Figure G-36 (Appendix G) contains four photographs of slabs of a breccia from the Alps. The sample in photograph G-36a is undeformed; Fig. G-36b–d show slabs of this same breccia from nearby localities where it has been deformed. The scale is the same in all photographs.

On each of the three photographs of the deformed breccia, measure the long and short axis of at least five clasts. Calculate the mean for each axis to determine the 1 + e₁: 1 + e₂ ratio of the strain ellipse. Write the ratio in the space provided below each photograph.

Next to each photograph is a square. A circle has been drawn in the square adjacent to the undeformed sample. Within each of the other three squares sketch a properly proportioned strain ellipse for the rock sample.

Transcribed Image Text:

a 1 + e₁: 1+ e2=1.0: 1.0 a b 1 + €1: 1+ e₂= :