First Meeting PPT

Question 1

the structural attributes of bedding attitude

Answer 1

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

Question 2

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

Answer 2

dip

Question 3

has a perpendicular relationship
with the strike and dip

Answer 3

azimuth

Question 4

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

Answer 4

strike

Question 5

sediment accumulated to the base
of the slope

Answer 5

talus

Question 6

what are the difference between azimuthal and strike reading?

Answer 6

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

Question 7

attributes of beds on aerial photographs

Answer 7

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

Question 8

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

Answer 8

dip amount

Question 9

beds can be classified into three groups which are:

Answer 9

1. Horizontal and dipping beds
2. Medium dipping beds
3. Steep and vertical dipping beds

Question 10

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

Answer 10

tonal contrast and different resistance to erosion

Question 11

in horizontal beds, the bands are parallel to what?

Answer 11

topographic contours

Question 12

the function of how susceptible rocks will erode

Answer 12

elevation

Question 13

what is the general drainage pattern in horizontal beds?

Answer 13

dendritic

Question 14

horizontal beds can be observed unless obliterated by?

Answer 14

talus

Question 15

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

Answer 15

False. Bedding plane.

Question 16

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

Answer 16

photographic tone or topographic breaks

Question 17

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

Answer 17

breaks in slope

Question 18

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

Answer 18

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

Question 19

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

Answer 19

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

Question 20

what does the medium-dipping beds allow to determine?

Answer 20

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

Question 21

an asymmetric ridge

Answer 21

dip-slope or Cuesta

Question 22

the longer, gentle slope in a cuesta

Answer 22

face slope

Question 23

the steeper part of a cuesta

Answer 23

steep slope

Question 24

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

Answer 24

Rule of ‘V’

Question 25

the 'V' in the outcrop pattern will point to the:

Answer 25

direction of the dip

Question 26

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

Answer 26

True

Question 27

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

Answer 27

inversely proportional

Question 28

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

Answer 28

higher dip angle

Question 29

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

Answer 29

hogback

Question 30

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

Answer 30

both sides

Question 31

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

Answer 31

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

Question 32

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

Answer 32

False. It can be easily measured.

Question 33

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

Answer 33

Rule of 'V', Drainage characteristics

Question 34

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

Answer 34

the apex of V

Question 35

The long and narrow V shape shows

Answer 35

less dip amount or gently sloping beds

Question 36

Short and wide V shape refers to

Answer 36

medium and steep dipping beds

Question 37

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

Answer 37

True

Question 38

what does short tributary streams characterize?

Answer 38

back slopes

Question 39

high drainage density corresponds to ____________

Answer 39

steep dip

Question 40

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

Answer 40

drainage density

Question 41

in drainage characteristics, gentler slopes mean

Answer 41

less drainage density

Question 42

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

Answer 42

folds

Question 43

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

Answer 43

direction of the plunge

Question 44

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

Answer 44

True. Plunging synclines form a similar pattern.

Question 45

limbs opening at the direction of the plunge

Answer 45

syncline

Question 46

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

Answer 46

Dome

Question 47

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

Answer 47

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

Question 48

Dome forms which drainage pattern?

Answer 48

Radial pattern

Question 49

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

Answer 49

stream erosion; outward

Question 50

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

Answer 50

basin

Question 51

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

Answer 51

True

Question 52

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

Answer 52

stream erosion; toward

Question 53

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

Answer 53

fault patterns

Question 54

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

Answer 54

thrust fault