In the glaciated districts of France similar phenomena are met with.
Thus in Cantal, according to M. Rames,[BL] the glacial deposits belong
to two separate epochs. The older morainic accumulations are scattered
over the surface of the plateau of Archæan schistose rocks, and extend
up the slopes of the great volcanic cone of that region to heights
of 2300 to 3300 feet. One of the features of these accumulations
are the innumerable gigantic erratics, known to the country folk as
_cimetière des enragés_. Sheets of fluvio-glacial gravel are also
associated with the moraines, and it is worthy of note that both have
the aspect of considerable age--they have evidently been subjected to
much denudation. In the valleys of the same region occurs a younger
series of glacial deposits, consisting of conspicuous lateral and
terminal moraines, which, unlike the older accumulations, have a very
fresh and well-preserved appearance. With them, as with the older
moraines, fluvio-glacial gravels are associated. M. Rames shows that
the interval that supervened between the formation of the two series of
glacial deposits must have been prolonged, for the valleys during that
interval were in some places eroded to a depth of 900 feet. Not only
was the volcanic _massif_ deeply incised, but even the old plateau of
crystalline rocks on which the volcanic cone reposes suffered extensive
denudation in interglacial times. M. Rames further recognises that the
second glacial epoch was marked by two advances of the valley-glaciers,
separated by a marked episode of fusion, the evidence for which is
conspicuous in the valley of the Cère.
[BL] _Bull. Soc. Géol. de France_, 1884.
The glacial and interglacial phenomena of Auvergne are quite analogous
to those of Cantal. Dr. Julien has described the morainic accumulations
of a large glacier that flowed from Mont Dore. After that glacier had
retreated a prolonged period of erosion followed, when the morainic
deposits were deeply trenched, and the underlying rocks cut into.
In the valleys and hollows thus excavated freshwater beds occur,
containing the relics of an abundant flora, together with the remains
of elephant (_E. meridionalis_), rhinoceros (_R. leptorhinus_),
hippopotamus, horse, cave-bear, hyæna, etc.--a fauna comparable to
that of the Italian interglacial deposits. After the deposition of the
freshwater beds, glaciers again descended the Auvergne valleys and
covered the beds in question with their moraines.[BM]
[BM] _Des Phénomènes glaciaires dans le Plateau central de France, etc._
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