NMBGMR Draft Geologic Data Model - v. 1.0.3
LINES - Mapped Faults

revised: 29-Feb-2012

Fault_line

This feature class represents mapped faults, joints, and shear zones (measured fault orientations are in fault_point). Fault data such as measurements of fault planes and slickenlines are recorded as point data in fault_point which, for mapped faults, lie along these lines. Fault annotation can be handled by fault_point. Particularly good and/or important exposures of faults could be recorded as point data in Feature_point and assigned a special symbol along the fault. Node order for faults should be set such that the right side of the fault is down for every fault type (except purely strike-slip faults).

Field Name Field Alias Length
(text fields)		 Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_code " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
LineClass LineClass 50 String CVD [null] TRUE see: StructClass Class of linear deformation structure.
IDmethod " 50 String CVD [null] TRUE see: IDmethod The basis for identification of this feature.
Confidence " 16 String CVD [null] TRUE unspecified, certain, probable, uncertain

Confidence regarding the existence/identification of this feature.
Exposure " 16 String CVD [null] TRUE unspecified, exposed, obscured, concealed Exposure of this feature at the surface.
ShowMarker ShowMarkerSymbol   Short Integer boolean 1 (TRUE) FALSE 1=yes/TRUE (show line decoration)
0=no/FALSE (don't show)		 Toggle to show or not show line decoration (e.g. thrust teeth) for this line segment.
FaultType " 16 String CVD [null] TRUE [null], unknown, dip-slip, strike-slip, oblique-slip.
see: FaultType		 Type of fault. Dip-slip includes: normal, reverse, thrust. Use oblique-slip when a SubSlipSense is specified
SlipSense " 16 String CVD [null] TRUE see: SlipSense Dominant slip sense; "right side" down is the convention for every type (only specified when FaultType is unknown) -- node order may need to be flipped to set this correctly.
SubSlipSns SubSlipSense 16 String CVD [null] TRUE see: SlipSense Subordinate slip sense (see above)
SlipBasis " 128 String CVD [null] TRUE see: SlipBasis Basis for determination of dominant slip sense. Elaborate in comments if necessary.
SlipRate "   Single variable [null] TRUE 10 Slip rate on fault segment. Details in topologically related point data or in separate data table. Negative 1 = NULL which is not allowed.
SlipUnits " 20 String variable [null] TRUE mm/yr, etc. Units of slip rate.
Name " 50 String variable [null] TRUE Pecos-Picuris Fault Feature name (will likely be NULL for most features)
DipSeparat DipSeparation   Single variable [null] TRUE 34.3 Stratigraphic separation down dip. Negative 1 = NULL which is not allowed.
StrikeSep StrikeSeparation   Single variable [null] TRUE 24.7 Stratigraphic separation along strike. Negative 1 = NULL which is not allowed.
SepUnits SeparationUnits 16 String CVD
LengthUnits		 [null] TRUE [null], unspecified, km, meters, etc.
see:LengthUnits		 Units for seperation attributes
FltDipDir FaultDipDir 8 String CVD [null] TRUE unknown, vertical, N,NE,E,SE,S,SW,W,NW General Dip direction of fault segment.
DipDirBsis DipDirBasis 128 String CVD [null] TRUE see: FaultDipDirBasis Basis for determination of dip direction.
Ancestry " 128 String variable [null] TRUE Laramide reverse Ancestry of reactivated fault
LastActive " 128 String variable [null] TRUE Pleistocene most recent movement
DsplyScale DisplayScale   Long Integer CVD 24000 TRUE see: DisplayScale Denominator of display scale: display feature at scales larger than number specified (=< denominator). Zero indicates data that should never be displayed.
SourceID " 128 String variable [null] TRUE "Smith, 1999a" Feature level metadata (who mapped this)
Comments " 255 String variable [null] TRUE   Comments about this particular feature.