revised: 05-Feb-2015

NMBGMR Draft Geologic Data Model - v. 1.0.4
POINTS: Planar & Linear Fabrics

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.

Feature Class: Fabric_point

This feature class represents points of measured planar and/or linear geologic fabrics, such as attitudes of sedimentary bedding or foliations, but excludes fault plane / joint data and fold data (which are treated separately). Foliation measurements taken within discrete shear zones with good shear criteria should be recorded in Fault_point.

Field Name Field Alias Length
(text fields)
Field Type Field Value Default Allow Nulls? Attributes / Examples Description / Notes
FGDC_plane " 16 String variable [null] TRUE 30.3.12 FGDC geologic symbol reference number.
StationID " 50 String variable [null]


[null], to link to notes, photos, etc. Station ID (if specified)
RockType " 16 String CVD [null] TRUE sedimentary, volcanic, intrusive, metamorphic, unknown
see: RockType
Rock type: sedimentary, volcanic, magmatic foliation, or metamorphic foliation determines symbol set
PlaneType " 25 String CVDe [null] TRUE see: FabricPlaneType Type of planar fabric.
PlnSubType PlaneSubType 25 String CVD [null] TRUE contact, S0, S1, S2, etc.
see: FabricPlaneSubType
Sub-type of planar fabric of specified type.
Inclnation Inclination 16 String CVD [null] TRUE unspecified, inclined, vertical, horizontal, overturned Description of inclination; used to determine symbol type.
Surface " 50 String variable [null] TRUE unspecified, mudcracks, ripple marks, salt casts, trace fossils, geologic contact, etc. surface or plane properties
PlaneAsymm " 16 String variable [null] TRUE unspecified, fining-up, fining-down, sinsistral, dextral, S, Z, M, etc Asymmetry of planar fabric.
Strike "   Short integer Integer Range Domain: 0-359 [null] TRUE [null], 256, 123, etc.
Azimuth of strike (right hand rule).
DipDir DipDirection   Short integer Integer Range Domain: 0-359 [null] TRUE [null], 166, 123, etc.
Azimuth of dip-direction.
Dip "   Short integer Integer Range Domain: 0-90 [null] TRUE [null], 45, 56, etc, (0-90) Value of dip.
Younging " 16 String CVD [null] TRUE upright, overturned, etc.
see: Younging
Determination of younging "vector'.
YoungCrit YoungingCriteria 16 String CVD [null] TRUE see: YoungingCriteria Younging criteria used.
FGDC_line " 16 String CVD [null] TRUE 30.3.12 FGDC geologic symbol reference number.
LineType " 25 String CVD [null] TRUE [extension] lineation, paleocurrent, etc.
see: FabricLineType
Type of linear fabric.
LnSubType LineSubType 25 String CVD [null] TRUE L1, L2, L0-1 , L1-2 , imbrication, channel axis, etc.
see: FabricLineSubType
Subtype of linear fabric for specifed type.
Trend "   Short integer Integer Range Domain: 0-359 [null] TRUE [null], 166; (0-360) Azimuth of Trend.
Plunge "   Short integer Integer Range Domain: 0-90 [null] TRUE [null], 45 Value of plunge.
Rake "   Short integer Integer Range Domain: 0-180 [null] TRUE [null], 45 Value of rake measured from strike azimuth.
Magnitude "   Single variable [null] TRUE [null], 5 Magnitude of any vector data like # of paleocurrent measurements
LineAsymm LineAsymmetry 16 String CVD [null] TRUE see: LineAsymmetry Asymmetry of linear fabric; e.g. for Paleocurrents or dominant ductile shear sense.
SubLnAsym SubLineAsymmetry 16 String CVD [null] TRUE see: SubLineAsymmetry Subtype of linear fabric asymetry; e.g. tilt correction or subordinate shear sense.
AsymmCrit AsymmetryCriteria 50 String CVD [null] TRUE [sigma] porphyroclast, [delta] porphyroclast, etc.
see: AsymmetryCriteria
Critera for planar asymmetry.
MeasMethod MeasurementMethod 50 String CVD [null] TRUE see: MeasurementMethod Method of measurement.
LocAccType LocAccuracyType 50 String variable [null] TRUE precision gps, handheld gps, good topo, poor topo, planimetric, survey, map and compass, triangulation, distinctive feature Accuracy of position.
LocAccMeas LocAccuracyMeasure 16 String variable [null] TRUE EPE(m), PDOP Criteria for deterimining accuracy of position.
LocAccVal LocAccuracyValue   Single variable [null] TRUE 15 Numeric measurement of locataion accuracy.
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 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.