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Published online by Cambridge University Press: 01 May 2009
Mr. Dixon has handed me a small collection of rock specimens from Gavarnie (Hautes Pyrénées) and the district to the east. Microscopic sections have been made of these, with the object of ascertaining whether the structures and composition of the rocks throw any light on the vexed question of the age of the metamorphism in the two areas specially dealt with in the preceding communication.
1 The flattened termination of X is intended to show the rapid increase of texture just at the margin of a big intrusion.