NMBGMR Draft Geologic Data Model - v. 0.992
POINTS: Fault Data

revised: 20-Nov-2009

Contents:

Feature Class: Fault_point

This feature class represents points of detailed data about faults, joints, and ductile shear zones. Foliation measurements outside of discrete shear zones with or without lineations and shear criteria probably should be stored in Geo_point. These features can be of any scale and may or may not be shown as mapped faults. Mapped faults are recorded as lines in Fault_line and, where measured, are topologically related to fault_point. Only the subset of point data representing mapped faults will lie on mapped fault lines and should have MappedFeat = 'yes', while exceptions to the topology rule should have MappedFeat ='no'. Some fault decorations, like bar-ball symbols, U & D symbols, fault teeth, etc are stored as point data in Fault_Symbol to allow better cartographic control.

Field Name Field Alias Length
(text fields)		 Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
StationID " 50 String variable [null]

y

 [null], to link to notes, photos, etc. Station ID (if specified)
MappedFeat MappedFeature   Short Integer binary 1 FALSE 1=yes/TRUE (on Fault_line)
0=no/FALSE (minor structure not on Fault_line)		 Is fault related to a mapped Fault_line?: Requires definintion query: if TRUE then this is a minor fault -- symbology changes (strike line is removed).
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 fault.
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 unknown, [all except joints]: normal, low-angle normal, reverse, thrust, dextral, sinestral, Right-side-down. Dominant slip sense. Right-side-down means the down-side is 90° clockwise of the strike azimuth.
SubSlipSns SubSlipSense 16 String CVD fixed [null] TRUE unknown, [all except joints]: normal, low-angle normal, reverse, thrust, dextral, sinestral, Right-side-down. Subordinate slip sense.
SlipBasis " 20 String CVD variable [null] TRUE unspecified, map pattern, minor faults, observed offset, slickenlines, geomorphic evidence, kinematic indicators, piercing line/point Basis for determination of dominant slip sense.
ShearCrit ShearCriteria 20 String CVD variable [null] TRUE unspecified, slickenlines, riedel shears, mineral fibers, offset marker, sigma porphyroclast, imbricate clasts, s-c fabric, [joint]: mode-[1,2,3], etc. Shear criteria.
SlipConfid SlipConfidence 20 String CVD fixed [null] TRUE unspecified, certain, probable, uncertain Confidence of slip determination
SlipRate "   Single variable [null] TRUE 10 Slip rate at this locality, details in comments below or linked to separate data table
SlipRateUn SlipRateUnits 16 String variable [null] TRUE mm/yr Units of slip rate
Inclnation Inclination 16 String CVD fixed inclined FALSE unspecified, unknown, inclined, vertical, horizontal Description of inclination; used to determine symbol type.
Strike "   Short Integer variable [null] TRUE [null], 256, 123, etc.
(0-360)		 Azimuth of strike (right hand rule).
DipDir DipDirection   Short Integer variable [null] TRUE [null], 166, 123, etc.
(0-360)		 Azimuth of dip-direction.
Dip "   Short Integer variable [null] TRUE [null], 45, 56, etc, (0-90) Value of dip.
FaultGen FaultGeneration 50 String variable [null] TRUE [null] unspecified, unknown, early, late, Laramide, Neogene, 1, 2, 3, 4, etc. Relative fault age based on meso/macroscopic relationships
FltSurface FaultSurface 20 String CVD variable [null] TRUE unspecified, unknown, gouge, slickensides, pseudotachylite, hackle marks, rib marks Type of surface measured.
Thickness "   Single variable [null] TRUE [thickness] Thickness of gouge/ fault zone.
ThickUnits " 8 String CVD fixed [null] TRUE meters, cm, mm, feet, inches Units of thickness.
FltLnType FaultLineType 16 String CVD fixed [null] TRUE slickenline, ext-lineation Type of linear fault fabric element.
FltLnSub FaultLineSubType 16 String CVD variable [null] TRUE unspecified,
Slickenlines: scratch-gouge, ridge-groove, slickenfibers
Extension lineations: L1, L2, L3, L4 etc. 		Subtype of linear fault fabric element of specified type.
Trend "   Short Integer range 0-360 [null] TRUE [null], 345 Trend of slickenlines.
Plunge "   Short Integer range 0-90 [null] TRUE [null], 45

Plunge of slickenlines.

Rake "   Short Integer range 0-180 [null] TRUE 45, 123; (0-180) Rake of slickenlines from strike azimuth (right-hand rule).
DipSeparat DipSeparation   Single variable [null] TRUE 34.3 Stratigraphic separation down dip.
StrikeSep StrikeSeparation   Single variable [null] TRUE 24.7 Stratigraphic separation along strike.
SepUnits SeparationUnits 16 String CVD fixed [null] TRUE [null] unspecified, km, meters, cm, mm, miles, feet, inches Units of separation.
MeasConfid MeasureConfidence 16 String CVD variable [null] TRUE unspecified, measured, compass sight, visual average, compiled, photo interp Confidence of measurement.
LocAccType LocAccuracyType 16 String variable [null] TRUE precision gps, handheld gps, good topo, poor topo, planimetric, survey Accuracy of position.
LocAccMeas LocAccuracyMeasure 16 String variable [null] TRUE EPE(m), PDOP, Map and compass, triangulation, distinctive feature Criteria for deterimining accuracy of position
LocAccVal LocAccuracyValue   Single variable [null] TRUE 15 Numeric measurement of locataion accuracy
DsplyScale DisplayScale   Long Integer CVD variable 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]   unknown; unspecified; Smith, 2006b [variable] Feature level metadata (who mapped this); related to bibliographic detail
Comments " 255 String variable [null] TRUE description Comments about this particular feature.

Feature Class: Fault_Symbol

This feature class stores fault annotation at a particular geographic location (does not include leaders, labels, etc). This feature class will be used for precise placement of fault annotation on fault_lines that has geologic meaning with respect to position. Annotation groups are preferable for fault names or other annotation whose position doesn't convey specific geologic meaning.

Field Name Field Alias Length
(text fields)		 Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
SymblClass SymbolClass 16 String CVD fixed ? FALSE [null], U, D, bar-ball, reverse teeth, thrust teeth, dextral, sinistral, text, query Class of symbol.
SymbolType " 16 String variable [null] TRUE [null], hollow, solid, etc. Type of symbol of specified class.
Queried "   Short Integer binary no FALSE 1=yes/TRUE, 0=no/FALSE Used to add a query "?" to a symbol.
RotaAngle RotationAngle 3 Short Integer variable [null] TRUE 45, 278 Symbol rotation angle.
SymbolText " 50 String variable [null] TRUE annotation text (reactivation history, etc) use when you need a text comment along a fault (set SymbolClass to 'text')
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.
Comments " 255 String variable [null] TRUE description Comments about this particular feature.