214 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [DeC. 13, 



when I add ^, that it is immediately to the north of a grand line of 

 fault, by which the whole system of the flysch and nummulite rocks 

 is brought in its southern flank against the neocomian limestone 

 (see fig. 19) (in precisely the same unconformable relations as at Dorn- 

 birn and Haslach, south of Bregenz), there may be less difficulty in 

 adopting this solution. At all events, the conversion of flysch into 

 gneiss and mica schist is, as before stated, a pheenomenon in the 

 Grisons insisted on by M. Studer himself, and a partial exhibition of 

 such metamorphism in the Bolghen may therefore reasonably be ad- 

 mitted. 



Prolongation of the Cretaceous and Numinulitic zones of Switzer- 

 land and Bavaria into the Austinan Alps. 



Taking the strata of Appenzell and those of the Grimten and Sont- 

 hofen as types, the practised geologist will have little difficulty in adapt- 

 ing to them the descriptions of the sections of the Alp Spitz near Nes- 

 selwang, the banks of the Traun, Kressenberg, Untersberg, Matt- 

 see f and Pancratz, as given by Prof. Sedgwick and myself. Thus, at 

 the Alp Spitz, near Nesselwang, to the east of the Griinten and on the 

 edge of the Bavarian Alps, there is clearly a cretaceous succession, the 

 extent and details of which must be hereafter worked out. But in the 

 meantime, and in reference to our former section, it appears clear that 

 the northern flank of that mountain presents an escarpment in which 

 strata, with fossils of the greensand and gault (if not neocomian), are 

 brought into contact mth the same tertiary conglomerates as at the 

 Griinten (molasse and nagelflue)^. To the south, or towards the 

 Alps, the younger strata of "flysch," &c., are thrown off from these 

 greensands and cretaceous rocks, the most southern of which is evi- 

 dently a representative of the chalk. 



In the section of the Traunstein there is pretty much the 

 same expansion of a system of sandstone and shale and impure lime- 

 stone with several courses of nummuhtes, &c. §, as that which has 



* M. Boue has described the ciystalline mining tract east of the valley of the 

 Iller, which is in truth a prolongation of these masses. 



t The fossils which I formerly collected at Mattsee having been examined by 

 M. D'Archiac, are pronounced by him to be Nmnmulites Biaritzana (D'Arch.) 

 {N. atacica, Leym.), so common in the Lower Pyrenees, the Corbieres, and the 

 Lower French Alps ; N. rotularis ? Desh. {N. globulus, Leym,), of the Corbieres 

 and the Crimaea ; Orbitolites submedia (D'Arch.) of Biaritz and the Lower Alps ; 

 Opercuhna, n. s. ; Echinolampas, probably the E. elUpsoidalis (D'Arch.) of Biaritz ; 

 and among the Pectens one species closely resembles the P. tripartitus (Desh.) so 

 well known in the tertiary rocks of France. Identifying these beds witli those of 

 Kressenberg (see the Bulletin of the Vienna Society, 1848, vol. iv. pp. 267, 269, 

 and Leonhard's Jahrbuch, 1849, p. 109), M. Erhlich has cited from them the 

 Nautilus Ungidatus, Clypeaster {Conoclypus) conoideus, C. Bouei, and the Micraster 

 pulvinatus (D'Arch.). As 1 formerly found such Echinoderms at Mattsee, though 

 at that time they were without names, there can be no sort of doubt of the age 

 of the rock ; the Gryphaea of the lowest beds being the only secondary form. 



X Trans. Geol. Soc. Lond. vol. iii. p. 337. plate 36. fig. 5. The section is so 

 drawn that the tertiary conglomerates appear to be conformable to the cretaceous 

 masses. This is an en-or. 



§ Geol. Trans, vol. iii. p. 338-9, pi. 36. fig. 6. 



