462 DR. PRELLER ON PLIOCENE CONGLOMERATES [AUg. 1902, 
about 130 metres above the present level of those rivers, which is 
at the 170-metre contour.! 
(5) But the most noteworthy and significant feature as bearing 
on the subject of this paper, consists in the fact that extensive 
deposits of the same conglomerate occur not only on the left of 
the Sadne, but also on the hills crowning the right bank of that 
river and of the Rhone in the immediate vicinity of Lyons. It F 
occurs in extensive deposits on the upper flanks of Mont Or, 
immediately north of Lyons; it overlies the gneiss of the well- 
known hills of Lyons itself, that is, of Fourviére, St. Irénée, and 
Ste. Foye, to a depth of about 20 metres, being overlain, in its turn, 
by 20 to 30 metres of moraine; and it is also met with west of 
Fourviere, on the heights of Ecully, whence it extends to the 
heights above Oullins, on the Rhone, below the junction of the 
Fig. 11.—Section of Alluvion Ancienne, from Oullins to Sathonay, 
near Lyons. 
MOLASSE 
GNEISS 
) 4 R) 
Del. D.R.P. 1: 100,000 
two rivers.?, The contour at which these deposits of the ‘ alluvion 
ancienne’ appear is somewhat lower than that of the deposits of 
Croix Rousse and of the Dombes—namely, 230 to 290 metres. 
The material of all the deposits, both near Lausanne and near 
Lyons, is derived from the Alps, that of the Dombes and Lyons 
deposits being considerably more decomposed: hence the predomi- 
nance of quartzite. 
* The moraine of Croix Rousse and Sathonay, which overlies the con- 
glomerate, abounds in Alpine blocks of enormous size, many of the excavated 
blocks reaching 10 cubic metres, or 25 tons in weight. 
* A branch, if not the whole of the Rhéne and Sadne, formerly passed west 
of Fourviere, that hill, together with St. Irénée and Ste. Foye, forming then 
an island. The confluence of the two rivers appears to have been at one time 
considerably above, at another time considerably below the present junction at 
Lyons. 
