Glacial erosion
79
Figure 3.14. Aerial view of horns, cirques, ar~tes and glacial valleys. Eastern Pyrenees.
out in mountain areas located to windward, that receive great nival precipitation and also
feed thick glaciers running through preglacial valleys producing a considerable,
sometimes spectacular, modification of the relief.
According to Linton (1963) four types of glacial valleys are distinguished. The alpine
type has feeding that takes place from a cirque or set of cirques in high zones. The iceland
type has an ice cap escaping preglacial valleys that forms the glacier. The composed type
occurs where ice does not find sufficient previous valleys to unload all the ice, or similarly,
Figure 3.15. Coalescent cirques, ar~tes and a glacial valley (in Holmes (1965), Fig. 4.81 modified by Davis
(1906)).
79
Figure 3.14. Aerial view of horns, cirques, ar~tes and glacial valleys. Eastern Pyrenees.
out in mountain areas located to windward, that receive great nival precipitation and also
feed thick glaciers running through preglacial valleys producing a considerable,
sometimes spectacular, modification of the relief.
According to Linton (1963) four types of glacial valleys are distinguished. The alpine
type has feeding that takes place from a cirque or set of cirques in high zones. The iceland
type has an ice cap escaping preglacial valleys that forms the glacier. The composed type
occurs where ice does not find sufficient previous valleys to unload all the ice, or similarly,
Figure 3.15. Coalescent cirques, ar~tes and a glacial valley (in Holmes (1965), Fig. 4.81 modified by Davis
(1906)).