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Structural Geology Spreadsheets
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ApparentDip.xls:
Calculates apparent dip value given a strike and dip, and an apparent dip
bearing. (Excel format)
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StrikeAndDip.xls:
Calculates the strike and dip of a structural plane given two apparent dip
bearing and plunge values measured on the plane. (Excel format)
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ThreePoint.xls: Calculates
the strike and dip of a structural plane that contains 3 points of known
location and elevation. Also calculates the hydraulic gradient if the 3
points are water table elevations.
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Rotation.xls: Calculates the
new orientation of a line given a starting orientation, a rotational axis
orientation, and the amount and sense of rotation. The algorithm may also
be used to find the rotated orientation of a structural plane if the
orientation of the pole to the plane is used as the starting orientation.
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SCslip.xls: Calculates the
orientation of the slip vector given the attitude of the S and C planes
measured from an S/C mylonite zone.
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SphericalRotation.xls:
Calculates the new geodetic position of a point on Earth given the starting
geodetic coordinates (latitude/longitude), and the geodetic coordinates
of the rotation axis, and the amount and sense of the rotation. This
algorithm is typically used to track tectonic plate position over time
given an absolute pole of rotation.
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Alidade_Datasheet.xls:
reduces data taken with a standard alidade (stadia intercept, crosshair,
vertical angle) and converts to the vertical and horizontal offset from the
instrument base position.
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