Br. M. M. Ogilvie Gordon — Monzoni and Upper Fassa. 315 



of these ripples is quite short, but as the whole area shows north- 

 south cleavage, I consider them confirmatory evidence that the 

 East-Alpine pressure-system acted intermittently or synchronously 

 with the Judicarian-Asta pressures, and that as these pressures 

 temporarily waned after the epoch of crust-slicing and igneous 

 intrusions, the effects of the East-Alpine movement became more 

 pronounced. Whether this explanation be correct or not, the 

 stratigraphy shows that horizontal compression acted along east- 

 west and north-south directions after the epoch of the most intense 

 Judicarian and Asta movements. 



The Contrin and Buchenstein Anticlines. 



The Permian and Werfen strata are widely exposed on the Contrin 

 Alpe, and the essential features in the stratigraphy of the anticline 

 are more easily obtained than in the Pocol and Monzoni Alpes 

 farther west. According to my mapping, the original north limit 

 of the Contrin anticline was an east- west fault through the present 

 Bufaure Massive from Mazzin in Fassa Valley to Penia at the 

 confluence of the Upper Avisio and the Contrin streams, the fault 

 continuing eastward through the Upper Avisio Valley, westward 

 through the Udai Valley. The original south limit of the Contrin 

 anticline was the east-west fault north of the Campagnazza and 

 Monzoni area. The present distance between these two faults is, 

 as the crow flies, about 6f kilometres. 



The Contrin anticline is succeeded on the north by another east- 

 west anticline, that of Upper Fassa. It is the continuation of an 

 anticline to which I previously gave the name of the Buchenstein 

 anticline (Q.J.G.S., 1899, p. 583). In Upper Fassa the Triassic 

 strata belonging to this anticline are exposed in the northern half 

 of Bufaure, in the Upper Fassa slopes, in Eodella Mountain, in the 

 slopes of Mount Donna, in the Sella Pass, and in the southern half 

 ot the Sella and Langkofl mountain-massives. The old east-west 

 fault which forms the original limit of the Contrin anticline on the 

 north, is the southern fault-limit of the Buchenstein and Upper Fassa 

 anticline. The northern fault-limit of the Buchenstein anticline, as 

 demonstrated by me in former papers, passes through the Langkofl 

 and Sella limestone-massives, through Stuores Alpe and the north 

 of Sett Sass, being at the same time the southern fault-limit of the 

 Groden anticline. The distance between the limiting-faults of this 

 anticline in Upper Fassa is the same as the width of the Contrin 

 anticline, viz. 6f kilometres. Both anticlines have undergone 

 cross-deformation in virtue of the superposed Asta-Judicarian 

 movements. In several cases that I have measured, the width of 

 the complete wave-form of the Judicarian cross-movement is in this 

 locality 5^ kilometres. 



The Asta-Judicarian movements have produced a series of over- 

 thrust and downslip crust-slices following strike-curves, and cross- 

 faulted as in the case of Monzoni. The porphyritic sheets have 

 been injected in the downslip shear-zones behind the thrust-masses 

 of Werfen and limestone strata, and in ' Judicarian ' cross-faults ; 



