suncups
Bowl-shaped depressions that form on a snow surface through uneven melting caused by solar radiation. The cups deepen as dirty or darker patches absorb more heat. A late-season snowfield covered in suncups looks like the surface of a golf ball.
Etymology
Descriptive English compound. The cups face the sun.
Notes
An early stage of the same process that produces penitentes at higher altitudes and lower latitudes.
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