Structural Geology · Runs entirely in your browser · PyScript
Apparent ↔ True Dip
A plane's apparent dip depends on the direction you cut through it — only the section perpendicular to strike shows the true dip. Use this to go either direction: compute an apparent dip from a known true dip, or back out the true dip from two apparent-dip measurements.
Inputs
Section 1
Section 2
Ready.
tan(apparent dip) = tan(true dip) × cos(β)
where β is the acute angle between the section trend and the true dip direction.
where β is the acute angle between the section trend and the true dip direction.