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Muchii periglaciareArcada

Ace, piramideMarele Grohoti

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Defnitie: regiune de la periferia ghearilor pleistoceni i actuali, cuclim, procese i forme de relief caracteristice, determinate de condiiizico-geograce specice (alternana nghe-dezghe, soluri afectate de

nghe peren, !"nturi cu intensiti mari etc#$# %ipurile deforme determinate de clima rece, de roc i de panta topograc, sunt

reprezentate prin grohotiuri, r"uri de pietre, alunecri, a!alane, nieni!ale, &locuri glisante #a#

'olti 'onde grohotis

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Ansam&lul de forme si structuri dez!oltate in regiunileperiglaciare sunt rezultatul im&inarii mai multor agenti speciciacestei zone (inghet-dezghet, zapada, !ant si inghet in sol$# Acestiapro!oaca o serie de procese ca soli)u*iunea , dezagregarea,

procesele ni!ale si transportul eolian#

Muchii periglaciare +elief rezidual

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ormele de relief rezultate sunt

Grohotisurile (campuri de pietre$

+elieful rezidual

+elief rezidual

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olul de la suprafata poate sa inghete si sa se dezghete dela noapte la zi (ciclul diurn$ sau sa se dezghete numai !ara(ciclul sezonier$# .*ista si regiuni unde solul ramanepermanent inghetat, acest strat depasind /01 m grosime

(pergelisol$#

+auri de pietre

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+elieful periglaciar este gasit la contactul dintre regiunilepolare si cele temperate (in tundra$ si in muntii inalti dineta2ul alpin# e a)a dincolo de limita padurii, ind o zona detranzitie intre climatul polar si cel temperat#

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3ergelisolul se e*tinde in 4 'anadei, Alas5a, Groenlanda,6aponia, pits&ergen, Asia 'entrala si de 4ord-.st si ini&eria# e dez!olta si in regiunile temperate siintertropicale, insa numai la mari inaltimi, in depresiuni

inchise si fara !egetatie#

trunga

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http77888#8ile9#com7college7strahler71:;/:animations7animation?#html

@i&liograe

http77de*online#ro7denitie7?1periglaciar

http77ro#8i5ipedia#org78i5i7+elief>periglaciar

http77masi!ulpiatracraiului#&logspot#ro7?1//71=7reli

eful-periglaciar#html http77en!ironment#nationalgeographic#com7en!ironment7ha&

tats7tundra-prole7

http77

http://www.wiley.com/college/strahler/0471480533/animations/ch15_animations/animation2.htmlhttp://www.wiley.com/college/strahler/0471480533/animations/ch15_animations/animation2.htmlhttp://dexonline.ro/definitie/%20periglaciarhttp://ro.wikipedia.org/wiki/Relief_periglaciarhttp://masivulpiatracraiului.blogspot.ro/2011/03/relieful-periglaciar.htmlhttp://masivulpiatracraiului.blogspot.ro/2011/03/relieful-periglaciar.htmlhttp://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://www.nationsonline.org/oneworld/map/world_map2.htmhttp://www.nationsonline.org/oneworld/map/world_map2.htmhttp://www.nationsonline.org/oneworld/map/world_map2.htmhttp://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://environment.nationalgeographic.com/environment/habitats/tundra-profile/http://masivulpiatracraiului.blogspot.ro/2011/03/relieful-periglaciar.htmlhttp://masivulpiatracraiului.blogspot.ro/2011/03/relieful-periglaciar.htmlhttp://masivulpiatracraiului.blogspot.ro/2011/03/relieful-periglaciar.htmlhttp://ro.wikipedia.org/wiki/Relief_periglaciarhttp://dexonline.ro/definitie/%20periglaciarhttp://www.wiley.com/college/strahler/0471480533/animations/ch15_animations/animation2.htmlhttp://www.wiley.com/college/strahler/0471480533/animations/ch15_animations/animation2.html