124 MB. H. XYNASTON ON THE [May 1 894, 



tion in the Eastern Alps, and chiefly on the northern flanks of the 

 chain. They nearly always occnr in basin-shaped or trough-shaped 

 areas in the Alpine limestone, similar to that of which the Gosau- 

 thal may be taken as a fair type, or in small, narrow, high-lying 

 valleys, resembling that of Zlam, near Aussee, in Styria. As 

 before mentioned, they generally flank the northern zone of Alpine 

 limestone (Kalkalpenzone), with, however, the exception of the one 

 locality of Obersiegsdorf, 1 south-east of the Chiem See in Bavaria ; 

 but they never encroach on the central axial portion of the chain. 



Everywhere they occur in the form of isolated outliers, resting 

 unconformably on the older Alpine Trias, and they are never 

 associated with either younger or older Cretaceous beds, with one 

 exception, namely near Buhpolting l in Bavaria, west of Salzburg, 

 where they are exposed resting on beds of the age of the Gault. 

 The beds of the Gosauthal are not confined to that valley, but, con- 

 stituting as they do the whole of the hills on its western side, from 

 the Zwiesel Alp on the south to the southern slopes of the Bussberg 

 on the north, they are continued into the adjoining valley of Buss- 

 bach as far west as a mile or so south-west of Bussbachsag, and 

 they also extend up the tributary valley of the Bandoa Bach as far 

 as Neue Alp, between the Gamsfeldand the Hohe Blatten. Farther 

 west they are again seen in the neighbourhood of Abtenau, at the 

 Untersberg, and at other places in the neighbourhood of Salzburg. 



West of Salzburg the Gosau Beds occur at Urschlauer Achen, 

 near Buhpolting, Obersiegsdorf, and other localities in the south of 

 Bavaria. In the Tyrol they have been described by Bichler 2 in the 

 Brandenberger Thai. 



North of the Gosau Valley we find the Gosau Beds in the basin of 

 St. Wolfgang, which commences at St. Gilgen and extends as far as 

 Ischl ; this locality has been described by Dr. A. E. Beuss. 3 

 Probably one of the most important and best known localities for 

 the Gosau Beds is that of Neue Welt, near Wiener Neustadt, south 

 of Vienna, where they occur in a typical basin in the older Alpine 

 limestones, in the neighbourhood of the villages of Piesting, Griin- 

 bach, Dreistatten, and Miithmannsdorf. The strata here exposed 

 have been well described by Sedgwick and Murchison, 4 Czjzek, 5 and 

 Zittel. 6 Other localities are the Gamsthal, near Hieflau, in Styria, 

 described by Peters 7 and Bedtenbacher, s and that of Zlam, near 

 Aussee (also in Styria), described by Peters, 7 and more briefly by 

 Sedgwick and Murchison. 4 



More recently a new locality for the Gosau Beds has been de- 



1 Zittel, Denkscbrift. d. kaiserl. Akad. Wissensch. Wien, vol. xxv. (1866) 

 p. 162. 



2 Jabrb. d. k. k. geol. Eeichstanst. vol. vii. (1856) p. 735. 



3 ' Beitrage zur Charakteristik der Kreidescbicbten in den Ostalpen,' Denk- 

 scbrift. d. kaiserl. Akad. Wissenscb. Wien, vol. vii. (1854) p. 1. 



4 Trans. Geol. Soc. ser. 2, vol. iii. pt. ii. (1832) p. 364. 



5 Jabrb. d. k. k. geol. Reicbsanst. vol. ii. (1851) p. 144. 



Denkscbrift. d. kaiserl. Akad. Wissenscb. Wien, vol. xxv. (1866) p. 160. 



7 Abbandl. d. k. k. geol. Reiehsanst. vol. i. (1852) pt. i. 



8 Jabrb. d. k. k. geol. Eeicbsanst. vol. xxiv. (1874) pp, 1-6. 



