351 bytes added
, 22:01, 6 March 2014
True dip is the angle between an inclined surface and the horizontal, measured perpendicular to a horizontal line in the plane ([[strike]]). The dip seen in a limited data set (well bore, outcrop, cross section, seismic line, etc.) may not be perpendicular but rather cut at an angle, and is the apparent dip; this is less that the true dip.
{{stub}}