Boudinaged dyke. The black blobs running vertically up and
down the centre of the picture once formed a continuous dyke of material more
competent than the surroundings. During stretching in the vertical direction the
dyke was broken into the pieces seen. The length on the deformed state can be
maeasured directly, the length in the original state can be found by summing the
lengths of the individual pieces. (photo: Rob Butler)
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