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Strike of limestone bed inclined east at 45°

Short answer

Inclined towards east means dip direction is due east (90°). Strike is perpendicular, so north-south (0°/180°). Strike is N–S, dipping 45° east.

The limestone bed is inclined towards east with an inclination angle of 45°. Find the strike.

The bed is inclined towards the east, so the dip direction is due east (azimuth 90°). Strike is at 90° to the dip direction.

Strike=90°±90°=0° or 180°\text{Strike} = 90° \pm 90° = 0° \ \text{or}\ 180°

Hence the strike is north-south (N-S), written N00°E. The bed strikes N-S and dips 45° towards the east.

            N
            |  strike (N-S)
            |
     W -----+------> E  dip direction
            |
            S

Answer: Strike = N-S (0°/180°).

✓ Answer checked by Claude Opus 5.5 (high effort)

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