Ablation Cones on Sidujökull, Iceland

Kozarski, Stefan; Szupryczyński, Jan

doi:10.1080/00291957108551916

Cited by 4 publications

(1 citation statement)

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“…A large literature discusses minor relief features on medial moraines without relating them to the type of origin of the moraine as a whole. Dirt-cones, rock tables and supraglacial melt-stream activity have been well researehed (Agassiz, 1840; Forbes, 1859; Ray, 1935; Lewis, 1940; Sharp, 1949; Swithinbank, 1950; Wilson, 1953; Streiff-Becker, 1954; Krenek, 1958; Lister, 1958; Kozarski and Szuprycznski, 1971; Drewry, 1972; Knighton, 1973): a literature on dirt cones has, for instance, existed since 1750 (Thorarinsson, 1960).…”

Section: Previous Workmentioning

confidence: 99%

A Framework for the Investigation of Medial Moraine Formation: Austerdalsbreen, Norway, and Berendon Glacier, British Columbia, Canada

Eyles

Rogerson

1978

J. Glaciol.

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ABSTRACT. M o rphology of media l m oraines on Austerda lsbreen, Norway, a nd Berendon Glacie r, British Columbia, dep e nds upon englacia l d e bris suppl y. M aj o r sub-types of this " ablation-dominant" m od el a re rela ted to the zo ne of debris entra inme nt rela tive to the firn lin e, a nd the m a nner of entrainment.On Auste rdalsbreen, debris d eri ved from extraglacia l bedrock slopes is e ntrained via crevasses at the confluence of two ice-cap outlet gl aciers below the firn line. R evela tion of c revasse-bound de bris ge nera tes a distinct ice-co red m orphology whi ch is destroyed as c r evasse bottoms are revealed down-glacie r.On Berend o n Gl acier ice stream s coalesce a bove and below the firn line. Above the firn line, d ebris from extraglacia l rock outcrops, subni val a nd subglacial zones, und ergoes seasonal sedime nta tion with snowfall , a nd exte nds throughout the ice depth. Distinc t m orain e morphology in the termin a l zone is rela ted to continuing debris supply. M ost debris is transported a t depth n ear the glacier base.An " ice-strea m interaction" mod el where media l mora ines formed below the firn line from the confluence of ice strea ms with large la teral m o ra ine load are morpho logi cally contro ll ed by flow, explains m o rphology on the Berend o n Glacier in the m a in confluence zone o nly. D own-glacier, this moraine beco m es "ablation d omina nt". A minor " a vala nch e-type" model is also r ecognized.R ESUME. Sur le Ber endon Glacier, les coura nts de glace se re unissent a u-dess us e t e n-d essous de la ligne d es neves. Au-dessus de cette ligne, les mate ria ux issus des rochers cxte rie urs a u glacier e t ceux des zones sous-gla ciales et sous-nivales se trou vent enfouis sous la sedimenta ti on saisonni ere due a ux c hu tes de neige e t se re pa rtissent da ns I'epaisseur d e la glace. On p eut m etlre en rela ti o n d a ns la zone termin a le un e morphologie distincte de la moraine selon le type d'appor t d e m a teriaux. L a plus gra nde pa rtie d es m a teria ux sont tra nsp o rtes pres du fond du glacie r.U n mod ele " d ' interaction des coura nts glaciaires" ou les moraines m edia nes formces sous la ligne des neves a pa rtir d e la confluence d es flux glaciaires avec un e fo rte charge m o ra iniq ue latcrale sont controlces morphologiq u em e n t pa r le cOUl'ant, explique la m o rpho logi c du Berend o n G lacier uniquem e nt d a ns la principa le zo ne d e confluence. Plus b as sur le gl acier ce tte m oraine dev ient du type "ablation d o min a nte".On a recon n u egaleme nt un " type a avala nches" de m oindre importa nce. VO Il MittelmoriilZell : AlIsterdalsbreelZ, NorwegCll , ulld B ereT/doll Glacier, British-Columbia, Kallada. Die M orphologic de r Mittelmora nen a m Austerdalsbre in Norwege n und a m Berendon G lacie r in British-Columbia, Ka nada, hangt vom Nachschub an Schutt aus dem Gl e tscher a b. Wi chtige U nter type n d ieses "ablationsbedingten" Modells stehen in Bezie hung zur Zone d e r Schutta ufnahme rela tiv zur Firn...

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Section: Previous Workmentioning

confidence: 99%

A Framework for the Investigation of Medial Moraine Formation: Austerdalsbreen, Norway, and Berendon Glacier, British Columbia, Canada

Eyles

Rogerson

1978

J. Glaciol.

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Glaciological Literature

1972

J. Glaciol.

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THIS is a selec ted li st of gla ciological litera ture on th e sc ientific study o f sn ow a nd ice and of their effec ts on the E a rth ; for th e litera ture on pola r expeditions, a nd also o n th e " a pplied " asp ec ts of glaciology, su ch as snow ploughs, readers should consult the hibliogra phies in ea c h issue of th e P olar R ecord. For Russia n m a teria l the system o f transliter a ti on used is tha t agreed by the U.S . Board on G eogra phic N a m es a nd the Perma nent Committee on G eographical N a mes for British Offic ia l U se in 194 7. R ead ers ca n grea tl y assist by sending reprints of their publications to the Soc iety, or b y informing Dr j . W . Gl en of publica ti ons of gl aciol ogi cal interest. It should be noted th at th e Society d oes not necessarily hold copi es of the item s in this list, a nd also that th e Society does no t possess fa c ilities fo r mi c rofilming or pho tocopying. GENERAL GLAGIOLOGYBJORNSS ON, H . Hugl eioing urn jokla ra nns6knir a i sla ndi. } okull, AI' 20, 1970, p . 15-26 . [Genera l acc ount of m od ern glaciologi cal th eories a nd techniques; measurem ents o f g lac ier va ri a tions a nd proposed researc h proj ec ts in I ce la nd . English summ a r y, p. Vo!. 56, No. 6, 1972, p. 2678 [Study ofme1tin g lin es a nd tr ipl e points in vo lving the me tas ta bl e phase ice I V produced b y using nucleators for both H 2 0 a nd 0 ,0 . I sotope effec t on transitions.] FLETCHER, )/. H. Structura l aspects of th e ice-water sys tem. Reports on Progress in Physics, Vo!. 34, No. 10, 197 [ [p ub. [972], p. I nternational, B, Vo!. 32, No. 2, 1971 , p. 979-B . [Observatio ns of processes occurring when ice cr ystallizes on a pell et im mersed in fl owing brine. Abstract of Ph .D . thes is, University of Illinois at U rba na-Champaign, 1970. University Mic rofilm s ord er no. 7 1-1 4806.] j ENEVEAU, A., and SIXOU, P . Dipolar rel axa ti on a t low tem pera ture of ice single c rystal. Solid S late Communications, Vo!. 10, No. 2, 1972, p. 191 -94. [Observation of depola ri zation thermocurrents of ice single crystals show two peaks attribu ted to Bj errum defec ts and ioni c sta tes.] J ONES, D . R . H ., and CHADWICK, G. A. Experimental measurement of solid-li q ui d interfac ia l energies : the icewater-sodium c hl oride system . J ournal of Crystal Growth, Vo!. 11 , No. 3, 197 ' , [Cha nge in interfacia l e nergy with NaCI concentra tio n.] KROH, j. , and STRADOWSKI, C. R adiol ysis of a lkalin e ice conta ining additives. R adiochemical and Radioanalytical L ellers, Vol. 9, No. 3, 1972, p. 169-77

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Ablation till and related indicatory form at the margins of Vestspitsbergen glaciers

Drozdowski

1977

Boreas

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The marginal zones of three Vestspitsbergen glaciers have been studied. Two main types of ablation till and related forms are distinguished: (1) ridges, cones, and troughs aligned parallel to the glacier margin (controlled or structural forms), formed of locally derived material and resulting from compression flow, and (2) an irregular debi‐is cover (non‐controlled or non‐structural), formed through extensive or balanced flow from material transported englacially over a longer distance.

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Ablation Cones on Sidujökull, Iceland

Cited by 4 publications

References 7 publications

A Framework for the Investigation of Medial Moraine Formation: Austerdalsbreen, Norway, and Berendon Glacier, British Columbia, Canada

A Framework for the Investigation of Medial Moraine Formation: Austerdalsbreen, Norway, and Berendon Glacier, British Columbia, Canada

Glaciological Literature

Ablation till and related indicatory form at the margins of Vestspitsbergen glaciers

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