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Why does a mountain’s shadow appear triangular?

MOUNTAINEERING -- Even experienced mountaineers have been stopped in their tracks occasionally by the rare sight of a triangular shadow darkening the landscape in the distance away from a major peak.

The triangle shadow phenomena is fairly commonly seen from the tops of large mountains and volcanoes, but not well understood.

Check out this astronomy website for a good explaination.  Navigate to the Astronomy picture of the day for July 5, 2011.




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Rich Landers
Rich Landers joined The Spokesman-Review in 1977. He is the Outdoors editor for the Sports Department writing and photographing stories about hiking, hunting, fishing, boating, conservation, nature and wildlife and related topics.

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