Sir,
The depression I have described is closed from all sides, as also are all the other ones mentioned in my previous letter, so their formation is not possible without an ice flow against the direction of the surface slope.
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Published online by Cambridge University Press: 30 January 2017
Sir,
The depression I have described is closed from all sides, as also are all the other ones mentioned in my previous letter, so their formation is not possible without an ice flow against the direction of the surface slope.