THE ENGATONE, 
249 
the deep magnificent gorge of FinstermUnz is cut to 
a depth of 1000 metres. 
Speaking of the lower course of the Inn below 
Landeck, Bonney says, “Of a valley of strike the 
course of the Inn from Landeck to below Jenbach is 
an excellent example. I’he river flows roughly from 
west to east for full 50 miles, bounded on the south 
by the central range of Crystalline rock, on the 
north by the overlying limestones and shales of the 
secondary series. It receives the drainage of many 
considerable lateral valleys from the former, of 
sundry glens from the latter. 'Fhe junction of two 
great rock groups, differing so markedly in their 
powers of resistance, has obviously determined the 
initial course of the river valley, which broadens as 
the stream descends from a height of 2750 feet to 
about 1700 feet.”* 
* 109. Bonney ’s “Growth and Sculpture of the Alps” in 
Tyndall leciiires. Roy. Inst., 1888. 
