lab 10 Flashcards

1
Q

attitude

A

orientation of a rock unit, surface( contact) or line relative to horizontal and or compass direction

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2
Q

strike

A

compass bearing (line of discretion or trend) of a line formed by the intersection of a horizontal plane such as the surface of a lake and inclined surface (contact) or rock layers such as bed stratum or formation

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3
Q

dip

A

angle between a horizontal plane, measured perpindiciular

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4
Q

tension

A

lengthening

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5
Q

compression

A

shortening

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6
Q

shear

A

tearing and smearing

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7
Q

dip slip

A

normal, reverse

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8
Q

strike slip

A

right, left

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9
Q

reverse

A

high angle dip slip

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10
Q

thrust

A

low angle reverse fault

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11
Q

anticlines

A

up

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12
Q

synclines

A

down

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13
Q

3 features

A
  1. limb
  2. fold axis
  3. axis of fold
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14
Q

anticline

A

oldest in center

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15
Q

syncline

A

younger in center

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16
Q

folded structures

A

basin downwarped, circular, oldest in center , anticline
dome upwarped, youngest in center syncline
monocline buried fault

17
Q

geologic maps

A

-show where rock strata occur at earths surface

18
Q

tectonic maps

A

movement history

19
Q

tectonstratatigrpahpic

A

basic map elements

20
Q

Precambrian

A

ancient rocks , 1200 and 1080 years ago

21
Q

Paleozoic ouachitan cycle

A

about 550 mya, ending 245, foreland

22
Q

gulf coast

A

began in Texas in late triassic about 220 Maya, mountain building event Laramie orogeny occurred in west Texas, event created the rocky mountains