36 GEOLOGICAL MEMOIRS. 



notably different from the genuine Werfen strata. At the same 

 places also powerful masses of limestone of the cretaceous period, 

 form a secondary zone, exterior to the liassic rocks, in contradistinc- 

 tion to the conditions obtaining in the Austrian x\lps. 



The tertiary deposits of the Vorarlberg have been upheaved, like 

 those of Switzerland. M. Escher von der Linth's hypothesis of the 

 Vorarlberg flysch being an eocene deposit is probably correct, both 

 on account of its northern range being between the cretaceous rocks 

 and the molasse, and because its southern range separates the cre- 

 taceous rocks from the Alpine limestone proper. The cretaceous 

 group, surrounded by both these lines, is heaved up in a series of 

 regular anticlinals. The largest of these, that of Canisfluh near 

 Au, is fissured to such a depth that lower Jurassic rocks are seen 

 coming out from beneath the cretaceous. 



Remarkable vestiges of ancient glaciers (already noticed by M. 

 Guyot) occur along the whole course of the Rhine within the 

 Austrian territory, as far as the neighbourhood of Bregenz. 



In his excursion to the Salzberg, M. Suess ascertained that at 

 different points there is an alternation of the St. Cassian beds with 

 the sandstone which is regarded by the Swiss geologists as belonging 

 to the Keuper. [Count M.] 



Notice of the Occurrence of an Earthquake at Schemnitz, 

 Hungary. By M. Russegger, Director of the Mines of Lower 

 Hungary. 

 [Proceedings of the Imperial Academy of Sciences of Vienna, Oct. 5, 1854.] 



On September 16, 1854, at 5 o'clock a.m. (mean time), says the 

 author, I was awakened by a report like that of cannon, which was 

 also heard by all the inhabitants of the building occupied by the 

 Mining Administration, and by the sentinel in front of it. All 

 these persons simultaneously felt a shock and perceived the furni- 

 ture and other objects suddenly and violently shaken. An inhabi- 

 tant of the ground-floor thought that a subterranean vault had 

 suddenly fallen in. In the town of Schemnitz itself the shock was 

 felt in the direction of the principal metalliferous vein (Spitaler 

 Hauptgang), and on both sides of this line. It was not felt at 

 Windschacht, situated on the S.W. part of the vein, but its (probably 

 secondary) effects were sensibly felt, though considerably less in 

 force, along the N.E. prolongation of the vein, where it enters the 

 private mining territory of Michaelisstollen. 



The shock and report were of greater intensity in the mines than 

 at the surface immediately above the workings in the principal vein. 

 All who perceived the report stated that it seemed to come from 

 underground, and the shock too appears to have acted vertically 

 from below upwards. The supposition that the phsenomenon arose 

 from the falling in of abandoned excavations in the mines is inadmis- 

 sible to any one acquainted with the method by which mineral veins, 

 especially in the Schemnitz district, are usually worked. Moreover, 

 the observations made in the interior of the mines prove that the 



