Crater-like Depressions in Glaciers
1892; Nature Portfolio; Volume: 46; Issue: 1194 Linguagem: Inglês
10.1038/046466c0
ISSN1476-4687
Autores Tópico(s)Landslides and related hazards
ResumoIN the note on the St. Gervais Catastrophe (NATURE of September 1) I read that a crater-like depression had been found in the Tête Rousse Glacier. As such depressions are quite exceptional occurrences in European glaciers, it may be of interest to note that I found several holes of a similar kind in the great Tasman Glacier in New Zealand. One of these reached—like the Tête Rousse one—apparently to the bottom, the others, which were from 150 feet to 300 feet deep, did not. The walls of these “craters” were not vertical but above only 45° the incline increasing below. Till now I have considered these funnel-shaped depressions as immensely widened “Glaciermills,” but after the observation on the Tête Rousse it seems to me not improbable that these holes on the Tasman were also originally caused by subglacial collapse.
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