FIELD NOTES IN SWITZEELAND

453

Heim ( Gletscherkunde , p. 359) treats of the same thing,and refers to Seve’s conclusion that medial moraines may havebeen raised up.

Inteelaken

[The two lakes of Thun and Brienz , once connected, lie in anold pre-glacial valley whose outlet has been filled by drift.Many boulders of granitic gneiss, gneissic granite, &c., lie aboutInterlaken, being derived from the inner part of the BerneseOberland .

On the road to St. Beatenberg, on the north side of LakeThun , I observed a fine morainic mass of till heaped up on theside of the mountain.

This till is full of boulders, many of them striated and oftenof large size. The mass of till is very deep (over 100 feet), andis well exposed in several ravines at a height of 3,800 feet, beingover 1,900 feet above Interlaken .

It contains large boulders of syenite, granite, &c., broughtfrom the Jungfrau region, which are scattered among the morenumerous boulders of local origin—all embedded in glacialclay and often scratched. It appears to be a fine terminalmoraine heaped up on the southern slope of the mountain by theglacier which filled the valley. In a ravine at the bend of theroad is a fine exposure of till, full of boulders, often striated,in which, however, I could find no granite or gneiss, althoughsomewhat lower down both are said to be abundant. I foundboulders of protogene gneiss, abundant above Stechelberg, at thehead of the Lauterbrunnen Valley ; near Miirren jurassic lime-stone and cretaceous shale outcrop.]

Lucebne

[The Lion of Lucerne is cut in soft sandstone (molasse), inwhich is a narrow baud of nummulitic rock which appears at the‘ Glacier Garden .’

Magnificent pot-holes occur here, also erratics, and striatedrock surfaces. Here also, as a rule, the broader ends of scratchesare toward the direction of motion : i.e. to the north.

The Rigi is made of a great thickness of miocene conglomerate(‘ Nagelfluh polygentian ’). The pebbles are of limestone, redgranite, sandstone, &c.