ASBOG-FG Exam Questions with Correct Answers| Latest Update Guaranteed Success
Accuracy How close to a measurement conforms with a standard or accepted value.
Apparent dip (α) The inclination of a plane measured in a direction not perpendicular to
strike.
Apparent dip direction The bearing of the vertical plane containing the apparent dip angle.
Attitude The orientation in space.
β The angle between strike and the apparent dip direction.
Bearing The horizontal angle between a line and a specified coordinate direction, usually
north or south.
Dip (δ) The inclination of the line of greatest slope of an inclined plane, measured
perpendicular to strike.
Fold Line A hinge line along which a vertical cross section may be constructed and the
flattened out to a horizontal or map view.
Inclination A general term for the vertical angle between the horizontal and a plane or line
measured downward.
Outcrop Width (w) The width of an outcrop, as measured on a map view, perpendicular to
strike.
Pole A line perpendicular to a plane, and represented as a point on a stereographic
projection.
, Plunge The vertical angle between a line and horizontal.
Precision The degree of agreement or consistency of repeated measurements
Projection The process by which points on one surface are transferred to another surface,
such that in each view (map or cross section) the points correspond.
Rake (Pitch) The angle measured in a specific plane, between a line and the horizontal.
Slope Angle (σ) The angle from the horizontal down to the slope.
Stereonet A representation of angular relationships between planes and lines. In structural
geology, a stereonet is synonymous with Wulff net, an equal angle stereographic projection.
Strike The bearing of a horizontal line in an inclined plane.
Thickness (t) The perpendicular distance between the top and bottom of a geologic unit.
Trend The bearing of the vertical plane containing a line.
Blind Thrust A thrust fault that dies out in the subsurface as it looses slip and stratigraphic
seperation
Detachment Fault A low-angle normal fault
Dip-Slip Fault A fault in which the movement is parallel to the dip of the fault plane, such as
a normal, reverse, or listric fault
Accuracy How close to a measurement conforms with a standard or accepted value.
Apparent dip (α) The inclination of a plane measured in a direction not perpendicular to
strike.
Apparent dip direction The bearing of the vertical plane containing the apparent dip angle.
Attitude The orientation in space.
β The angle between strike and the apparent dip direction.
Bearing The horizontal angle between a line and a specified coordinate direction, usually
north or south.
Dip (δ) The inclination of the line of greatest slope of an inclined plane, measured
perpendicular to strike.
Fold Line A hinge line along which a vertical cross section may be constructed and the
flattened out to a horizontal or map view.
Inclination A general term for the vertical angle between the horizontal and a plane or line
measured downward.
Outcrop Width (w) The width of an outcrop, as measured on a map view, perpendicular to
strike.
Pole A line perpendicular to a plane, and represented as a point on a stereographic
projection.
, Plunge The vertical angle between a line and horizontal.
Precision The degree of agreement or consistency of repeated measurements
Projection The process by which points on one surface are transferred to another surface,
such that in each view (map or cross section) the points correspond.
Rake (Pitch) The angle measured in a specific plane, between a line and the horizontal.
Slope Angle (σ) The angle from the horizontal down to the slope.
Stereonet A representation of angular relationships between planes and lines. In structural
geology, a stereonet is synonymous with Wulff net, an equal angle stereographic projection.
Strike The bearing of a horizontal line in an inclined plane.
Thickness (t) The perpendicular distance between the top and bottom of a geologic unit.
Trend The bearing of the vertical plane containing a line.
Blind Thrust A thrust fault that dies out in the subsurface as it looses slip and stratigraphic
seperation
Detachment Fault A low-angle normal fault
Dip-Slip Fault A fault in which the movement is parallel to the dip of the fault plane, such as
a normal, reverse, or listric fault
