A. VaiKjhan Jennings — Geology of Bad Nauheim. 349 



of part of the Scblern Dolomite, comprising a gradual transition from 

 a typical Stuores-Cassiaa fauna to the ' Travenanzes ' Raibl fauna of 

 the Falzarego district. 



(2) The Wengen and Stuores-Cassian fossiliferous tufaceous series 

 are present throughout the district of Enneberg and Ampezzo in 

 complete zonal development. These palaeontological zones are 

 therefore not, as has been said, the tufaceous facies of the dolomitic 

 rock composing the massives in these areas. On the other hand, the 

 Upper Cassian zone and the higher Raibl zones are developed in 

 varying degree loithln Enneberg and Ampezzo as local facies of local 

 dolomitic sediments. ' Cipit Limestones ' (the true coral-reefs of the 

 district) occur both in the tufaceous and in the dolomitic facies at 

 all horizons as occasional local beds of comparatively small thickness 

 (loc. cit., Geol. Mag., 1894). 



(3) The Wengen and Stuores-Cassian tufaceous and calcareous 

 series of Enneberg and Ampezzo represent time-equivalents of part 

 of the calcareo-dolomitic series south of the Buchenstein-Mahlknecht 

 passage-area of facies, that area having been one of the chief localities 

 of contemporaneous eruptive fracture-planes. 



(4) In many cases thfe passage-areas between facies of different 

 lithological character, as well as the passage-bands between sub- 

 jacent rock-groups of different lithological character, have been the 

 seat of subsequent differential movement or distortion. So that the 

 complex local developments of passage-areas and passage-bands in 

 the tjpper Trias of South Tyrol have induced many local effects of 

 cross - movement which now complicate the stratigraphy of that 

 district. 



(5) The more general movements associated with Cretaceous- 

 Tertiai'y upheaval in the Eastern Alps have called forth an east- 

 west strike, which must be regarded as fundamental in the district, 

 and also a cross-compression from east and west or slightly oblique 

 directions. The complex resultant system of folds, faults, and 

 overthrusts has been, cut by subsequent faults associated with local 

 subsidences. 



IL' — The Geology of Bad Nauheim and its Thermal Salt- 

 Springs. 

 By A. Valghax Jexnings, F.L.S., F.G.S. 



I. Introductiou. 

 II. General Physiography. 



III. The Rock-Formations present. 



IV. The Springs, Borings, and ' Salines.' 

 V. The Geological Problems involved. 



I. Introduction. 



THE eastern extremity of the wooded range of the Taunus, where 

 its last spurs slope down to the Wetterau Plain and the 

 streams from its valleys give up hurrying and wander lazily 

 across the fertile flats towards the Main, has been a spot rich in 

 interest since at least pre-Germanic times. The ancient Kelts, when 



