A Method for Estimation of Dip-Strike at Any Point from Irregularly Spaced Dip-Strike Data

— Strike-Line Map —

Abstract

In this paper, we presented the principle and the BASIC program for the numerical estimation of the dip-strike of a bed at any point from dip-strike data obtained at irregularly spaced outcrops (observation points) . In order to represent numerically the attitude of the bed, we defined a new term of “a normal vector of abed” (an unit vector which is normal to the bedding plane and is oriented in the direction of the geologically upper side of the bed) . The dip-strike is calculated here from the weighted average of the normal vectors of beds at observation points. The presented program estimates dip-strikes at grid points and displayed them on the screen of a personal computer as the strike-line map.