain additional information. The native Filemaker database files and a stand-alone Filemaker_Runtime file, along with CSV and DBF files are provided with this publication. The features in AKStategeol.gdb are also provided as shapefiles. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Data is presented for use at a nominal scale of 1:250,000. Vertical_Positional_Accuracy: Vertical_Positional_Accuracy_Report: not applicable. Lineage: Process_Step: Process_Description: The geology for each of the 153 1:250,000 scale quadrangles in Alaska was compiled from many different sources. Data capture has been ongoing since 1995. Linework was hand digitized from materials of various media and scale. The arcs and polygons were attributed, and topology was checked. Data is archived as ARC/Info coverages. Process_Date: Unknown Process_Step: Process_Description: The geology data from the 153 quadrangle coverages were combined to create the detailed map feature classes in AKStatewidegeol.gdb Process_Date: 2015 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Point_and_Vector_Object_Information: SDTS_Terms_Description: SDTS_Point_and_Vector_Object_Type: G-polygon Point_and_Vector_Object_Count: 245562 Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: NAD 1983 Alaska Albers (ESRI Full Name: NAD_1983_Alaska_Albers) Albers_Conical_Equal_Area: Standard_Parallel: 55.0 Standard_Parallel: 65.0 Longitude_of_Central_Meridian: -154.0 Latitude_of_Projection_Origin: 50.0 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 0.6096 Ordinate_Resolution: 0.6096 Planar_Distance_Units: Meter Geodetic_Model: Horizontal_Datum_Name: D_North_American_1983 Ellipsoid_Name: GRS_1980 Semi-major_Axis: 6378137.0 Denominator_of_Flattening_Ratio: 298.257222101 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Type_Label: AKStategeol_poly Entity_Type_Definition: Characteristics of the geologic unit are coded in the polygon attribute table. The table includes the following items: CLASS, QCLASS, SOURCE, NSACLASS, NSASUB, NSAMOD, SOURCECLASS, STATE_SYMBOL, STATE_LABEL, STATE_LABEL2, STATE_UNITNAME, AGE_RANGE, and SEQUENCE. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: CLASS Attribute_Definition: Unique numeric code assigned to a geologic unit from an original source map. Number is unique only within a given quadrangle and specific to SOURCE. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsaunits (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: QCLASS Attribute_Definition: Subdivision of attribute NSACLASS providing more detailed Quaternary classification. Field QCLASS is a key field for linking to field QCLASS in table nsaqkey. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsaunits (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; uses the 2-letter quadrangle code and a three digit number. By default, 001 is reserved for the topographic map or other source of hydrologic spatial data for each quadrangle. Field SOURCE is a key field and links to SOURCE in table nsarefs. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsarefs (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar geologic units. Field NSACLASS is a key field and links to field NSACLASS in tables nsaage, nsakey, nsalith, nsarefs, and nsasetting. NSACLASS is also a 1:many relationship with NSACLASS in table nsaunits. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsakey (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: NSASUB Attribute_Definition: Same coding as NSACLASS, but used to define the bedrock unit beneath surficial deposits. Not universally populated. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsakey (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: NSAMOD Attribute_Definition: Indicates if a geologic unit is altered, contact metamorphosed, or has a queried unit assignment. Some maps show contact metamorphosed areas as separate units; these units are assigned a NSACLASS for the appropriate protolith and have 'HFS' selected as NSAMOD value. If only a few polygons of a geologic unit are altered or contact metamorphosed, then the NSAMOD value is set for those polygons only. Queried units, Tk? versus Tk for example, have the same NSACLASS, but Tk? will have NSAMOD = 'Q'. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: {Null Value / Empty Field Entry} Enumerated_Domain_Value_Definition: Unit is not altered, contact metamorphosed, or queried. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT Enumerated_Domain_Value_Definition: Hydrothermally altered, nonspecific Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT, Q Enumerated_Domain_Value_Definition: Hydrothermally altered, nonspecific, and queried(?) Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT-SER Enumerated_Domain_Value_Definition: Sericitic alteration Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HFS Enumerated_Domain_Value_Definition: Contact metamorphism, nonspecific Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HFS, Q Enumerated_Domain_Value_Definition: Contact metamorphism, nonspecific, and queried Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Q Enumerated_Domain_Value_Definition: Queried (?) geologic unit Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: SOURCECLASS Attribute_Definition: Concatenated field that uniquely identifies a given source map (SOURCE) and geologic unit (CLASS). Field SOURCECLASS is a key field that links to field SOURCE_CLASS in table nsaunits. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsaunits (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: STATE_SYMBOL Attribute_Definition: Number defining symbol color in WPGCMYKG.style for ArcGIS to display the detailed digital geologic map in AKStategeol.mxd. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 992 Attribute: Attribute_Label: STATE_LABEL Attribute_Definition: Same as STATE_LABEL2 but uses special characters for using FGDCGeoAge font to display the symbols for geologic time periods. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: } represents Mesozoic; ^ Triassic; | Paleozoic; * Pennsylvanian; _ Cambrian; = preCambrian; and < Proterozoic. Attribute: Attribute_Label: STATE_LABEL2 Attribute_Definition: Geologic unit label used in the Description of Map Units and detailed version of the state map. Label is in standard text font and does not use special characters. Px is used for Proterozoic and IP for Pennsylvanian. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: gen_state_link (provided as Filemaker database, Filemaker runtime, CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: STATE_UNITNAME Attribute_Definition: Unit name as used in the Description of Map Units Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: gen_state_link (provided as Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: AGE_RANGE Attribute_Definition: Age range of the map unit in the Description of Map Units, does not necessarily match the units on the printed generalized map. The combining of DMU units for the generalized map may have created longer time intervals for the units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Describes the geologic age interval of the geologic unit as used in the Description of Map Units (DMU). Information obtained from gen_state_link (provided as Filemaker databse, Filemaker runtime, and CSV and DBF files) Attribute: Attribute_Label: SEQUENCE Attribute_Definition: A sorting code using a letter for lithologic type and then a number. Used to place the unit in age order. Matches the order given in the Description of Map Units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: A is unconsolidated units; B is sedimentary rocks; C is volcanic rocks; D is plutonic rocks, E is metamorphic rocks, and F is tectonic units or assemblages. Detailed_Description: Entity_Type: Entity_Type_Label: AKStategeol_arc Entity_Type_Definition: Characteristics of linear features, which include various types of faults, stratigraphic contacts, and other line types. Lineations and dikes are stored in separate feature classes, but contain similar attributes. Items in AKStategeol_arc include the following items: ARC_CODE, ARC_PARA1, SOURCE, LINEID, LINE_TYPE, LEFT_LABEL, and RIGHT_LABEL. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: ARC_CODE Attribute_Definition: ARC_CODE is a positive integer value in the arc attribute table. Values range discontinuously from 0 to 99. Values match one-for-one with LINE_TYPE. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 1 Enumerated_Domain_Value_Definition: Stratigraphic contact; location certain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 2 Enumerated_Domain_Value_Definition: Stratigraphic contact; location approximate Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 3 Enumerated_Domain_Value_Definition: Stratigraphic contact; inferred; queried Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 4 Enumerated_Domain_Value_Definition: Normal fault; location certain; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 5 Enumerated_Domain_Value_Definition: Normal fault; location approximate; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 6 Enumerated_Domain_Value_Definition: Normal fault; location inferred, queried; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 7 Enumerated_Domain_Value_Definition: Shoreline or riverbank; arc-para1 = 1 designates single-sided stream, typically used in areas of braiding Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 8 Enumerated_Domain_Value_Definition: Internal contact or phase change in the source map. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 9 Enumerated_Domain_Value_Definition: Boundary of altered zone or hornfels Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 10 Enumerated_Domain_Value_Definition: Thrust fault; location certain; teeth on right from origin. ARC_PARA1 is dip of the fault plane, if known. A negative number indicates overturned fault. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 11 Enumerated_Domain_Value_Definition: Thrust fault; location approximate; teeth on right from origin. ARC_PARA1 is dip of the fault plane, if known. A negative number indicates overturned fault. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 12 Enumerated_Domain_Value_Definition: Thrust fault; location inferred, queried; teeth on right from origin Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 13 Enumerated_Domain_Value_Definition: Moraine or till margin (scour) on bedrock Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 14 Enumerated_Domain_Value_Definition: Caldera or crater rim Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 15 Enumerated_Domain_Value_Definition: Ice contact (glacier limit) Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 18 Enumerated_Domain_Value_Definition: Internal contact Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 19 Enumerated_Domain_Value_Definition: Moraine limit having tics on right side from origin. ARC_PARA1 = 1 indicates the moraine is submerged. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 28 Enumerated_Domain_Value_Definition: Caldera or crater rim, inferred or concealed Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 30 Enumerated_Domain_Value_Definition: Fault with unknown offset; location certain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 31 Enumerated_Domain_Value_Definition: Fault with unknown offset; location approximate Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 32 Enumerated_Domain_Value_Definition: Fault with unknown offset; location inferred Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 34 Enumerated_Domain_Value_Definition: Terrace, erosional, or wave-cut scarp; digitize with water on right from origin Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 35 Enumerated_Domain_Value_Definition: High-angle reverse fault; certain location; teeth on right from origin; arc-para1 is angle of thrusting, if known Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 36 Enumerated_Domain_Value_Definition: High-angle reverse fault; certain approximate; teeth on right from origin; arc-para1 is angle of thrusting, if known Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 37 Enumerated_Domain_Value_Definition: High-angle reverse fault; certain inferred; teeth on right from origin; arc-para1 is angle of thrusting, if known Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 48 Enumerated_Domain_Value_Definition: Moraine crest Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 50 Enumerated_Domain_Value_Definition: Dikes and sills (used in feature class AKStategeol_dike) Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 51 Enumerated_Domain_Value_Definition: Concealed contact Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 52 Enumerated_Domain_Value_Definition: Concealed normal fault; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 53 Enumerated_Domain_Value_Definition: Concealed thrust fault; teeth on right from origin. ARC_PARA1 is dip of the fault plane, if known. A negative number indicates overturned fault. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 54 Enumerated_Domain_Value_Definition: Concealed high-angle reverse fault Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 55 Enumerated_Domain_Value_Definition: Concealed normal fault having right lateral oblique slip Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 56 Enumerated_Domain_Value_Definition: Concealed normal fault having left lateral oblique slip Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 57 Enumerated_Domain_Value_Definition: Concealed right lateral fault Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 58 Enumerated_Domain_Value_Definition: Concealed left lateral fault Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 59 Enumerated_Domain_Value_Definition: Concealed shear zone Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 60 Enumerated_Domain_Value_Definition: Concealed fault with unknown offset Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 71 Enumerated_Domain_Value_Definition: Normal fault; location certain; having right lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 72 Enumerated_Domain_Value_Definition: Normal fault; location approximate; having right lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 73 Enumerated_Domain_Value_Definition: Normal fault; location certain; having left lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 74 Enumerated_Domain_Value_Definition: Normal fault; location approximate; having left lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 75 Enumerated_Domain_Value_Definition: Normal fault; location inferred or queried; having left lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 76 Enumerated_Domain_Value_Definition: Normal fault; location inferred or queried; having right lateral oblique slip; if arc-para1 = 1, then upthrown side is on right-hand side Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 87 Enumerated_Domain_Value_Definition: Right lateral fault; location certain Enumerated_Domain_Value_Definition_Source: this data Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 88 Enumerated_Domain_Value_Definition: Right lateral fault; location approximate Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 89 Enumerated_Domain_Value_Definition: Right lateral fault; location inferred, queried Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 90 Enumerated_Domain_Value_Definition: Left lateral fault; location certain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 91 Enumerated_Domain_Value_Definition: Left lateral fault; location approximate Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 92 Enumerated_Domain_Value_Definition: Left lateral fault; location inferred, queried Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 94 Enumerated_Domain_Value_Definition: Shear zone, location certain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 96 Enumerated_Domain_Value_Definition: Shear zone; location inferred Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 97 Enumerated_Domain_Value_Definition: Scratch line used where polygon on source map was not closed, or limit of mapping Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 98 Enumerated_Domain_Value_Definition: International border Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 99 Enumerated_Domain_Value_Definition: Bounding neat line of 1:250,000 scale quadrangle Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: ARC_PARA1 Attribute_Definition: Used as a modifier for ARC_CODE Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: See ARC_CODE attribute definitions for ARC_PARA1 definition Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; uses the 2-letter quadrangle code and a three digit number. By default, 001 is reserved for the topographic map or other source of hydrologic spatial data for each quadrangle. Field SOURCE is a key field for linking to field SOURCE in table nsarefs. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsarefs (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: LINEID Attribute_Definition: LINEID provides additional attributes for some faults and glacial moraines. For faults, LINEID identifies the fault system the feature belongs to. For moraines, LINEID identifies the moraine or glacial limit. LINEID is an 8 character alpha-numeric code following this naming convention. The first letter is 'f' if the feature is a fault, or 'm' if a moraine. The second and third characters are alpha abbreviations for the fault system, region, or glaciation. These abbreviations are defined below. The final 4 numbers in LINEID are identifiers which further subdivide the line's description. Field LINEID is a key field for linking to field LINEID in table LINEID. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fBR Enumerated_Domain_Value_Definition: Border Ranges fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fCH Enumerated_Domain_Value_Definition: faults in the Chugach Mountains region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fCS Enumerated_Domain_Value_Definition: Coast Mountains orogen Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fDE Enumerated_Domain_Value_Definition: Denali fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fFW Enumerated_Domain_Value_Definition: Fairweather-Chugach-Ragged Mountain fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fKB Enumerated_Domain_Value_Definition: Kobuk fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fKG Enumerated_Domain_Value_Definition: Kugruk Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fKT Enumerated_Domain_Value_Definition: Kaltag fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fLA Enumerated_Domain_Value_Definition: Laurentia region, Kandik River area of Alaska Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fLG Enumerated_Domain_Value_Definition: Livengood region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fNA Enumerated_Domain_Value_Definition: Brooks Range region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fTC Enumerated_Domain_Value_Definition: Tikchik-Susitna region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fTI Enumerated_Domain_Value_Definition: Tintina fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fTK Enumerated_Domain_Value_Definition: Talkeetna suture zone Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fWR Enumerated_Domain_Value_Definition: Wrangellia region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fYA Enumerated_Domain_Value_Definition: faults in the Yakutat block region, south of the Fairweather-Chugach-Ragged Mountain fault system Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fYK Enumerated_Domain_Value_Definition: Yukon-Kuskokwim region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: fYT Enumerated_Domain_Value_Definition: Yukon-Tanana region Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: hide Enumerated_Domain_Value_Definition: used for symbolizing small scale maps; identifies faults not to be drawn in areas of high density Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: hide2 Enumerated_Domain_Value_Definition: same as 'hide' but feature to be drawn as ARC_CODE = 2 if map is to show contacts. Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: mLW Enumerated_Domain_Value_Definition: Late Wisconsin glaciation Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: LEFT_LABEL Attribute_Definition: Geologic unit on the left side of the line feature. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: See polygon attribute STATE_LABEL2. Attribute: Attribute_Label: RIGHT_LABEL Attribute_Definition: Geologic unit on the right side of the line feature. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: See polygon attribute STATE_LABEL2. Attribute: Attribute_Label: LINE_TYPE Attribute_Definition: Descriptive name for ARC_CODE Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Brief description of ARC_CODE Detailed_Description: Entity_Type: Entity_Type_Label: AKStategeol_dike Entity_Type_Definition: Line features representing dikes and sills Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: ARC_CODE Attribute_Definition: same as attribute ARC_CODE in AKStategeol_arc feature class Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 50 Enumerated_Domain_Value_Definition: Dikes and sills Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; uses the 2-letter quadrangle code and a three digit number. Same as attribute SOURCE in AKStategeol_arc and AKStategeol_poly. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsarefs (available as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: CLASS Attribute_Definition: Unique numeric code assigned to a geologic unit from the original source map. Number is unique only within a given quadrangle and specific to SOURCE. Not universally populated. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsaunits (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar units. Not universally populated. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsakey (provided as a geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: LINE_TYPE Attribute_Definition: Descriptive name for ARC_CODE Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Dikes and sills Detailed_Description: Entity_Type: Entity_Type_Label: AKStategeol_lineament Entity_Type_Definition: Line features representing lineaments Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: ARC_CODE Attribute_Definition: same as attribute ARC_CODE in AKStategeol_arc feature class Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: All lineaments have ARC_CODE = 93 Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; uses the 2-letter quadrangle code and a three digit number. Same as attribute SOURCE in AKStategeol_arc and AKStategeol_poly. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsarefs (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: LINE_TYPE Attribute_Definition: Descriptive name for ARC_CODE Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Lineament Detailed_Description: Entity_Type: Entity_Type_Label: lineid Entity_Type_Definition: lineid is a table in AKStategeol.gdb containing additional information about some faults and moraines. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: LINEID Attribute_Definition: LINEID provides additional attributes for some faults and moraines. LINEID is the keyfield for linking to AKStategeol_arc. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Describes fault system or region this feature is found. See description of LINEID for AKStategeol_arc. Attribute: Attribute_Label: LINE_NAME Attribute_Definition: Descriptive name of fault system, region, or moraine Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Descriptive name of fault system, region, or moraine Detailed_Description: Entity_Type: Entity_Type_Label: nsaage Entity_Type_Definition: Table containing geologic age information for each unique NSACLASS value. Provides composite maximum and minimum age assignments for a given NSACLASS. A modified version of International Union of Geological Sciences (IUGS) International Chronostratigraphic Chart or radiometric dating were used to determine age attributes. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: NSACLASS Attribute_Definition: key field to link to AKStategeol_poly Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsakey (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: MIN_MA Attribute_Definition: Minimum age in millions of years, determined either from IUGS or radiometric dating. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1600 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: MAX_MA Attribute_Definition: Maximum age in millions of years, determined either from IUGS or radiometric dating. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0117 Range_Domain_Maximum: 2500 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: TYPE Attribute_Definition: Defines whether the age assignment is relative, if based on stratigraphic position, or absolute, if based on radiometric dating. The default value is 'Relative'. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Absolute Enumerated_Domain_Value_Definition: Age assignment is based on radiometric dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Relative Enumerated_Domain_Value_Definition: Age assignment is based on stratigraphic position. Default value. Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: AGE_COM Attribute_Definition: Age_comments Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Free text Attribute: Attribute_Label: MIN_EON Attribute_Definition: The minimum or youngest age assignment for the eon of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MIN_ERA Attribute_Definition: The minimum or youngest age assignment for the era of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MIN_PERIOD Attribute_Definition: The minimum or youngest age assignment for the period of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MIN_EPOCH Attribute_Definition: The minimum or youngest age assignment for the epoch of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MIN_AGE Attribute_Definition: The minimum or youngest age assignment for the age of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MAX_EON Attribute_Definition: The maximum or oldest age assignment for the eon of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MAX_ERA Attribute_Definition: The maximum or oldest age assignment for the era of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MAX_PERIOD Attribute_Definition: The maximum or oldest age assignment for the period of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MAX_EPOCH Attribute_Definition: The maximum or oldest age assignment for the epoch of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: MAX_AGE Attribute_Definition: The maximum or oldest age assignment for the age of the unit, based on geologic interpretation. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: FULL_MIN Attribute_Definition: Concatenation of fields MIN_EON, MIN_ERA, MIN_PERIOD, MIN_EPOCH, and MIN_AGE. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: CMIN_AGE Attribute_Definition: The most precise minimum age coded; derived from FULL_MIN field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: FULL_MAX Attribute_Definition: Concatenation of fields MAX_EON, MAX_ERA, MAX_PERIOD, MAX_EPOCH, and MAX_AGE. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Attribute: Attribute_Label: CMAX_AGE Attribute_Definition: The most precise maximum age coded; derived from FULL_MAX field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: International Chronostratigraphic Chart Codeset_Source: IUGS Detailed_Description: Entity_Type: Entity_Type_Label: nsakey Entity_Type_Definition: Table containing labels and colors applied to the map. The table also includes a brief description of the geologic unit. Key field is NSACLASS. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: REC_NO Attribute_Definition: unique numeric identifier Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1461 Attribute: Attribute_Label: SYMBOL Attribute_Definition: Symbol number for wpgcmykg.style; used for symbolizing polygons for the detailed state geologic map; based on NSACLASS Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 995 Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 90 Range_Domain_Maximum: 20000 Attribute: Attribute_Label: LABEL Attribute_Definition: Map labels used for regional maps, which may be different from the generalized and/or detailed state maps. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: Brief summary of the regional geologic unit, which may be different from the generalized and/or detailed state maps. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Detailed_Description: Entity_Type: Entity_Type_Label: nsalith Entity_Type_Definition: Table containing the lithologic coding for each regional geologic unit. Geologic units are comprised of more than one rock type, therefore lithology to NSACLASS is a many-to-one relationship. Each lithology is described in a 5 tiered hierarchy and is given a rank based on abundance. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: RECORD_NO Attribute_Definition: unique numeric identifier Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 4027 Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar geologic units. Key field to link to AKStategeol_poly. Attribute_Definition_Source: this data source Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 99 Range_Domain_Maximum: 12950 Attribute: Attribute_Label: LITH1 Attribute_Definition: Highest level lithologic classification. Text field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: LITH2 Attribute_Definition: Second level lithologic classification. LITH2 is based on value of LITH1. Text field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: LITH3 Attribute_Definition: Third level lithologic classification. LITH3 is based on value of LITH2. Text field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: LITH4 Attribute_Definition: Fourth level lithologic classification. LITH4 is based on value of LITH3. Text field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: LITH5 Attribute_Definition: Fifth level lithologic classification. LITH5 is based on value of LITH4. Text field. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: TOTALLITH Attribute_Definition: Concatenation of LITH1, LITH2, LITH3, LITH4, and LITH5. This field allows for searches on any level of the lithologic hierarchy. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: LOWEST Attribute_Definition: Copy of the lith field with the most specific part of the lithologic assignment. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithologic data dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 1 Attribute: Attribute_Label: FORM Attribute_Definition: Description of lithologic form. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: Lithform Data Dictionary Codeset_Source: GUIDE_TO_DIGITAL_DATABASE_FILES_(readme), Appendix 2 Attribute: Attribute_Label: RANK Attribute_Definition: Indicates how much of the geologic map unit this lithology represents. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Major Enumerated_Domain_Value_Definition: Greater than or equal to 33 percent Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Minor Enumerated_Domain_Value_Definition: between 10 and 33 percent Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Incidental Enumerated_Domain_Value_Definition: less than 10 percent Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Indeterminate (major) Enumerated_Domain_Value_Definition: Abundance of this lithology is not defined. The term 'major' is part of the attribute to insure inclusive searches for major rock types, as rock types listed in the indeterminate category could be a major component of a geologic map unit. These may be eliminated from search results by explicitly omitting 'Indeterminate' from the query results. Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: PERCENT Attribute_Definition: Optional field containing an estimate of percentage of the unit that this lithology represents. This information is rarely available in Alaska. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 5 Range_Domain_Maximum: 100 Attribute: Attribute_Label: LITH_COMMENT Attribute_Definition: comment field Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free form text Detailed_Description: Entity_Type: Entity_Type_Label: NSAQKEY Entity_Type_Definition: Similar to NSAKEY except it subdivides the Quaternary surficial deposits by assigning color symbols and labels to the Quaternary units. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: SYMBOL Attribute_Definition: Symbol number for wpgcmykg.style; used for symbolizing polygons based on Quaternary units, QCLASS Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 974 Attribute: Attribute_Label: QCLASS Attribute_Definition: Subdivision of attribute NSACLASS providing more detailed Quaternary units. Key field linking to AKStategeol_poly. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsaunits (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar geologic units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Codeset_Domain: Codeset_Name: nsakey (provided as geodatabase table, Filemaker database, Filemaker runtime, and CSV and DBF files) Codeset_Source: this data set Attribute: Attribute_Label: UNIT_LABEL Attribute_Definition: Geologic unit label for statewide Quaternary map Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Quaternary surficial map unit label. Attribute: Attribute_Label: GEOLOGIC_UNIT Attribute_Definition: Brief description of the surficial map unit Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Detailed_Description: Entity_Type: Entity_Type_Label: NSAREFS Entity_Type_Definition: Reference citation for source map and/or other publication used to build AKStategeol data set. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: REFNUM Attribute_Definition: unique numeric identifier Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1272 Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; uses the 2-letter 1:250,000 scale quadrangle code and a three digit number. By default, 001 is reserved for the topographic map or other source of hydrologic spatial data for each quadrangle. If a source map extends into multiple quadrangles, it has been assigned a source code for each quadrangle covered. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Unique code assigned to each source that uses the two letter 1:250,000 scale quadrangle code and a three digit number. Attribute: Attribute_Label: REFERENCE Attribute_Definition: Reference citation Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Reference citation written in USGS style. Detailed_Description: Entity_Type: Entity_Type_Label: NSASETTING Entity_Type_Definition: Geologic setting for each unique NSACLASS value Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to similar geologic units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 98 Range_Domain_Maximum: 20000 Attribute: Attribute_Label: SETTING Attribute_Definition: Description of geologic setting for each unique NSACLASS. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Detailed_Description: Entity_Type: Entity_Type_Label: NSAUNITS Entity_Type_Definition: Table derived from the central database, NSAUNITS. Contains brief abstracts of the unit descriptions from each SOURCE map, which have been classified into regional and statewide units. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: QUADRANGLE Attribute_Definition: Name of 1:250,000 scale quadrangle. The name of the Mount McKinley 1:250,000 scale quadrangle was changed to Denali in September 2015. The records for this area are duplicated as both Mount McKinley(MM) and Denali(DN). Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: MAP_UNIT Attribute_Definition: Geologic unit label from the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: UNIT_NAME Attribute_Definition: Map unit name from the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: AGE Attribute_Definition: Geologic age of the unit as given on the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: DESCRIPTION Attribute_Definition: Abstracted version of the unit description from the SOURCE map. Focus on lithology and important relationships as described on the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: ROCK_CLASS Attribute_Definition: General classification of geologic unit. For mixed units, the dominant category is given. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Igneous, sedimentary, metamorphic, unconsolidated, or melange. For mixed units, the dominant category is given. Attribute: Attribute_Label: FOSSIL Attribute_Definition: Brief notes on any fossil control mentioned on the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: RADIOMETRIC_AGE Attribute_Definition: Brief notes on radiometric ages mentioned on the SOURCE map. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: SOURCE Attribute_Definition: Unique code assigned to each source; used the 2-letter code for 1:250,000 scale quadrangles, and a three digit number. By default, 001 is used for the topographic map or other source of hydrologic spatial data for each quadrangle. Numbers above 100 indicate sources that were not captured digitally. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: CLASS Attribute_Definition: Unique numeric code assigned to each geologic unit on a SOURCE map. Unique only within a given quadrangle and specific to each SOURCE. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 55240 Attribute: Attribute_Label: SOURCE_CLASS Attribute_Definition: Concatenation of fields SOURCE and CLASS. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: NSACLASS Attribute_Definition: Regional numeric code assigned to like geologic units. Link to many of the other databases or tables. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 90 Range_Domain_Maximum: 12950 Attribute: Attribute_Label: NSAMOD Attribute_Definition: Indicates if geologic unit is altered, contact metamorphosed, or has a queried unit assignment. Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT Enumerated_Domain_Value_Definition: Hydrothermally altered, nonspecific Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT-BIO Enumerated_Domain_Value_Definition: Biotite alteration Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT-POT Enumerated_Domain_Value_Definition: Potassic alteration Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ALT-SER Enumerated_Domain_Value_Definition: Sericitic alteration Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: HFS Enumerated_Domain_Value_Definition: Contact metamorphism, nonspecific Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Q Enumerated_Domain_Value_Definition: Queried (?) geologic unit Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: QCLASS Attribute_Definition: Regional numeric code assigned to similar surficial units. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 4900 Attribute: Attribute_Label: NSASUB Attribute_Definition: Used to define the bedrock unit (NSACLASS) underlying surficial deposits. Not universally populated. Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 8626 Detailed_Description: Entity_Type: Entity_Type_Label: radiometric_ages Entity_Type_Definition: Point feature class with radiometric age data for samples analyzed by K/Ar, 40Ar/39Ar, Rb/Sr, fission-track, and other methods, excluding U/Pb determinations. Created from Radiometric database, which is provided as a Filemaker database, Filemaker runtime, and DBF and CSV files. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: REC_NO Attribute_Definition: Unique numeric identifier for this data set Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 6108 Attribute: Attribute_Label: SAMPLE Attribute_Definition: Sample number/identifier Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: QUAD Attribute_Definition: Name of 1:250,000 scale quadrangle Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude given in decimal degrees, NAD27 Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 50.266667 Range_Domain_Maximum: 70.953333 Attribute_Units_of_Measure: degree Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude given in decimal degrees, NAD27 Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -179.127 Range_Domain_Maximum: 179.433333 Attribute_Units_of_Measure: degree Attribute: Attribute_Label: ROCK_TYPE Attribute_Definition: Rock type of sample dated Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: MINERAL Attribute_Definition: Mineral or phase dated Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: METHOD Attribute_Definition: Dating method used Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 Enumerated_Domain_Value_Definition: Argon-argon dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 Average Enumerated_Domain_Value_Definition: Average of multiple 40Ar/39Ar ages Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 High temp. frac. Enumerated_Domain_Value_Definition: 40Ar/39Ar high temperature fraction Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 Isochron Enumerated_Domain_Value_Definition: 40Ar/39Ar isochron age Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 Plateau Enumerated_Domain_Value_Definition: 40Ar/39Ar plateau age Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: 40/39 Total Fusion Enumerated_Domain_Value_Definition: 40Ar/39Ar total fusion age Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Fission-track Enumerated_Domain_Value_Definition: Fission track dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: K/Ar Enumerated_Domain_Value_Definition: Potassium-argon dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Lu/Hf Enumerated_Domain_Value_Definition: Lutetium-hafnium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Pb-alpha Enumerated_Domain_Value_Definition: Lead-alpha dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Rb/Sr Enumerated_Domain_Value_Definition: Rubidium-strontium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Re/Os Enumerated_Domain_Value_Definition: Rhenium-osmium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: Sm/Nd Enumerated_Domain_Value_Definition: Samarium-neodymium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: U-Th/He Enumerated_Domain_Value_Definition: Uranium-thorium / helium dating; uranium-helium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: COMMENT Attribute_Definition: Comments about the sample or analysis. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: REFERENCE Attribute_Definition: Reference citations for the age determination Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: AGE Attribute_Definition: Reported age in millions of years Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -30.5 Range_Domain_Maximum: 3258 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: ERROR Attribute_Definition: Analytical error for the age calculation, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 1300 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: PLATEAU_AGE Attribute_Definition: 40Ar/39Ar plateau age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.0103 Range_Domain_Maximum: 832.5 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: PLATEAU_ERROR Attribute_Definition: Analytical error for the 40Ar/39Ar plateau age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0008 Range_Domain_Maximum: 21.8 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: ISOCHRON_AGE Attribute_Definition: 40Ar/39Ar isochron age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.019 Range_Domain_Maximum: 196.6 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: ISOCHRON_ERROR Attribute_Definition: Analytical error for the 40Ar/39Ar isochron age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0015 Range_Domain_Maximum: 62.6 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: FUSION_AGE Attribute_Definition: 40Ar/39Ar total fusion age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -0.038 Range_Domain_Maximum: 1352.4 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: FUSION_ERROR Attribute_Definition: Analytical error for the 40Ar/39Ar total fusion age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.001 Range_Domain_Maximum: 129.8 Attribute_Units_of_Measure: Ma, million years Detailed_Description: Entity_Type: Entity_Type_Label: u_pb_ages Entity_Type_Definition: Point feature class of U-Pb age data for samples analyzed by uranium-lead methods. Created from u-pb database, which is provided as a Filemaker database, Filemaker runtime, and DBF and CSV files. Entity_Type_Definition_Source: this data set Attribute: Attribute_Label: REC_NO Attribute_Definition: unique numeric identifier for this data table Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 1389 Attribute: Attribute_Label: SAMPLE Attribute_Definition: Sample number/identifier Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: QUAD Attribute_Definition: Name of 1:250,000 scale quadrangle Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude given in decimal degrees, NAD27 Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 51.376667 Range_Domain_Maximum: 68.37 Attribute_Units_of_Measure: degree Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude given in decimal degrees, NAD27 Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -174.696667 Range_Domain_Maximum: 179.375 Attribute_Units_of_Measure: degree Attribute: Attribute_Label: ROCK_TYPE Attribute_Definition: Rock type of sample dated Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: MINERAL Attribute_Definition: Mineral or phase dated Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: METHOD Attribute_Definition: Dating method used Attribute_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: ICPMS Enumerated_Domain_Value_Definition: Inductively coupled plasma-mass spectrometry Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: SHRIMP Enumerated_Domain_Value_Definition: Sensitive high resolution ion microprobe Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TIMS Enumerated_Domain_Value_Definition: Thermal ionization mass spectrometry Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TIMS-multigrain Enumerated_Domain_Value_Definition: Thermal ionization mass spectrometry multi-grain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: TIMS-singlegrain Enumerated_Domain_Value_Definition: Thermal ionization mass spectrometry single grain Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: U/Th Enumerated_Domain_Value_Definition: Uranium-thorium dating Enumerated_Domain_Value_Definition_Source: this data set Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: U/Pb Enumerated_Domain_Value_Definition: Uranium-lead dating Enumerated_Domain_Value_Definition_Source: this data set Attribute: Attribute_Label: COMMENT Attribute_Definition: Comments about the sample or analysis. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: REFERENCE Attribute_Definition: Reference citations for the age determination Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: PREFERRED_AGE Attribute_Definition: Interpreted best age based on the data; reported in millions of years Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0051 Range_Domain_Maximum: 2108 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: ERROR Attribute_Definition: Analytical error for the preferred age, if reported Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0 Range_Domain_Maximum: 725 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: SIGMA Attribute_Definition: Number of standard deviations of reported analytical error Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: Either 1 or 2 standard deviations Attribute: Attribute_Label: AGE_TYPE Attribute_Definition: Additional description of the interpreted age or sample. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: AGE_EVENT Attribute_Definition: Additional description of the interpreted age. Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: free text Attribute: Attribute_Label: F206PB_238U Attribute_Definition: 206Pb/238U age Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.0051 Range_Domain_Maximum: 1977 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F206PB_238U_ERROR Attribute_Definition: 206Pb/238U age error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.06 Range_Domain_Maximum: 20 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F207PB_235U Attribute_Definition: 207Pb/235U age Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 28.9 Range_Domain_Maximum: 2054 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F207PB_235U_ERROR Attribute_Definition: 207Pb/235U age error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.1 Range_Domain_Maximum: 20 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F207PB_206PB Attribute_Definition: 207Pb/206Pb age Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 15 Range_Domain_Maximum: 2258 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F207PB_206PB_ERROR Attribute_Definition: 207Pb/206Pb age error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 399 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F208PB_232TH Attribute_Definition: 208Pb/232Th age Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 3 Range_Domain_Maximum: 2408 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F208PB_232TH_ERROR Attribute_Definition: 208Pb/232Th age error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 6 Range_Domain_Maximum: 12 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F206PB_204PB Attribute_Definition: 206Pb/204Pb age Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 21.5 Range_Domain_Maximum: 6115 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: F206PB_204PB_ERROR Attribute_Definition: 206Pb/204Pb age error Attribute_Definition_Source: this data set Attribute_Domain_Values: Unrepresentable_Domain: field is empty Attribute: Attribute_Label: UPPER_INTERCEPT Attribute_Definition: Upper concordia intercept Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 70 Range_Domain_Maximum: 2450 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: UPPER_ERROR Attribute_Definition: Upper concordia intercept error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1 Range_Domain_Maximum: 470 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: LOWER_INTERCEPT Attribute_Definition: Lower concordia intercept Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -304 Range_Domain_Maximum: 1371 Attribute_Units_of_Measure: Ma, million years Attribute: Attribute_Label: LOWER_ERROR Attribute_Definition: Lower concordia intercept error Attribute_Definition_Source: this data set Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.8 Range_Domain_Maximum: 699 Attribute_Units_of_Measure: Ma, million years Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: Mailing Address: MS902 Box 25286 Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225 Country: U.S.A. Contact_Voice_Telephone: 1-888-ASK-USGS Distribution_Liability: This publication was prepared by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, product, or process disclosed in this report, or represents that its use would not infringe privately owned rights. Reference therein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or any agency thereof. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: Vector Digital Data Set (Polygon) Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://dx.doi.org/10.3133/sim3340 Network_Resource_Name: http://pubs.usgs.gov/sim/3340 Fees: None. No fees are applicable for obtaining the data set. Metadata_Reference_Information: Metadata_Date: 20151026 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey, Alaska Region Contact_Person: Nora B. Shew Contact_Position: Geologist Contact_Address: Address_Type: mailing address Address: 4210 University Drive City: Anchorage State_or_Province: AK Postal_Code: 99508-4626 Country: US Contact_Voice_Telephone: 907-786-7445 Contact_Facsimile_Telephone: 907-786-7401 Contact_Electronic_Mail_Address: nshew@usgs.gov Metadata_Standard_Name: FGDC Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998