Geology and Mineralogy. 73 
4, Accumulation of stream detritus nearly to the base of the 
tingen breccia; re-excavation of the Inn valley to its 
previous depth. 
5. Advent of the last glaciation ; deposition of the laminated 
cla of Arzl, and of the coal of Miihlau; accumulation of 
the basal aincial deposits overlying the Hattingen breccia ; 
development of moraines on the heights, and of terraces on 
the valley pc with retreat of the 
6. Erosion of the Inn valley; excavation of ravines within and 
spate of — _— upon cig terraces (p. 243 
Thu 
‘ Iller valley, near I iri erg, exposes a ground moraine 40-60 m. 
thick restin on cemented iiginmnetath of Ios materials, 
ated clay some 8 m. thick, teh aca flattened sticks and twigs. 
Below all, lies a ground moraine, filled with scratched bowlders 
and pebbles, 10 m. thick. This abasic and the coincident pheno- 
na in nti parts of the Iller valley indicate the following 
course of eve 
1. The rally ben filled with glaciers which, in the vicinity of 
Sont Dey ended to within 900 m. above sea level. 
Tem ee oot ure 
ts remains aesiunuinted in two coal-seams whose maximum 
thickness exceeds 3 which sccomalatior of vegeta tal 
matter could only ies aap sc place during a long period. 
he coal-seams became covered with gravel-beds 
4. The [ler valley was excavated to a depth ‘of 210 to 220 m. Tem- 
perature remained high. 
The ae expended : second time. The temperature again 
61). 
fell (p. 2 
milarly, the protean deposit long known as “ Alpine diluviam” 
1s some bipartite in structure. e r and newer ivi- 
with 
which it is conveniently designated, has no ee equivalent). 
The lower shite older div ision—the « diluviale 
Pal - isions; and in some localities thes 
processes were eo 
ed by a ‘short period of dispersion ra deposition of fe a8 
