Vol. 58.] IN SUBALPINE FRANCE AND SWITZERLAND. 451 
Alps, the first links in that chain are the extensive deposits of the 
Lorze Valley near Zug, of the Sihl Valley between the Zug and 
Zurich lake-basins, and of Altschloss and Gehren near Wiidenswil, 
on the hills flanking the Lake of Zurich. All these three deposits 
lie in a synclinal fold or zonal subsidence which occurred subse- 
quently to their formation, and to which the lake-basins along the 
base of the Alps owe their existence. 
The next links in the chain are the deposits on the Albis range 
of hills flanking the Lake of Zurich, including the classic deposit on 
the summit of the Uetliberg; and upon these follow the deposits 
on the Heitersberg hills, of Teufelskeller and Baldegg near Baden, 
and of the Gebensdorfer Horn near Turgi. Of these last-named 
three deposits, that of Teufeiskeller again lies in a synclinal fold of 
the Molasse, which occurred subsequently to the formation of that 
deposit, that is, at the time of the raising of the Jurassic Ligern 
ridge as the result of the last thrusting and folding of the Jura 
range, of which the Liagern is an offshoot crossing the Limmat 
Valley almost at right-angles. 
It is a noteworthy fact that, of all these deposits of Decken- 
schotter, only those of the Lorze Valley, of the Albis, and of the 
Uethberg rest upon moraine, while those from the Uetliberg down- 
ward to the Gebensdorfer Horn rest directly upon Molasse; thus 
showing that the Pliocene glaciation in that district probably did 
not extend beyond the Uetliberg.’ 
(2) Having thus given a short summary of the Deckenschotter 
deposits already dealt with in my previous paper, I now pass to 
the deposits which I have more recently examined. In briefly 
reviewing these, I need not recapitulate the leading characteristics 
of the Deckenschotter or Pliocene conglomerate, as distinguished 
from the Miocene Nagelfluh on the one hand, and the Pleistocene 
gravels and loose conglomerates on the other, since these charac- 
teristics were fully described in my previous papers.” 
(3) At the confluence of the rivers Aare, Reuss, and Limmat, near 
Brugg and Turgi, there occur, opposite the Gebensdorfer Horn, — 
which forms a wedge between the Reuss and the Limmat, two 
extensive Deckenschotter deposits—one on the Bruggerberg, on 
the left of the Aare, and the other on the Siggenberg, on the right 
of the Limmat. In both cases the Deckenschotter, from 30 to 
50 metres * in depth, and overlain by moraine, rests directly upon 
1 Prof. Miuhlberg, of Aarau, mentions a deposit of old Glacial gravel in the 
valley of the Wyna, an affluent of the Aare, on a cliff called the § Wandfluh, 
near Zezwyl, the conglomerate resting upon Molasse and being overlain by 
moraine at an altitude of 700 metres (Festschrift, Aarau, 1869, p. 96). This 
deposit, which I have examined, occurs in a line with the Uetliberg Decken- 
schotter, and is probably of the same age as the latter. 
* Quart. Journ. Geol. Soc. vol. li (1895) pp. 3869 ez segg., & vol. lii (1896) 
pp- 556 eé seqq. 
3 The depths of the various deposits and all the altitudes in the present 
paper are given in metres, as they correspond with the Swiss contour-map 
on the 1 : 25,000 scale. 
