Transcript GEOMORFOLOGIA

The glacier Basei viewed from the north, almost completely devoid of
snow
We live in a hot natural phase, but in particular
the human activities have helped to increase
this phenomenon.
The rate of melting of glaciers has tripled since
1970.
In 2030, the glaciers could be just a
memory
THE LAKE BORN BETWEEN THE
CLOUDS
Ghiaccio del
Rocciamelone
First phase of development in the 1980
The situation in September 2000
Measurement of the depth of the lake using a sonar
The glacial erosion
Strong pressure exercised by the
glacier moving and by the friction
enhanced by the presence of debris.
U valleys
Ample funds and often stepped,
flanked by steep scarps
The lower Susa’s valley
Moraine accumulation
Jumble of boulder scattered in a matrix of sand and silt
Lateral moraine
The lateral moraine that blocks the pond indicates the greater level
reached by the glacier
Glacier of the Mare (Ortles-Cevedale)
The amphitheatre of the Lake of Miage (Monte Bianco) is
composed of twenty concentric moraines (pile of rock debris)
Glacial strip
(Valley of Funes – Alto Adige)
Sheepbacks (or back of whale)
Striped rocks
The sheepbacks are generally rounded on the
top and in the side, oriented according to the
direction of glacier
The big rocks
Erratic rocks
The erratic rocks can be transported over long distances
by glaciers
Caselette
The big rock in the entrance of the
village
Pianezza
Il “Roc”
Villarbasse
Condove
The rock of Castellazzo
The block rocky region Castellazzo is a typical
example of a boulder, fell for landslide on the
surface of a glacier and transported in the valley
THE VALLEYS SUSPENDED
The longitudinal profile of a glacial
valley
threshold
navel
Germanasca’s Valley – Torino – I tredici laghi
Rock glaciers
characteristic
accumulations of large
blocks with their lobed
shape