Periglacil environment and its lower border in sabalan mountain

Subject Areas : Geopolitic

عبدالحمید Rajaei ¹ , علی Dalal Oghli ²

1 - ندارد
2 - ندارد

Received: 2015-01-16 Accepted : 2015-01-16 Published : 2004-10-22

Keywords: Periglacier, Sabalan, Mountain climate, Patterned ground, Nivation, Rockglacier,

Abstract :

The sabalan periglacial environment is characterized by patterned ground and nivation,large phenomena obtained from mass movement such as rockylacier and solifluction,production of talus and breaking rock scarp. This zone extends into the glacier zone,too. Above the lower periglacial border the basic aspect of the vegetation cover is ofuro – siberian type. There are various methods to determine the periglacal lowerborder, and comparison of the results obtained by various methodes show that differenttechniques can give different results. The height of periglacial lower border obtainedby various methodes ranges from 2800 to 3655 m, but the lower limit of periglacialactivity with regard to MAAT of about 3000 m.