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Requirements:
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- good sediment sink (fjords with sills that define deep basins,
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and proglacial
lakes are ideal)
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glacier
must be in retreat otherwise they would be over-riding
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and
entraining their own sediments; sediment yields would not
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reflect
bedrock erosion (this is easy
because, with few notable
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exceptions, all
glaciers have been in retreat since the early
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1900s, the end of
the Little Ice Age)
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Glacier
must be fast moving and highly erosive to produce
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easily
measured sediment volumes
(seeking large signal-to-
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noise ratio)
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