352 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [April 5, 



these latter probably belong, according to the recent investigations of 

 M. Hohenegger, to the Neocomian formation." 



In the same stratigraphical relations, and with fossil corals iden- 

 tical with those found in the group of the Zugspitze and the Wetter- 

 stein, we find the upper Alpine limestone also in the Kahrwendel 

 range, which extends immediately to the east of the Valley of the 

 Tsar, as well as to the north of my geological map, where it appears 

 again in the environs of Ammergau on the Laberberg, and on the 

 Kofel and Sonnenberg. 



VI. Cretaceous Formations. Orhitidite-sandstones. 



The cretaceous strata, characterized by numerous Orbitulites^ do 

 not appear within my map, but occur immediately to the north of 

 it, in the environs of Ammergau. They consist of grey sandstones 

 with a calcareous and marly cement. The latter is sometimes very 

 predominant ; and the mineralogical composition of the rocks varies 

 very much. 



In some strata the quartz and hornstone grains are very predomi- 

 nant, and sometimes attain a considerable size. The rock is then 

 very hard, and the surface becomes very rough and uneven by the 

 effects of weathering. 



Among the fossils the most characteristic are numerous Orhitulites, 

 of which there are at least two distinct species. There has been also 

 found a well-preserved fragment of an Ammonite south of the Rap- 

 penkopf, which, according to Von Hauer, agrees with no known 

 species, and is probably undescribed. Different specimens of Ostrcea, 

 Nerincea, and Turbo occurred south of the Rappenkopf and in the 

 Soile-iVlpe. 



These deposits seem perfectly to agree, as regards their lithological 

 and paleeontological characters, with very similar strata observed by 

 Prof. Emmrich in the Urschelau in the Traun Valley. The latter 

 contain more numerous and better-preserved fossils, and belong 

 evidently to the Upper Cretaceous formation. 



The cretaceous strata are well developed in the basin of the Soile- 

 and Nebele-Alpe between the Laberkopfen and the Ettales JMandl ; 

 they occur also on the southern slope of this mountain range in the 

 Spitzschlaggraben. We find them again on the opposite side of the 

 Amper, on the Rappenkopf, south of the Kofel, and they are pro- 

 longed in a westerly direction to the Brunnberg, and probably still 

 farther. The very complicated structure of the Laberberg and the 

 Brunnberg makes it difficult to follow out exactly the distribution 

 of the cretaceous strata. It is evident, by observations on different 

 spots, that they rest immediately upon the Upper Alpine Limestone. 

 Generally speaking they seem to have been deposited not quite 

 conformably upon the older formations, which had in part been 

 previously cUsturbed. 



By a great general upheaval which took place afterwards, and by 

 many powerful contortions and faults, the cretaceous strata have 

 been brought in many places, as in the Rappenkopf and the Soile- 



