Question

The strike and dip of the axial plane of a reclined fold is 022° and 28° SE, respectively. The plunge direction (in whole circle bearing) of the axis of the reclined fold is ________ degrees. \text{[in integer]}

Hint:

The plunge direction of a fold is the strike of the fold plus the plunge of the axis, with adjustments made for the quadrant in which the fold lies.

Answer 1

Correct Answer: 112

The plunge direction of the axis of a fold is calculated by using the following relationship:
\[ \text{Plunge direction} = \text{Strike} + \text{Plunge of the axis}. \]
Given: - Strike = 022°,
- Dip = 28° SE.
The plunge direction (in whole circle bearing) can be calculated as follows: - For a fold axis in the SE quadrant, the plunge direction is \( \text{Strike} + 90^\circ \).
\[ \text{Plunge direction} = 022^\circ + 90^\circ = 112^\circ. \] Thus, the plunge direction of the axis of the reclined fold is \( \boxed{112^\circ} \).