Structure of the Austrian Alps, fye. 107 



tertiary groups. In other places the calcareous beds of these 

 outer ridges are of much greater thickness, and they then ex- 

 hibit all the usual mineralogical characters of Alpine limestone. 



The Kachel-stein (immediately south of the iron works of 

 Kressenberg, near Teisendorf) exhibits the following cha- 

 racteristic succession. (1.) Light-gray, calcareous marls with 

 indurated bands resembling planer-hoik. (2.) Blueish, mica- 

 ceous marls with calcareous bands, some of which are com- 

 posed of calc-grit; others of compact, argillaceous limestone 

 resembling blue and white lias. (3.) A great series of blueish 

 gray flag-stones, alternating with marls, generally blue, but 

 here and there of red or greenish red colours. (4-.) Micaceous 

 sandstone, mostly thin-bedded, and of a greenish gray colour, 

 but containing some thick beds extensively quarried for build- 

 ing. Some of the calcareous bands of this lofty ridge contain 

 Ammonites, and Belemnites ; and it appears to be separated by 

 a double system of faults, on one side from the metalliferous 

 mountains of Alpine limestone, and on the other from the 

 newer ferriferous strata of the Kressenberg*. 



In the Alpen Spitz immediately south of Nesselwang, beds 

 of compact limestone, with many Belemnites, occasionally 

 passing into a more earthy texture (like indurated planer-halk) 

 and containing balls of pyrites, alternate with bands of calc- 

 grit and thick beds of dark-coloured shale. 



In some instances the rocks of this system exhibit the ordi- 

 nary characters of the green-sand of England. Thus at Son- 

 thofen the iron-sand is not distinguishable in mineral character 

 from the lower green-sand of the Kentish denudation; and it 

 contains many fossils, among which we may enumerate Am- 

 monites, Belemnites, Inocerami(?), Nummulites, Pectens, Te- 

 rebratulae, numerous Crustacea, &c. &c. We had no hesitation 

 in considering this deposit as subordinate to the higher part 

 of the younger Alpine limestone, and therefore secondaryf. 



At Haslach, a few miles south of Bregenz, there is a de- 

 posit of red oxide of iron in beds of calcareous shale, alterna- 

 ting with beds of calc-grit and limestone, some of which are 

 of a bright green colour. The series seems to pass under 

 great precipices of Alpine limestone much charged with Num- 

 mulites. At Oberdorf, in the immediate neighbourhood, is a 



* We have the authority of the Berg-Meister, who has many years 

 superintended the iron works, for asserting (in confirmation of the pub- 

 lished statements of Count Munster), that the Kressenberg beds contain 

 no Ammonites or Belemnites. In our opinion the formations of the Kachel- 

 stein and Kressenberg, though in close contact, ought not to be confounded. 



■f Dr. Bou£ has erroneously stated, in different journals, that we had con- 

 sidered the Sonthofen deposit as tertiary. 



P 2 nummulite- 



