revised: 05-Feb-2015

NMBGMR Draft Geologic Data Model - v. 1.0.4
LINES - Mapped Faults

In the interests of standardization and interoperability, we are migrating our geologic maps into the USGS NCGMP09 data model. However, our well data model is still actively being used. Documentation for the NMBGMR geology data model is being provided for users with legacy data in this model. We also hope that it will provoke discussion in the ongoing effort to improve NCGMP09 and other models.


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
[null] TRUE [null], unspecified, km, meters, etc.
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.