FOLDING

Question 1

is the region of greatest curvature
and separates the two limbs.

Answer 1

hinge area

Question 2

less curved portion of a fold

Answer 2

Limb-

Question 3

• The position in a limb where the
  sense of curvature changes.

Answer 3

Inflection point

Question 4

• Fold generator in cylindrical folds

Answer 4

Fold axis

Question 5

the line where the axial surface
intersects the ground or other surface. Only when
the axial plane is vertical does the axial trace and
the direction of the fold axis coincide.

Answer 5

Axial trace:

Question 6

The limbs dip away from
the center of the fold.
* The limbs dip toward the
center of the fold.
* the limbs are horizontally.
* In an the beds young away
from the core; in a syncline the beds
young toward the core.

Answer 6

• Antiform:
• Synform:
• Neutral
  anticline

Question 7

rocks younging
upward.

rocks overturned
and younging
downwards.

Answer 7

Upward-facing:
* Downward-facing:

Question 8

a fold which can be generated by moving the fold axis
parallel to itself. The majority of folds approximate to this form.

a fold which is non-cylindrical and whose folded surface
forms part of a cone.

Answer 8

• Cylindrical fold:
• Conical fold:

Question 9

layers in the fold have
the same amplitude and wavelength.
: some layer in fold
have different wavelengths or
amplitudes.

Answer 9

• Harmonic fold:
• Disharmonic fold

Question 10

is a structural feature that is
formed when planar surfaces are
bent or curved.

Answer 10

A fold