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GEOLOGY BOARD EXAM REVIEWER > Faults > Flashcards

Faults Flashcards

1
Q

Faults that have slipped recently or have potential to slip in the near future

A

Active faults

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2
Q

Branching fault that join the master fault at depth but dip in the opposite direction

A

Antithetic fault

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3
Q

Dip-slip fault in which the hanging fault has moved down relative to the footwall

A

Normal fault

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4
Q

Fault that has both a strike-slip and dip-slip component

A

Oblique-slip fault

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5
Q

Faults which follow bedding or occur parallel to the orientation of bedding planes

A

Bedding Fault

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6
Q

A fault that does not manifest onto the surface

A

Blind fault

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7
Q

Formed by faulting the connecting limb of an anticline or syncline pair overthrusting the hanging wall anticline, and preserving the footwall syncline

A

Break thrust

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8
Q

A fault which forms concentric from a point

A

Concentric point

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9
Q

A strike-slip fault that appears as conjugate sets which were active at about the same time under the same regional stress field

A

Conjugate strike slip fault

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10
Q

A fault that resulted in shortening of a body of rock

A

Contractional Fault

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11
Q

A fault that initiated as a horizontal or subhorizontal surface along which the hanging wall sheet of rock moved relative to the footwall

A

Detachment Fault / Decollement

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12
Q

A fault in which displacement occurs in a direction parallel to the dip of the fault

A

Dip-slip fault

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13
Q

A fault that terminated at the surface due to erosion

A

Emergent fault

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14
Q

Inactive, ancient fault exposed on the surface by erosion

A

Exhumed fault

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15
Q

A fault that resulted in lengthening of a layer

A

Extensional fault

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16
Q

Faults which converge or project toward a single point

A

Radial fault

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17
Q

Dip-slip fault in which the hanging wall has moved up relative to the footwall with a 45 degrees or more dip angle

A

Reverse fault

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18
Q

A pull apart en enchelon strike-slip fault with right step-overs or left step overs and form basins

A

Rhomb-graben / Rhombchasm

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19
Q

A push-up en echelons strike-slip fault with right step-overs sinistral fault or left step-over dextral and forms domes

A

Rhomb-horst

20
Q

Array of subsidiary faults that develop when stress was transferred to the overlying material

A

Riedel Shears

21
Q

A strike-slip fault that moves right parallel to the strike from a reference

A

Right-lateral Strike slip fault/ Dextral Fault

22
Q

A fault that has the amount of its slip changing along the strike, so that the hanging wall block rotates around an axis perpendicular to the fault surface

A

Scissor Fault

23
Q

Fault with a dip between about 10 and 30 degrees

A

Shallow dipping fault

24
Q

Formed independently of folding but not having a footwall syncline

A

Shear thrust

25
Q

Fault that branches from thrust and strike-slip faults

A

Splay

26
Q

Fault with a dip between about 60 and 80 degrees

A

Steeply-dipping fault

27
Q

Commonly forms in relatively unconsolidated sediments during deposition and produce thickened stratigraphic units in the downthrown block

A

Growth fault

28
Q

Fault with a dip of about 0 degrees

A

Horizontal fault

29
Q

Smaller fault in a group of thrust faults

A

Imbricate thrust

30
Q

Fault that has not slipped in a long time and is probably permanently stuck

A

Inactive fault

31
Q

Free strike-slip fault that occur along plate boundaries

A

Interplate fault

32
Q

Free strike slip fault that form within plates

A

Intraplate fault

33
Q

strike-slip fault that moved left parallel to the strike from a reference

A

Left-lateral Strike-slip Fault / Sinistral strike-slip fault

34
Q

Normal fault that exhibits steep dip near the surface but flattens with depth, with a concave up surface

A

Listric fault

35
Q

Fault with a large net slip

A

Major fault

36
Q

Fault with a dip between about 30 and 60 degrees

A

Moderately dipping faults

37
Q

Fault in which all displacement occurs in a direction parallel of the strike of the fault

A

Strike-slip Fault

38
Q

Fault with a dip between about 10 and 0 degrees

A

Subvertical fault

39
Q

Branching fault that dips in the same direction as the master fault and join it at depth

A

Synthetic Fault

40
Q

fault that bounds the edge of the thrust sheets

A

Tear fault / Lateral Ramp

41
Q

Dip slip fault in which the hanging wall has moved up relative to the foot wall, with less than 45 degrees dip angle

A

Thrust fault

42
Q

Strike-slip fault that has free tips, unconstrained by structures, which are free to move so that their length can increase as displacement accumulates

A

Transcurrent fault

43
Q

Strike-slip fault that transfer displacement from one fault to another, whose tips terminate against other fault or extension fractures

A

Transfer fault

44
Q

Large strike-slip fault that segment plates or form plate boundaries

A

Transform Fault

45
Q

Fault with a dip of about 90 degrees

A

Vertical fault

GEOLOGY BOARD EXAM REVIEWER (17 decks)

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