red snow

noun

snow that has acquired a red color either from airborne particles of red dust or from a type of alga that contains a red pigment.

First recorded in 1670–80

Probably the Noctiluca is not rivalled in this respect even by miscroscopic unicellular alg which compose the "red snow."

In those high latitudes they met with a phenomenon, common in alpine regions, as well as at the Pole, red snow.

To this category belongs the phenomenon known under the name of "red snow."

The snow flea favors the south and east sides of the mountains, and it is there you will find the red snow.

They drew a sledge after them towards the Red-snow Valley, which was not more than two miles distant from the ship.

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