1848.] 



MURCHISON ON THE STRUCTURE OF THE ALPS. 



259 



53 N— 



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the north, but with many undulations and 

 fractures, and in them the following fossils 

 are found, as identified byM. Zeuschner: — 

 AmmonitesWalcotti, A. Bucklandi, A. an- 

 nularis. Nautilus acutus (V. Buch), Be- 

 lemnites digitalis, Terebratula biplicatay 

 Spirifer TFalcotti, S. rosti'atus, with Ap- 

 tychi, Cidarites, Pentacrinites, and some 

 remains of ichthyolites. This group of 

 fossils leaves no doubt, 

 stones containing them 

 liasso-jurassic limestones, 

 between the spots where these 

 are collected and the outer 



that the lime- 

 belong to the 

 In the interval 

 fossils 

 of the 



edge 

 Tatra, there are other limestones in a 

 more or less crystalline state, w^hich, 

 compressed by high inclination into a 

 small horizontal distance, are difficult of 

 access on account of dense woods and their 

 rugged outline. To these I cannot pretend 

 to assign a precise age. On their flank, 

 and particularly on the left bank of the 

 Biala Dujanec, where that stream issues 

 from the gorge of Zagopane, they are un- 

 conformably and irregularly covered by a 

 band of nummulitic limestone (/"), which 

 dips off at an angle of 35° to 40° and 

 passes under a portion of certain schists, 

 sandstones and impure limestones {g), 

 which occupy a portion of the hilly tract 

 extending northwards to the valley of Neu- 

 markt. This nummulite limestone is thick- 

 bedded, of grey colour, in part a coarse cal- 

 careous grit, and even a small conglomerate 

 made up of fragments of the underlying 

 limestones, and is much charged with mag- 

 nesia. It contains nummulites throughout 

 a thickness of upwards of 100 feet, but most 

 abundantly in the upper beds. Among 

 these, besides the Nummulina globulus, 

 Leym. ?, there is the large species N. 

 planospira ?, so common in the Alps and 

 elsewhere ; and these typical fossils are 

 also, as in many other regions cited, asso- 

 ciated with certain pectens, ostreae, &c., 

 •auoqisanin and large echinoderms, &c. In short, the 

 P3j3?tv fQggji assemblage of genera and forms is 

 so precisely the same as that seen in the 

 %■% supracretaceous nummulitic rocks of the 

 I ;f Alps, that no doubt can exist as to the age 



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