NMBGMR Draft Geologic Data Model - v. 0.992
LINES - Mapped Faults

revised: 20-Nov-2009

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
StrctClass StructClass 16 String CVD variable unknown FALSE unknown, fault, fault-scarp, fault zone, joint, jointset, fracture, fracture zone, breccia zone, shear zone, mylonite, ultramylonite, pseudotachylite, shear band Class of linear deformation structure.
FaultType " 16 String CVD fixed [null] TRUE [null], unknown, dip-slip, strike-slip, oblique-slip. Type of fault. Dip-slip includes: normal, reverse, thrust. Use oblique-slip when a SubSlipSense is specified
SlipSense " 16 String CVD fixed [null] TRUE [null], unspecified, unknown, normal, low-angle normal, reverse, thrust, dextral, sinestral, Right-side down 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 fixed [null] TRUE [null], unspecified, unknown, normal, low-angle normal, reverse, thrust, dextral, sinestral, Right-side down Subordinate slip sense (see above)
SlipBasis " 20 String CVD variable [null] TRUE unspecified, map pattern, minor faults, observed offset, slickenlines, geomorphic evidence, vegetation lineament, kinematic indicators, subsurface data, multiple criteria, etc. 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 Units of slip rate.
IDmethod   24 String CVD variable field evidence TRUE unspecified, field, aeromag, gravity, seismic, subsurface, analytical, etc. The basis for identification of this feature.
Confidence " 16 String CVD fixed certain TRUE unspecified, certain, probable, uncertain Confidence regarding the existence/identification and position of this feature.
Exposure " 16 String CVD fixed [null] TRUE unspecified, exposed, int-obscured, concealed Exposure of this feature at the surface.
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 fixed [null] TRUE [null] unspecified, km, meters, cm, mm, miles, feet, inches Units for seperation attributes
FltDipDir FaultDipDir 8 String CVD fixed [null] TRUE unknown, vertical, N,NE,E,SE,S,SW,W,NW General Dip direction of fault segment.
DipDirBsis DipDirBasis 25 String CVD fixed [null] TRUE [null] unspecified, measured, map pattern, younging, stratigraphic constraint Basis for determination of dip direction.
Ancestry " 36 String variable [null] TRUE Laramide reverse Ancestry of reactivated fault
LastActive " 36 String variable [null] TRUE Pleistocene most recent movement
DsplyScale DisplayScale   Long Integer CVD fixed 24000 FALSE 0, 24000, 50000, 12000, 6000, 100000, 250000,500000, 1000000 Denominator of display scale: display feature at scales larger than number specified (=< denominator). Zero indicates data that should never be displayed.
SourceID " 50 String variable [null] TRUE "Smith, 1999a" Feature level metadata (who mapped this)
Comments " 255 String variable [null] TRUE   Comments about this particular feature.