Maps and geological structure

Question 1

Anticline

Answer 1

folded structure that arches upwards in the center (limbs dip away from axial plane)

Question 2

Cordillera

Answer 2

extensive chain of mountains or mountain ranges. Form primarily in response to plate tectonics
Cross-Section

Question 3

Hinge Line

Answer 3

line where the dipping limbs join

Question 4

Monocline

Answer 4

fold like carpet draped over a stair step. These faults do not cut though to the surface

Question 5

Plunging fold

Answer 5

when hinge line plunges downward into the ground (is not horizontal). A plunging fold has a hinge that is tilted

Question 6

Reverse fault

Answer 6

hanging wall moves upward relative to footwall due to compressional forces, >30*
Ridge

Question 7

Rule of V’s

Answer 7

principle used to interpret the direction of dip of rock layers on topographic map

Question 8

Syncline

Answer 8

folded structure that arches downward in the center (limbs dip in towards axial plane)

Question 9

Thrust Fault

Answer 9

type of reverse fault where plane has a very low angle typically <30*