Skew Boreholes (Leaving Cert DCG): Flashcards

Non-parallel boreholes used in geological surveying

Not parallel to each other

Strike, dip, and thickness

Horizontal direction of rock layers

Angle at which rock layers are inclined

Perpendicular distance between top and bottom surfaces of stratum

Connect points where both boreholes intersect same geological level

Maximum angle of inclination, measured perpendicular to strike

Angle seen from directions other than perpendicular to strike

Apparent dip ≤ true dip