The Quarterly journal of the Geological Society of London . ere may still be a transverse solid rock-ridge below ; but it wouldbe difficult, if not impossible, to account for the formation of sucha ridge, and still more difficult to explain the lake. The maximum height of the mass above the present lake-level is200 metres, and there seems no reason to doubt a similar thicknessbelow. The northward extension is also considerably larger thanone would at first suspect. It forms the plain round Laret andthe Schwarzsee, as also the rising ground of Weiden between therailway and the Klosters road; an
The Quarterly journal of the Geological Society of London . ere may still be a transverse solid rock-ridge below ; but it wouldbe difficult, if not impossible, to account for the formation of sucha ridge, and still more difficult to explain the lake. The maximum height of the mass above the present lake-level is200 metres, and there seems no reason to doubt a similar thicknessbelow. The northward extension is also considerably larger thanone would at first suspect. It forms the plain round Laret andthe Schwarzsee, as also the rising ground of Weiden between therailway and the Klosters road; and then is prolonged in a slopingtongue down between the Lareter Bach and the Eiedloch Bach,Only at Seifranga, above Klosters, is the solid rock (limestone andserpentine) met with in the river-bed. From below Laret to thispoint the river runs between the cliffs of gneissose rocks on the east,and the mass of detritus between them and the Schwarzsee. The o oo o o o Q CDO O O O ^ >0 lO <5J C3?£3 ft •OO CO -J CO o. o COO •PO t5 ::»I 2 CO Vol. 54.] THE STRUCTUEE OF THE DAVOS VALLEY. 285 serpentine in situ on the Schwarzsee Alp is ^ mile distant, and thusthere is everj- reason to suppose that the real rock-floor lies farbelow the present stream-bed. Turning now to the southern end of the area, we find the mouthof the Sertig Thai marked by scenic features readily noticed by theleast observant eye. On the eastern side are two great flat-toppedterraces, the Wildboden and the Junkersboden, which present tothe west a very steep bank more than 100 feet in height. Theyare separated by the Sertig Bach, which has cut through themass to the same depth. Eastward the top of the terrace risesgradually past the contour of 1560 metres, and then steeply up toClavadel. This village is also situated on the comparatively leveltop of a mass of superficial deposits : the rock in situ being exposedmany metres above. Looking up the Sertig Thai, the remains of aformer extension of the same deposi
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Keywords: ., bookcentury1800, bookdecade1840, bookidquarte, booksubjectgeology
