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Clues for June 2009:
1. These “potholes” formed from whirlpools created as one river fell into another, eroding out the surrounding bedrock with suspended sediment.
2. The feature is named after a local gold explorer. Although his quest was unsuccessful, gold was found nearby and the country went on to become the world’s leading gold producer for more than a century.
3. The feature sits in the largest “green,” or forested, canyon on Earth.
Name this feature and its location.
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Answer: Formed from whirlpools that churned as one river fell into another, Bourke’s Luck Potholes in South Africa sit in the largest forested canyon on Earth. Although the local gold explorer who the potholes are named after was unsuccessful in his search there, South Africa went on to become the world’s leading gold producer for more than a century. Photo by Ané Wessels.
June winners
Bryant Bigelow (Johnstown, N.Y.)
Cisco Borden (San Clemente, Calif.)
Katie DeBell (Kremmling, Colo.)
Mary Dowse (Silver City, N.M.)
Simon Kattenhorn (Moscow, Idaho)
Dale Kunitomi (Camarillo, Calif.)
Joe Rasche (Homewood, Ill.)
Robin Smith (Fairbanks, Alaska)
Glenn Stracher (Swainsboro, Ga.)
Anthony Tankard (Calgary, Alberta)
To submit your photographs to our Where on Earth? contest, send them via e-mail to
earth@earthmagazine.org.
