Folds

Question 1

fold superposition (overprinting)

Answer 1

3 generations of folds (F1, F2, F3)
F1 oldest, F3 youngest
lowest number is the earliest event
later folds overprint earlier generations

Question 2

Fold style: Characteristics of a fold

Answer 2

1.shape of the fold in profile (e.g. parallel or similar, interlimb angle etc.)

2.presence / absence of an axial plane foliation

3. type of axial plane foliation
4. cylindrical or not

Different generations of folds have different styles
-> fold style is used to differentiate folds of different generations.

note: Fold orientation and vergence are not style criteria, but they can be useful in differentiating folds of different generations

Question 3

Fold interference pattern – type 0

Question 4

Fold interference pattern - Type 1 - “dome and basin”

Question 5

Fold interference pattern – Type 2 “mushroom”