cryoconite hole

cryoconite hole

[krī′äk·ə‚nīt ‚hōl]
(geology)
A cylindrical dust well filled with cryoconite; absorbs solar radiation, causing melting of glacier ice around and below it.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Director Orlowski adds other practical and understated material, probing the cryoconite holes that melt giant ice sheets, rappelling into spectacular moulins and panning vast landscapes with Balog's crew in view to convey the daunting scale.