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Record #199361:

The Tré-la-Tẽhe rockfall onto the Glacier de la Lex Blanche, Mont Blanc Massif, Italy, in September 2008 / Philip Deline.

Title: The Tré-la-Tẽhe rockfall onto the Glacier de la Lex Blanche, Mont Blanc Massif, Italy, in September 2008 / Philip Deline.
Author(s): Deline, Philip.
Date: 2007.
In: Geografia Fisica e Dinamica Quaternaria. (2007.), Vol. 31(2) (2007)
Abstract: Examines possible causes for rockfall from east-facing spur of Aiguille de Tré-la-Tẽhe in upper Val Veny. In probably largest such fall in Mont Blanc Massif since 2005, around 50,000 m³ of rock fell from 3,470 m onto Petit Mont Blanc glacier (main tributary of Lex Blanche) before travelling more than 1 km. Discusses evidence from direct observation and lateral/medial moraines for earlier slope instability. Observes that debuttressing of rock wall by glacier downwasting over two decades may have reduced rock wall stability, but permafrost degradation is probably main trigger, as for an estimated 55% of 62 other rockfalls observed in massif in 2007 and 2008 (by network of alpine guides and hut keepers established in framework of project PERMAdataROC)
Notes:

Geografia Fisica e Dinamica Quaternaria. Vol. 31(2) :251-254 (2007).

Keywords: 551.34 -- Geocryology. Frozen ground.
551.345.2 -- Permafrost, formation and decay.
551.342 -- Frost shattering.
551.435.627 -- Landslides.
551.324.22 -- Glaciers: Petit Mont Blanc.
551.324.22 -- Glaciers: Lex Blanche.
551.324.8 -- Land ice, structure and surface features.
551.324.83 -- Land ice, load.
551.324.63 -- Land ice, advance and retreat.
551.3.053 -- Geological erosion, corrosion and disintegration.
551.332.51 -- Ice-marginal landforms.
001.89(100) -- Research programmes, international: PERMAdataROC.
E8 -- Glaciology: frost action and permafrost.
(234.3) -- Alps.
SPRI record no.: 199361

MARCXML

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100 1# ‡aDeline, Philip.
245 14 ‡aThe Tré-la-Tẽhe rockfall onto the Glacier de la Lex Blanche, Mont Blanc Massif, Italy, in September 2008 /‡cPhilip Deline.
260 ## ‡a[S.l.] :‡b[s.n.],‡c2007.
300 ## ‡ap. 251-254 :‡bill., map.
500 ## ‡aGeografia Fisica e Dinamica Quaternaria. Vol. 31(2) :251-254 (2007).
520 3# ‡aExamines possible causes for rockfall from east-facing spur of Aiguille de Tré-la-Tẽhe in upper Val Veny. In probably largest such fall in Mont Blanc Massif since 2005, around 50,000 m³ of rock fell from 3,470 m onto Petit Mont Blanc glacier (main tributary of Lex Blanche) before travelling more than 1 km. Discusses evidence from direct observation and lateral/medial moraines for earlier slope instability. Observes that debuttressing of rock wall by glacier downwasting over two decades may have reduced rock wall stability, but permafrost degradation is probably main trigger, as for an estimated 55% of 62 other rockfalls observed in massif in 2007 and 2008 (by network of alpine guides and hut keepers established in framework of project PERMAdataROC)
650 07 ‡a551.34 -- Geocryology. Frozen ground.‡2udc
650 07 ‡a551.345.2 -- Permafrost, formation and decay.‡2udc
650 07 ‡a551.342 -- Frost shattering.‡2udc
650 07 ‡a551.435.627 -- Landslides.‡2udc
650 07 ‡a551.324.22 -- Glaciers: Petit Mont Blanc.‡2udc
650 07 ‡a551.324.22 -- Glaciers: Lex Blanche.‡2udc
650 07 ‡a551.324.8 -- Land ice, structure and surface features.‡2udc
650 07 ‡a551.324.83 -- Land ice, load.‡2udc
650 07 ‡a551.324.63 -- Land ice, advance and retreat.‡2udc
650 07 ‡a551.3.053 -- Geological erosion, corrosion and disintegration.‡2udc
650 07 ‡a551.332.51 -- Ice-marginal landforms.‡2udc
650 07 ‡a001.89(100) -- Research programmes, international: PERMAdataROC.‡2udc
650 07 ‡aE8 -- Glaciology: frost action and permafrost.‡2local
651 #7 ‡a(234.3) -- Alps.‡2udc
773 0# ‡7nnas ‡tGeografia Fisica e Dinamica Quaternaria. ‡gVol. 31(2) (2007) ‡wSPRI-57546
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