Geologic map of Alaska
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Metadata:
- Identification_Information:
-
- Citation:
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- Citation_Information:
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- 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: https://dx.doi.org/10.3133/sim3340
- Online_Linkage: https://pubs.usgs.gov/sim/3340
- Larger_Work_Citation:
-
- Citation_Information:
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- 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:
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- Series_Name: US Geological Survey Scientific Investigations Map
- Issue_Identification: SIM 3340
- Online_Linkage: https://dx.doi.org/10.3133/sim3340
- Online_Linkage: https://pubs.usgs.gov/sim/3340
- Description:
-
- Abstract:
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Digital compilation and reinterpretation of published and unpublished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published and unpublished, ranging from state and regional geologic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:
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- Single_Date/Time:
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- Calendar_Date: 2015
- Currentness_Reference: publication date
- Status:
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- 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:
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- Theme_Keyword_Thesaurus: None
- Theme_Keyword: geology
- Place:
-
- Place_Keyword_Thesaurus: None
- Place_Keyword: Alaska
- Access_Constraints: None
- Use_Constraints:
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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:
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- Contact_Organization_Primary:
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- Contact_Organization: U.S. Geological Survey, Alaska Science Center
- Contact_Person: Frederic H. Wilson
- Contact_Position: Research Geologist
- Contact_Address:
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- 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:
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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:
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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:
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- Planar:
-
- Map_Projection:
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- 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:
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- Entity_Type:
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- 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
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- 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
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- Attribute_Units_of_Measure: Ma, million years
- Attribute:
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- 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
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- 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:
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- Digital_Form:
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- Digital_Transfer_Information:
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- Format_Name: Vector Digital Data Set (Polygon)
- Digital_Transfer_Option:
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- Online_Option:
-
- Computer_Contact_Information:
-
- Network_Address:
-
- Network_Resource_Name: https://dx.doi.org/10.3133/sim3340
- Network_Resource_Name: https://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
Generated by mp version 2.9.32 on Mon Oct 26 17:23:18 2015