154 



Mr Kynaston, Contributions to the Geology of [Feb. 12, 



they also extend up the tributary valley of the Randaubach as 

 far as Neu Alp, between the Gamsfeld and the Hohe Flatten. 

 The beds themselves consist of conglomerates, thin limestones, 

 bluish and greyish marls, bluish sandstones and flaggy beds, and 

 red and grey sandy marls. The average dip of the series is 

 South, and varies from almost horizontal up to an angle of about 

 50°. The beds of Russbachthal are more disturbed than those 

 of Gosau Thai. The total thickness of the group probably does 

 not fall far short of 3000 feet. The following classification was 

 found to be the most convenient : — 



(\. Grey, red, and vm^iegated sandy marls, here and 

 there, especially towards the upper part, alter- 

 nating with sandstones, grits, and conglomerates. 

 Well seen on the sides of the Horn, Hennarkogl, 

 and Zwiesel Alp. 



2. Grey sandstones and flags, with some sandy shales, 

 with obscure plant remains, worm-tracks, and 

 ripple-marks. Well seen on sides of Ressenberg, 

 and below Bibereck Alp. 



Upper 

 Gosau Beds. "\ 



Lower ; 

 Gosau. Beds. "\ 



''3. Bluish-grey marls, with some limestones ; very fossili- 

 ferous. Hippurites organisans. Reef-building 

 Corals, Gasteropods, Lamellibrauchs, &c. 



Estuarine beds of Neu Alp. 



la. Limestone with Nerinsea — Traunwand, Neu Alp. 



h. ,, ,, Actseonella — Traunwand. 



„ ,, Hippurites cornuvacciuum — 



5- < Traunwand, &c. 



d. Coarse conglomerate, forming basement bed, some- 

 times alternating with grits, sandstones, and 

 marls. 



The Gosau beds of this district bear a marked correspondence, 

 both in lithological and palseontological characteristics, with beds 

 of the same age in other localities in the Eastern Alps, such as 

 Neue Welt near Wiener Neustadt, Hieflau, Gamsthal, Zlam, &c. 



The Lower Gosau beds contain a remarkably rich and varied 

 fauna; the upper beds, however, in the Gosau Valley are mo- 

 notonous and barren, the only organic remains present being 

 represented by obscure worm-tracks and vegetable remains. The 

 fossils of the lower beds have been described by Reuss, Zittel, 

 Zekeli, Stoliczka, and Von Hauer. 



Most of the fossils occur in the fossiliferous marl series, while 

 a good many are found in the Estuarine group and the limestone 

 beds below it. Hippurites are extremely abundant, and build 



