Fig. 9

Rock avalanche deposit at outcrop. A Dark gray brecciated limestone near the base of the Flims rock avalanche deposit at the locality Islaplanggen (coord. 2744250/118350). The photograph taken in winter shows icicles emanating from several point sources within the black limestone. Light colored scree outcrops in steep narrow gullies. B) Detailed view of dark gray brecciated limestone at the confluence of Rabiusa and Vorderrhein (coord. 2744350/1185350). A ca. 10 cm thick breccia layer (double arrows) with centimeter scale components in a fine-grained comminuted white limestone matrix cuts across highly fractured limestone (Quinten Limestone). Fracturing and comminution are also responsible for the occurrence of small pockets of comminuted white limestone within the fractured limestone. All in all the rock fabric is indicative for a cataclasite. C Gray fractured limestone cataclasite in the cliff 400 m WSW of the railroad station Versam-Safien (coord. 2742550/1185500). The photograph on the left shows a “block-in-powder” texture with angular blocks in a comminuted limestone matrix. The photograph on the right shows a vertical fault with a white fault gouge (double arrows) consisting of comminuted limestone. Photos A. Pfiffner. D Large fragmented compartments in the lower reaches of the Versamertobel (coord. 2745330/1185240). A large compartment with original bedding (arrows) is visible below the road and a large compartment with folds above the road. A sharp contact separates the latter on the left from a cataclasite (cc) with “block-in-powder” texture. Photo courtesy M. Weidmann