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calvingsastruginieve penitenteglacier flowsubpolar glaciersun cuptemperate glacierablation zoneequilibrium lineglacier floodmountainglacial landformpermafrostvalleyice in lakes and riverscoastal landformsdesertgrasslandsea iceplateau
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Louis Agassiz
Swiss-American scientist and educator

James David Forbes
Scottish physicist
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