STRATIGRAPHICAL GEOLOGY. 465 



its numerous sections and correct fundamental conceptions of 

 the tectonic relations of the various groups of strata, their 

 Sketch of the Structure of the Eastern Alps provided the first 

 intelligible wayboard for the student of the geology of the Tyrol, 

 and was recognised as the starting-point of further research. 



Excellent special sections were worked out by Lill von 

 Lilienbach in the Salza Valley from Bischofshofen and Werfen 

 to Teisendorf (1830), and from Werfen weng through the 

 Tannen Range to Mattsee (1833). These afforded a true 

 representation of the stratigraphical succession of the rock- 

 groups which compose the northern limestone Alps, but Lill 

 went far astray in the vague attempts which he made to 

 identify the Alpine rocks with extra-Alpine formations. One 

 of his most noteworthy contributions was his careful deter- 

 mination of the guiding thread supplied by the reddish and 

 greenish " Werfen " shales, whose name is taken from their 

 typical development at Werfen in that area. Lill traced them 

 everywhere as the basis of the Alpine limestone, but he 

 erroneously assigned them and a considerable part of the 

 limestone to the Wernerian "transitional" series (ante, p. 58). 

 Lill's chief stratigraphical results may be summarised in tabular 

 form : 



Upper Alpine Limestone, comprising the "Hippurite" lime- 

 stone of Untersberg, etc. 



f Shales and sandstones with clays, 



,,.,,, AJ . . T . . gypsum, and the salt deposits of 



Ahdd/e Alpine Limestone \ g^ . Berchtesgaden, Hall- 

 (regarded as Jurass,c). | ^ ^ d A J. R ' oss feld 

 \ and Schellenberg strata. 



T A1 .. T-- fRed marble of the Diirnberg ; 



Lower A pine ^ Limestone, 8 > 



doubtfully indicated as . limestone and dolo- 



transitional forma- miteoft h e Watzmann, Tannen, 



( and the Hohe G611 groups. 



Werfen Shales with interbedded gypsum (regarded by Lill 

 as a " transitional " formation). 



H. G. Bronn examined the fossils collected by Lill, and in 

 a supplementary paper to Lill's in the Neues Jahrbuch (1831), 

 emphasised the unusual character of the fauna of Ammonites 

 and Monotis present in the Diirnberg limestone, and its ap- 

 parent affinities with Liassic and Transitional marine faunas. 



3 



