ASBOG-FG Exam with Complete
Solutions
Accuracy - ANS-How close to a measurement conforms with a standard or accepted
value.
Apparent dip (α) - ANS-The inclination of a plane measured in a direction not
perpendicular to strike.
Apparent dip direction - ANS-The bearing of the vertical plane containing the apparent
dip angle.
Attitude - ANS-The orientation in space.
β - ANS-The angle between strike and the apparent dip direction.
Bearing - ANS-The horizontal angle between a line and a specified coordinate direction,
usually north or south.
Dip (δ) - ANS-The inclination of the line of greatest slope of an inclined plane, measured
perpendicular to strike.
Fold Line - ANS-A hinge line along which a vertical cross section may be constructed
and the flattened out to a horizontal or map view.
Inclination - ANS-A general term for the vertical angle between the horizontal and a
plane or line measured downward.
Outcrop Width (w) - ANS-The width of an outcrop, as measured on a map view,
perpendicular to strike.
Pole - ANS-A line perpendicular to a plane, and represented as a point on a
stereographic projection.
Plunge - ANS-The vertical angle between a line and horizontal.
Precision - ANS-The degree of agreement or consistency of repeated measurements
Projection - ANS-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) - ANS-The angle measured in a specific plane, between a line and the
horizontal.
Slope Angle (σ) - ANS-The angle from the horizontal down to the slope.
Unconformity - ANS-A gap in the geologic record; an interruptin in the depositional
sequence that implies uplift and erosion have removed part of the geologic record or
non-deposition has occured
Cenozoic Era - ANS-Present - 65 MYA
Mesozoic Era - ANS-65 - 248 MYA
Paleozoic Era - ANS-248 - 543 MYA
PreCambrian Era - ANS-543 MYA - 3.8 BYA
Quaternary Period - ANS-Present - 1.8 MYA
Tertiary Period - ANS-1.8 - 65 MYA
Cretaceous Period - ANS-65-144 MYA
Jurassic Period - ANS-144 - 206 MYA
Triassic Period - ANS-206 - 248 MYA
Permian Period - ANS-248 - 290 MYA
Carboniferous Period - ANS-290 - 323 MYA
Devonian Period - ANS-354 - 417 MYA
Silurian Period - ANS-417 - 443 MYA
Ordovician Period - ANS-443 - 490 MYA
Cambrian Period - ANS-490 - 543 MYA
Holocene Epoch - ANS-Present - .011 MYA
Pleistocene Epoch - ANS-.011 - 1.8 MYA
Pliocene Epoch - ANS-1.8 - 5.3 MYA
Miocene Epoch - ANS-5.3 - 23.8 MYA
Solutions
Accuracy - ANS-How close to a measurement conforms with a standard or accepted
value.
Apparent dip (α) - ANS-The inclination of a plane measured in a direction not
perpendicular to strike.
Apparent dip direction - ANS-The bearing of the vertical plane containing the apparent
dip angle.
Attitude - ANS-The orientation in space.
β - ANS-The angle between strike and the apparent dip direction.
Bearing - ANS-The horizontal angle between a line and a specified coordinate direction,
usually north or south.
Dip (δ) - ANS-The inclination of the line of greatest slope of an inclined plane, measured
perpendicular to strike.
Fold Line - ANS-A hinge line along which a vertical cross section may be constructed
and the flattened out to a horizontal or map view.
Inclination - ANS-A general term for the vertical angle between the horizontal and a
plane or line measured downward.
Outcrop Width (w) - ANS-The width of an outcrop, as measured on a map view,
perpendicular to strike.
Pole - ANS-A line perpendicular to a plane, and represented as a point on a
stereographic projection.
Plunge - ANS-The vertical angle between a line and horizontal.
Precision - ANS-The degree of agreement or consistency of repeated measurements
Projection - ANS-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) - ANS-The angle measured in a specific plane, between a line and the
horizontal.
Slope Angle (σ) - ANS-The angle from the horizontal down to the slope.
Unconformity - ANS-A gap in the geologic record; an interruptin in the depositional
sequence that implies uplift and erosion have removed part of the geologic record or
non-deposition has occured
Cenozoic Era - ANS-Present - 65 MYA
Mesozoic Era - ANS-65 - 248 MYA
Paleozoic Era - ANS-248 - 543 MYA
PreCambrian Era - ANS-543 MYA - 3.8 BYA
Quaternary Period - ANS-Present - 1.8 MYA
Tertiary Period - ANS-1.8 - 65 MYA
Cretaceous Period - ANS-65-144 MYA
Jurassic Period - ANS-144 - 206 MYA
Triassic Period - ANS-206 - 248 MYA
Permian Period - ANS-248 - 290 MYA
Carboniferous Period - ANS-290 - 323 MYA
Devonian Period - ANS-354 - 417 MYA
Silurian Period - ANS-417 - 443 MYA
Ordovician Period - ANS-443 - 490 MYA
Cambrian Period - ANS-490 - 543 MYA
Holocene Epoch - ANS-Present - .011 MYA
Pleistocene Epoch - ANS-.011 - 1.8 MYA
Pliocene Epoch - ANS-1.8 - 5.3 MYA
Miocene Epoch - ANS-5.3 - 23.8 MYA
