GLACIAL GEOLOGY OF GREAT BRITAIN

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boulders of the gneiss which Baltzer has describedas forming the contact between the limestoneand gneiss in the region south of Meiringen andGrindelwald .

The moraines between Giimlingen and Worb are in the form of ridges, many of which aremade of a series of elongated hummocks, shapedlike drumlins, and steepest at their northern ends.They are ‘ roches moutonnees ’ of till.

A series of ridges and terraces, and an old lakenow filled with peat, 8 feet deep at least, occurabout Ivonolfingen, the abundance of peat remind-ing one of Ireland .]

Menzingbn

[I drive from Zug to Neuheim , via Baar, thenceto Menzingen, returning to Zug via Allemvinden.

High up on the mountain, at Hinterberg, is agreat moraine. Heaped up in huge conical hills,the moraine here on top of the mountain is morestriking than I have seen it anywhere in theworld. It is composed of coarsely stratified till.

The scratches have disappeared from thepebbles, which have otherwise the shape of thosein true till. It is a washed medial moraine, nota kame.

Although so sandy and washed, I find striatederratics and many perfectly angular fragmentsin it.

This last is characteristic of moraines, anddoes not occur in Nagelfluh, or in terraces orkaraes. Great rounded masses of genuine clayeytill, full of scratched pebbles, occur, imbedded init like boulders.

Such a till boulder, G feet in diameter, wasseen in the moraine at Menzingen.

It is nearly round, and very compact.

Was it frozen ? This, then, is younger thanthe compact till. The latter was made during theadvance, and the former at the time of greatestextension of the glacier.]