boudinage, but, hey, it's in blueschist, so there's your geo-pun for the day. Boudinage forms when two components of a strained rock have different competencies, with one more plastic, the other less so. The more plastic component tends to deform more easily, shearing due to the stress it experiences, while the other tends to deform more brittley, breaking up into discrete blocks and pieces. There are a large number of boudins visible in the above photo, and I've annotated just a few below to help clarify the idea for those not familiar with it.
Photo unmodified. March 9, 2012. FlashEarth location.
Is This Your Hat?
2 years ago