ASBOG FG Terms| Questions with Correct Answers| Latest Update Guaranteed Success
Blind Thrust A thrust fault that does not reach the ground surface
detachment fault A low-angle normal fault associated with regional extension
Dip-slip Fault A fault in which the movement is parallel to the dip of the fault. (ex. normal,
reverse, or listric fault)
Fenster A "window" into rocks underlying a thrust fault
Footwall block The block that underlies a non-vertical fault
Ga Giga-annum; one billion years
GIS Geographic Information System
GPS Global Positioning System
Growth Fault A fault that forms contemporaneously with deposition in sedimentary rock.
The throw increases with depth and the sedimentary units on the downthrown side are thicker
than the corresponding units on the upthrown side
Hanging-wall block The block that overlies a non-vertical fault
Heave The amount of horizontal displacement on a fault
Ka Kilo-annum; one thousand years
, Klippe An outlier of a thrust sheet completely surrounded by the exposed footwall
Key Beds A well-defined, easily identified strata that is distinctive enough to be useful in
correlation in mapping
Listric Fault A fault with a curved fault plane. Near the surface the fault plane is steeply
dipping, but it becomes progressively flatter with depth. Listric faults may be normal or reverse.
Ma Mega-annum; one million years
Magnetic Declination true north - magnetic north
Nappe A sheetlike rock unit that has moved over other rocks (allochthonous) on a
predominantly horizontal surface
Net Slip distance between two formerly adjacent points on other side of the fault
Nonconformity an uncomformity formed by older igneous rocks in contact with younger
sediments, indicating a missing time after the igneous intrusion
Normal Fault dip-slip fault in which the hanging wall drops down relative to the footwall
(Dip: 45-90 deg)
Oblique-slip Fault A fault in which movement is not parallel to the strike or dip of the fault
plane
Offset The horizontal component of displacement measured perpendicular to the strike of
the disrupted unit
Blind Thrust A thrust fault that does not reach the ground surface
detachment fault A low-angle normal fault associated with regional extension
Dip-slip Fault A fault in which the movement is parallel to the dip of the fault. (ex. normal,
reverse, or listric fault)
Fenster A "window" into rocks underlying a thrust fault
Footwall block The block that underlies a non-vertical fault
Ga Giga-annum; one billion years
GIS Geographic Information System
GPS Global Positioning System
Growth Fault A fault that forms contemporaneously with deposition in sedimentary rock.
The throw increases with depth and the sedimentary units on the downthrown side are thicker
than the corresponding units on the upthrown side
Hanging-wall block The block that overlies a non-vertical fault
Heave The amount of horizontal displacement on a fault
Ka Kilo-annum; one thousand years
, Klippe An outlier of a thrust sheet completely surrounded by the exposed footwall
Key Beds A well-defined, easily identified strata that is distinctive enough to be useful in
correlation in mapping
Listric Fault A fault with a curved fault plane. Near the surface the fault plane is steeply
dipping, but it becomes progressively flatter with depth. Listric faults may be normal or reverse.
Ma Mega-annum; one million years
Magnetic Declination true north - magnetic north
Nappe A sheetlike rock unit that has moved over other rocks (allochthonous) on a
predominantly horizontal surface
Net Slip distance between two formerly adjacent points on other side of the fault
Nonconformity an uncomformity formed by older igneous rocks in contact with younger
sediments, indicating a missing time after the igneous intrusion
Normal Fault dip-slip fault in which the hanging wall drops down relative to the footwall
(Dip: 45-90 deg)
Oblique-slip Fault A fault in which movement is not parallel to the strike or dip of the fault
plane
Offset The horizontal component of displacement measured perpendicular to the strike of
the disrupted unit
