revised: 05-Feb-2015

NMBGMR Draft Geologic Data Model - v. 1.0.4
SYMBOLOGY: Fold Point Features

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 document indicates how standard features portrayed on a geologic map should be coded in the data model. See the NMBGMR Symbol set (3.7 Mb PDF) for details on how our standard symbology is constructed. If the fault measurement is for a minor fold, set MappedFeat="no and change symbology as appropriate.

Description Symbol Feature Classes & Attributes Comment
fold-syncline map symbol Fold_line
  • Geometry="syncline"
  • Attitude="upright"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="upward"
Fold_point
  • MappedFeat="yes"
  • Geometry="syncline"
  • Attitude="upright"
  • FldAxisTrd="045"
  • FldAxisPlg="25"
Fold_symbol
  • SymClass="syncline"
  • SymbolType="upright"
  • RotaAngle=[variable]
 Arrows are placed by the position of the Fold_Symbol point.
fold-syncline-overturned map symbol Fold_line
  • SymClass="syncline"
  • Attitude="overturned"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="N"
Fold_point
  • MappedFeat="yes"
  • Geometry="syncline"
  • Attitude="overturned"
  • MapAsymm="Z-fold"
  • FldAxisTrd="045"
  • FldAxisPlg="25"
Fold_symbol
  • SymClass="syncline"
  • SymbolType="overturned"
  • RotaAngle=[variable]
 [Fold faces North because younger beds are to the North.]
fold-synform map symbol Fold_line
  • Geometry="synform"
  • Attitude="unknown"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="unknown"
Fold_symbol
  • SymClass="synform"
  • RotaAngle=[variable]
  
fold-anticline map symbol Fold_line
  • Geometry="anticline"
  • Attitude="upright"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="upward"
Fold_symbol
  • SymClass="anticline"
  • SymbolType="upright"
  • RotaAngle=[variable]
  
fold-anticline-overturned fold symbol Fold_line
  • Geometry="anticline"
  • Attitude="overturned"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="S"
Fold_symbol
  • SymClass="anticline"
  • SymbolType="overturned"
  • RotaAngle=[variable]
 [Facing is to the south because younger beds are to the south.]
fold-antiform map symbol Fold_line
  • Geometry="antiform"
  • Attitude="unknown"
  • FoldLnType="axial trace"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="unknown"
Fold_symbol
  • SymClass="antiform"
  • RotaAngle=[variable]
  
fold-monocline map symbol Fold_line
  • Geometry="monocline"
  • Attitude="upright"
  • FoldLnType="inflection"
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="N"
Fold_symbol
  • SymClass="monocline"
  • SymbolType="inflection"
  • RotaAngle=[variable]
  
fold-monocline-synclinal bend map symbol Fold_line
  • Geometry="monocline"
  • Attitude="upright"
  • FoldLnType="synclinal bend "
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="N"
Fold_symbol
  • SymClass="monocline"
  • SymbolType="bend"
  • SymSubType="synclinal"
  • RotaAngle=[variable]
  
fold-monocline-anticlinal bend map symbol Fold_line
  • Geometry="monocline"
  • Attitude="upright"
  • FoldLnType="anticlinal bend "
  • Confidence="certain"
  • Exposure="exposed"
  • Facing="N"
Fold_symbol
  • SymClass="monocline"
  • SymbolType="bend"
  • SymSubType="anticlinal"
  • RotaAngle=[variable]
  
minor_fold-vertical map symbol Fold_point
  • MappedFeat="no"
  • Geometry=[variable]
  • Attitude="vertical"
  • MapAsymm=[variable]
  • FldAxisPlg="90"
  
minor_fold-horizontal map symbol Fold_point
  • MappedFeat="no"
  • Geometry=[variable]
  • Attitude="horizontal"
  • MapAsymm=[variable]
  • FldAxisTrd="70"
  • FldAxisPlg="0"
  
minor_fold-anticline-inclined map symbol Fold_point
  • MappedFeat="no"
  • Geometry="anticline"
  • Attitude="inclined"
  • FldAxisTrd="72"
  • FldAxisPlg="20"
  
minor_fold-syncline-inclined map symbol Fold_point
  • MappedFeat="no"
  • Geometry="syncline"
  • Attitude="inclined"
  • FldAxisTrd="72"
  • FldAxisPlg="20"
  
minor_fold-sinistral-inclined map symbol Fold_point
  • MappedFeat="no"
  • Geometry="parasitic"
  • Attitude="inclined"
  • MapAsymm="sinsistral"
  • FldAxisTrd="40"
  • FldAxisPlg="90"
  
minor_fold-dextral-inclined map symbol Fold_point
  • MappedFeat="no"
  • Geometry="parasitic"
  • Attitude="inclined"
  • MapAsymm="dextral"
  • FldAxisTrd="30"
  • FldAxisPlg="92"
  
minor_fold-dextral-inclined map symbol Fold_point
  • MappedFeat="no"
  • Geometry=[anticline or antiform]
  • Attitude="inclined"
  • MapAsymm="hinge"
  • FldAxisTrd="20"
  • FldAxisPlg="72"