Terpano
Original illustration

Sastrugi Snow Plain

Icelandic Interior Plateau

Sastrugi Snow Plain — original illustration of Icelandic Interior Plateau

Sastrugi Snow Plain is an original illustration set in Icelandic Interior Plateau. It lies in high latitudes, where the climate is tundra — too cold for trees.

Hundreds of sharp parallel snow ridges run across a treeless plateau, all aligned the same way, each with a steep chipped face on one side and a shallow ramp on the other. Blue-grey ice shows between some of them. Thin snow streamers skim the surface under solid overcast.

Why are these snow ridges chipped and irregular?

Sastrugi are erosional, not depositional — wind carves them out of packed snow rather than piling them up, which is why the faces are chipped and irregular rather than smooth. They only survive where it is cold enough that the snow never melts and windy enough that it never softens. Exposed ice between ridges shows the wind has scoured right through the loose layer.

Terpano is a free daily geography puzzle. You study one original illustration, place a pin on a borderless terrain map, and see how close you were. There is no account and no sign-up; progress stays in your own browser. It plays in 11 languages.

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