Exercise 11‌‌

Consider the fractures in the photograph below and the corresponding sketch. The fractures belong to two sets with the same strike but with opposite dips: one set dips toward NW and the other toward SE. Answer the following questions:

a) What type of pattern do the fractures form and under what tectonic regime were they generated?

b) What was the orientation of the main stresses and what type are these fractures?

c) What does this fracture pattern imply for the connected network and flow?

Photograph from Suzano, São Paulo, Brazil, by Amélia Fernandes

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