Technical Drawing - Exam Papers - Higher - 1993 - Building
(a) On a contour map A and B are two points whose altitudes are 75 m and 95 m, respectively. On the map B is located 110 m north-east of A. A skew bore-hole at A is drilled in a south-easterly direction in plan and has an actual inclination of 50° to the horizontal plane. It reveals the top and bottom surfaces of a stratum at distances of 40 m and 65 m, respectively from A.
A skew bore-hole at B is drilled in a south-westerly direction in plan and has an actual inclination of 55° to the horizontal plane. It reveals the top and bottom surfaces of the stratum at distances of 15 m and 40 m, respectively from B.
Determine the dip, strike and thickness of the stratum.
Scale 1: 1000