STRUCTURAL GEOLOGY HATCHER 11

Question 1

Belt of thrust faults occuring between underformed craton and metamorphic core of nearly every mountain

Answer 1

Foreland Fold-Thrust Belt

Question 2

Zones of weak rocks (shale , coal or strong unit suscpetible to strain softening) where thrusts generaly propagates. French for “Ungluing”

Answer 2

Detachment or Decollements or Bedding thrusts

Question 3

A high angle segment which may exist where thrust cuts across a strong unit from one detachment to another

Answer 3

Ramp (High Angle Decollement)

Question 4

Thickness of strong units

Answer 4

Strut

Question 5

Formed by faulting the CONNECTING LIMB of a anticline and syncline pair overthrowing the haging wall anticline and preserving footwall syncline

Answer 5

Break Thrust/Fold Thrust

Question 6

A Break Thrust formed independently of folding but not having a footwall syncline

Answer 6

Shear Thrust/Fracture Thrust

Question 7

Formed as the THRUST SURFACE CHANGES from steeper dip to shallower in an up-dip direction (Surface)
Steeply dipping sa ilalim tapos biglang naging gentle sa ibabaw *Hanging wall anticline NO FOOT WALL Syncline

Nagchange lang yung steepnes ng dip and nagterminate sa surface

Answer 7

Fault Bend Fold
(ShearThrust/Fracture Thrust)

Question 8

Formed as layers of a Sed Sequence fold during propagation of thrust (Hanging Wall Anticline plus Footwall Syncline

Nagfold yung sed layers nung nag thrust faulting nagterminate sa fault ramp

Answer 8

Fault Progation Fold
(Break Thrust/Fold Thrust)

Question 9

Fault Bend Fold: Shear Thrust: Fault Propagation fault:

Answer 9

Break Thrust

Question 10

Folds that form near the thrust sruface due to friction wherein the footwall are deformed to synclines and the hanging wall to antilines

Answer 10

Drag Folds

Question 11

Materials that have been grinded due to faulting and may be transported within the fault zone under the thrust sheet

Mga fragments of rocks or asperities na naerode due to faulting at natrap sa gitna ng footwall and hanging wall

Answer 11

Horses (Hanging Wall Fragments)

Slices (Footwall Fragmets)

Question 12

Whats the age of the horses?

Answer 12

intermediate between the ages of the hanging and footwall

Question 13

Smaller faults in a group of thrust faults

Answer 13

Imbricate Thrusts

Question 14

Series of thrusts making up the entire foreland thrust belt

Answer 14

Imbricate Zone

Question 15

Strutures bounded by two thrust fault of approx equal displacement separated by deformed interval that is thin relative to its total area and the Upper an Lower Master fault connected by imricates

Answer 15

Duplex

Question 16

Upper Master fault

Answer 16

Roof Thrust

Question 17

Lower Master Fault

Answer 17

Floor Thrust

Question 18

Line of intersection of two fault surfaces

Answer 18

Branch Line

Question 19

A thrust that terminates at the surface

Answer 19

Erosion or Emergent Thrust

Question 20

A thrust that was aborted within the sedimentary section and never reached the surface

Answer 20

Blind Thrust

Question 21

Ends of thrust sheets that terminate in strike slop faults

Answer 21

Tear Faults

Question 22

When there’s a hole in the thrust sheet/hanging wall formed during folding, the footwall rocks are exposed surrounded by steeply dipping haging wall rocks such hole is called

Answer 22

Simple window or Fenster

Question 23

An erosional feature formed by renewed movement in an foled thrust sheet which creates an opening along the fault surface and will appear to be partly closed because the elongate outcrop pattern prallels tha fault trace

Answer 23

Eyelid Windows

Question 24

If an exposed footwall is exposed surrounded by the rocks of the hanging wall and the contact is an unconformity it is called

Answer 24

Inlier

Question 25

Disemembered part of a thrust sheet (Iniwan at nahiwalay na part ng thrust sheet).
Erosional Outliers

Answer 25

Klippe

Question 26

Larger separated remnant of a thrust sheet

Answer 26

Allochton

Question 27

Thrusts that involves transport of basement metamorphic and igneous rocks or both as part of the thrust sheet (Hanging Wall)

Answer 27

Crystalline Thrust