Recall from Parts A and B that the difference in elevation between placemarks A and B was 120 meters and that the distance between the placemarks was 155 meters. Calculate the dip angle of the Fountain Formation in this area between placemarks A and B.

37.75°

Explanation:

The distance between place marks A and B (AB) is 155 meters. The change in elevation (Δh) between A and B is 120 meters.

Dip is the angle at which a planar feature is inclined to the horizontal plane; The dip angle is always in a vertical plane and is measured downward from the horizontal plane, the dip is also perpendicular to the strike.

The dip angle of the Fountain Formation can be found by the following formula:

dip angle = tan⁻¹(change in elevation/distance) = tan⁻¹(Δh/d)

Substituting:

Dip angle = tan⁻¹(120/155) = 37.75°

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the rub-al-khali is also known as the arabian desert and the "empty quarter"