¹ It is by virtue of this fan structure that the relatively recent date of the “lustrous schists” can be demonstrated. Throughout almost the entire range of these schists order of superposition proves nothing, because the structure is uniclinal. Fortunately certain great patches are still left on the summit of the fan. Thus not only is evidence of superposition perfectly clear, but it is such as to allow no other interpretation.

² There would be, it is true, an important exception if the massifs of Annes, the Chablais, the Faulhorn, and the north fold of Glarus are, as is usually maintained, true anticlinal masses. This exception would disappear if they are overthrust masses. Thanks to the work of M. Schardt, attention is now definitely drawn to this problem, which I believe to be on the eve of solution.