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RS Finals (PPT) > First Meeting PPT > Flashcards

First Meeting PPT Flashcards

1
Q

the structural attributes of bedding attitude

A

bed, bedding plane, dip, azimuth, strike, talus

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2
Q

angle of the plane of structure, horizontal; angle of inclination of the feature or structure

A

dip

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3
Q

has a perpendicular relationship
with the strike and dip

A

azimuth

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4
Q

direction of the line of the vertical
projection of the feature to the horizontal plane

A

strike

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5
Q

sediment accumulated to the base
of the slope

A

talus

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6
Q

what are the difference between azimuthal and strike reading?

A

azimuthal reading has 360° angular direction; strike reading has angular measurements (quadrants)

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7
Q

attributes of beds on aerial photographs

A

1) beds appear as linear feature
2) occur in a form of a group of persistent linear ridges
3) follow parallelism
4) abrupt termination is indicative of a fault

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8
Q

in photo-interpretation, beds can be classified through the basis of:

A

dip amount

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9
Q

beds can be classified into three groups which are:

A
  1. Horizontal and dipping beds
  2. Medium dipping beds
  3. Steep and vertical dipping beds
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10
Q

in the photographic attributes of horizontal beds, beds are distinguished by:

A

tonal contrast and different resistance to erosion

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11
Q

in horizontal beds, the bands are parallel to what?

A

topographic contours

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12
Q

the function of how susceptible rocks will erode

A

elevation

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13
Q

what is the general drainage pattern in horizontal beds?

A

dendritic

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14
Q

horizontal beds can be observed unless obliterated by?

A

talus

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15
Q

T or F: Contour line is the term used in describing beds in aerial photo-interpretation

A

False. Bedding plane.

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16
Q

in medium-dipping beds, bedding is expressed by bands of differing _________________________ in slope due to the resistance of beds

A

photographic tone or topographic breaks

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17
Q

what causes the abrupt change is slope angle in medium-dipping beds?

A

breaks in slope

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18
Q

T or F: Resistant beds are thicker than less-resistant beds.

A

False. Resistant beds appear thin as compared to less-resistant beds.

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19
Q

why does resistant beds have thinner bands and less
resistant beds having wider bands

A

due to angle of repose (caused by change in dip angles and differential weathering/erosion)

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20
Q

what does the medium-dipping beds allow to determine?

A

dip amount, dip direction, and the strike of the beds

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21
Q

an asymmetric ridge

A

dip-slope or Cuesta

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22
Q

the longer, gentle slope in a cuesta

A

face slope

23
Q

the steeper part of a cuesta

A

steep slope

24
Q

may be applied to determine the direction of the dip where a
stream valley intersects the trace of a bed

A

Rule of ‘V’

25
Q

the ‘V’ in the outcrop pattern will point to the:

A

direction of the dip

26
Q

T or F: Less-resistant beds has advanced erosion.

A

True

27
Q

the relationship between the size of the outcrop pattern and the dip magnitude

A

inversely proportional

28
Q

if the outcrop pattern is small and narrow, what is its corresponding dip angle?

A

higher dip angle

29
Q

what do you call the diagnostic landscape of a steeply-dipping bed that has sharp, straight or slightly curved ridges with same high dipping opposing slopes

A

hogback

30
Q

steeply-dipping beds are often covered by talus in which side of a hogback ridge?

A

both sides

31
Q

T or F: in steeply-dipping beds, the long axis is proportional to the strike of the bedding.

A

False. the long axis is PARALLEL to the strike of the bedding

32
Q

T or F: The true thickness of a vertical or nearly vertical bed is difficult to measure in steeply-dipping beds

A

False. It can be easily measured.

33
Q

what are the criteria to determine the direction of the dip?

A

Rule of ‘V’, Drainage characteristics

34
Q

In the ‘V’ Rule, which part of the V always points to the dip
direction?

A

the apex of V

35
Q

The long and narrow V shape shows

A

less dip amount or gently sloping beds

36
Q

Short and wide V shape refers to

A

medium and steep dipping beds

37
Q

T or F: Dips could be gentle, if the relatively long
tributary systems commonly flow down the
face slopes.

A

True

38
Q

what does short tributary streams characterize?

A

back slopes

39
Q

high drainage density corresponds to ____________

A

steep dip

40
Q

the amount of channels in a given unit area. it is a function of how much time water has to accumulate in a channel.

A

drainage density

41
Q

in drainage characteristics, gentler slopes mean

A

less drainage density

42
Q

form zig-zag shape or ‘V’ shape pattern on aerial photograph

A

folds

43
Q

A plunging anticline forms a V-shaped outcrop pattern with the apex (or nose) pointing to which direction?

A

direction of the plunge

44
Q

T or F: Does plunging synclines form a similar pattern?

A

True. Plunging synclines form a similar pattern.

45
Q

limbs opening at the direction of the plunge

A

syncline

46
Q

roughly circular to elliptical outcrop, where beds dipping away form a central area.

A

Dome

47
Q

T or F: Eroded dome is made up of the youngest bed at the center with older rock units located outward.

A

False. Oldest beds are at the center, while younger rock units are located outward.

48
Q

Dome forms which drainage pattern?

A

Radial pattern

49
Q

If the structure has been dissected by ______________, the V in the outcrop points __________ from the center of a basin.

A

stream erosion; outward

50
Q

elliptical or circular outcrop pattern; beds dip toward the central area

A

basin

51
Q

T or F: In basin-shaped structures, the youngest strata are located at the center.

A

True

52
Q

If the structure has been dissected by _____________, the V in the outcrop points __________ the center of a basin.

A

stream erosion; toward

53
Q

appear as lines or zones or displacement that abruptly offset
structures and terminate contracts between formations

A

fault patterns

54
Q

generally dip at a low angle and appear as a zig-zag irregular trace

A

thrust fault

RS Finals (PPT) (3 decks)

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