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STS066-152-121 Arkansas River and Keystone Lake, Oklahoma, U.S.A. November 1994 The Arkansas River and much of north-central Oklahoma appear in this northwest-looking, low-oblique photograph. Dark blue Skiatook Lake lies north of silty Keystone Lake, which receives the southeast-flowing Arkansas River (upper center) and the east-flowing Cimarron River. Stillwater, just north of the Cimarron River, is a market and processing center for the surrounding farm and livestock area. Bartlesville, 41 miles (66 kilometers) north of Tulsa, is a distribution center for a ranching and rich oil producing area. West of Bartlesville and north of the Arkansas River appears the grass-covered, low, rolling terrain of the southern Flint Hills. | |