Kent Frost stands at the drop-off of about 30 ft. in the side canyon that enters the Colorado River on the left bank in Cataract Canyon, Mile 213. Standing Rock country in the background which is the opposite side of the Colorado River

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  Kent Frost at the first drop into Red Lake Canyon or Butler Canyon. The Land of the Standing Rocks across the Colorado in background

  Manuscripts

  mssMarston papers V007/0116

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  Gypsum at the left of side canyon opening from the Colorado River at Mile 213. The background is the Standing Rock section back of Spanish Bottom

  Manuscripts

  mssMarston papers V007/0127

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  Kent Frost at the first drop in Red Lake Canyon, also known as Butler Canyon, which enters the Cataract Canyon at Mile 213 from the left opposite Spanish Bottom

  Manuscripts

  mssMarston papers V007/0119

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  Upriver view along the left bank of the Colorado River showing the gypsum at the mouth of the side canyon which enters at Mile 213

  Manuscripts

  mssMarston papers V007/0133

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  Upstream view of Colorado River in Cataract Canyon from approximately Mile 212.2. First rapid shows at left. Greenery in middle distance is at mouth of side canyon which enters river at Mile 213 opposite Spanish Bottom

  Manuscripts

  mssMarston papers V007/0186

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  The heavy drop in Red Lake Canyon, also known as Butler Canyon, which enters Cataract from the left at Mile 213

  Manuscripts

  mssMarston papers V007/0120