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Ambient light underwater photograph exposure on a steep slope under the sea ice ceiling. The dark blotches on the sea ice ceiling are due to ice formation on the bottom further upslope, which then breaks loose & floats up to the ice ceiling, carrying rocks and such up with it. Cape Armitage, McMurdo Station, Antarctica. c1970

Ambient light underwater photograph exposure on a steep slope under the sea ice ceiling. The dark blotches on the sea ice ...