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位于圣米歇尔－德莫里耶讷和莫达讷之间的阿尔克河谷右岸发生了许多巨型滑坡。受其影响的主要有贯穿阿尔卑斯山脉西部因易发生各类大小边坡运动而出名的“布里扬松（Ｂｒｉａｎｃｏｎｎａｉｓ）相带”含煤岩系。文中阐述了３个主要滑坡：普塞特（Ｐｏｕｃｅｔ）滑坡、费兰孔泽（Ｆｒａｎｃｏｚ）滑坡和博维尔拉德（Ｂｏｎｖｉｌｌａｒｄ）滑坡。其中２个滑坡从高山脊延伸至河谷，高差达１４００～１７００ｍ。地球物理测量和结合勘探提供了这些滑坡厚度的大量信息，且证明了这些滑坡基本属于板状类型。
There are many giant landslides on the right bank of the Ark Valley between Saint-Michel-de-Mauriène and Modane. Mainly affected by the “Brianconnais facies” coal-bearing rocks known throughout the western Alps for their large and small slopes. The article describes three major landslides: the Poucet landslide, the Francoz landslide and the Bonvillard landslide. Two of the landslides extend from the high ridge to the valley with a height of 1400-1700 m. Geophysical surveys and combined exploration provide a wealth of information on these landslide thicknesses and prove that these landslides are largely of the plate type.