Intro | Tabular Bodies | Definition | Map Symbols | Special Symbols | Measuring
 
  On a map, strike and dip are represented by a T-shaped symbol (Fig. 1). The long bar of the T is parallel to the strike and the short bar of the T indicates the dip direction. Since dip is always measured at right angles to strike, the strike and dip components are always perpendicular to each other. The dip angle is indicated by placing the angle (in degrees) next to the strike and dip symbol. In contrast, the strike orientation is not explicitly recorded by the strike and dip symbol.
 
 
Fig. 1: Strike and dip symbol on a map.
  
  To determine the strike of a feature on a geologic map, use a straight edge to lightly draw in pencil a line parallel the map's north direction that intersects the strike line of the strike and dip symbol then xtend the strike line. The strike of the feature is the angle between these two lines and can be measured with a protractor.
  
 
  Intro | Tabular Bodies | Definition | Map Symbols | Special Symbols | Measuring
 
 
 
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Copyright @ 2010 J.D. Myers