Pull apart basin model

Caption: "Pull-apart basin developed between right-stepping, right-lateral strike-slip faults."
From Physical Analog Modeling.
Seems to have a very similar geometry to the feature in question.
Space/Science » in reply to This is just a guess:

Caption: "Pull-apart basin developed between right-stepping, right-lateral strike-slip faults."
From Physical Analog Modeling.
Seems to have a very similar geometry to the feature in question.