Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Geology > Structural Exam 2 > Flashcards

Structural Exam 2 Flashcards

1
Q

Vergence

A

Direction relating to the sense of asymmetry folds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Antiform

A

Rainbow shaped, age is unknown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Fold axis

A

Straight hinge on a cylindrical fold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Concoical fold

A

Doesn’t have a fold axis, but has a hinge line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Hinge

A

Top of a fold where the direction changes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Axial Plane

A

Successive hinge line lie on the same plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Axial Trace

A

The intersection of the axial surface with any other plane

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

S-Fold

A

The right side of a parasitic fold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Z-fold

A

The left side of a parasitic fold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

How is the attitude of a fold defined and described?

A

Hinge and axial surface orientation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Requirements of Buckling

A
  1. Active folding
  2. Layer has mechanical significance
  3. layer is shortened parallel to layering
  4. layer must be more competent than the surrounding material
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Parasitic folds

A

Small folds related to larger folds

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

M-Folds

A

Top of the parasitic fold

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Anticline

A

Rainbow shaped, age is known

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Synform

A

Smile shaped, age is unknown

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Syncline

A

Smile shaped, age is known

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Synformal Anticline

A

Upside down anticline

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Antiformal syncline

A

Upside down syncline

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Cylindrical fold

A

Straight hinge line

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Limb

A

Area between hinge areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Axial surface

A

The surface containing hinge lines fro consecutive folded surfaces

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Passive folding

A

Layer with no mechanical significance

23
Q

Bending

A

Forces acting across layers causing folding, active folding mechanism

24
Q

What effects the wavelength of a fold?

A

Thickness of the bed, strength of the bed, strength of the surrounding material

25
Q

What mechanisms affect folding?

A

Orthogonal flexure, flexure shear (slip or flow buckling)

26
Q

Where is strain concentrated in folding?

A

The Crux

27
Q

What is the anticline symbol?

A

Line with perpendicular arrows that point outwards

28
Q

What is the syncline symbol?

A

Line with perpendicular arrows that point inwards

29
Q

Aysmmetric fold symbol

A

line with perpendicular arrows on each side pointing outwards

30
Q

What is the overturned fold symbol?

A

Line with a U-shaped double arrow

31
Q

Fabric

A

Geometric arrangement of penetrative and distributive components

32
Q

Foliation

A

FAbric elements that is planar and parallel

33
Q

Cleavage

A

Fabric elements that impacts a splitting property

34
Q

How can cleavage be used to interpret folding patterns and younging directions?

A

the acute angle closes and whatever direction it closes in points to the hinge

35
Q

Small crinkly lineation

A

Crenulation lineation

36
Q

Large uniform scratches from glaciers

A

Glacial Striations

37
Q

Grooves from the movement of a fault

A

fault slickenlines

38
Q

intersection of 2 planar features

A

intersection lineation

39
Q

layers show causing lineation

A

Bedding/cleavage lineation

40
Q

The result of 2 equally developed tectonic cleavages

A

Mullion structures

41
Q

layer sets compressed in some spots, beaded necklace like

A

Boudinage

42
Q

Fabric element, slightly metamorphosed

A

stretch pebble conglomerate

43
Q

Class 1a fold

A

Limbs are thicker than the hinge

44
Q

Class 1b fold

A

Limb thickness is constant

45
Q

Class 1c fold

A

Hinge is thicker than limbs

46
Q

Class 2 fold

A

Inner and outer arcs have identical curvature

47
Q

Class 3 fold

A

Curvature of outer arc is greater than the inner arc

48
Q

Chevron folds

A

sharp hinges, straight limbs

49
Q

Box fold

A

Two planes fold inwards, making omega sign

50
Q

Ptygmatic Folds

A

irregular, chaotic, no constant thickness; usually
found in metamorphic rocks. Looks like a wiggle worm

51
Q

Order of major foliation types based on temp and depth

A

Compaction –>Cleavage –>Pencil –>Slaty –>Phylittic –>Schistosity –>Gneissic

52
Q

What leads to the presences of more cleavage

A

High clay content

53
Q

Primary Fabric

A

Original to when the rock formed

54
Q

Tectonic Fabric

A

results from stress/deformation/metamorphism

Geology (10 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions