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Stanton Repeat Photography

Mile 127.9, Colorado River, Upstream View from River Left (Stake 1582b)

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Stake 1582b, 22 February 1890 View Larger Image
22 February 1890
This upstream view shows a rough surface on the top of the black amphibolite of Middle Granite Gorge with Tapeats Sandstone in the right midground. Barrel cacti are the most readily identifiable plants in this view, although perennial grasses appear to be present on the colluvial slopes under the Tapeats Sandstone. While Mormon tea is also present, the image is too blurry to permit identification of the other plants. Fluffgrass, surprisingly enough, is readily identifiable in the immediate foreground.
Photo credit: Robert B. Stanton, 57-RS-567, courtesy of The National Archives

Stake 1582b, 16 February 1991 View Larger Image
16 February 1991
Barrel cacti grow in abundance on this surface, and Mormon tea individuals, subdued in the 1890 view, can be seen to persist. Fluffgrass continues to grow in the foreground and throughout the view, but this biennial species is unlikely to have persisted for 101 years. Other plants growing here now include brittlebush, three-awn grass, and spiny brickellbush.
Photo credit: Robert H. Webb

Stake 1582b, 24 September 2010 View Larger Image
24 September 2010
In the ensuing two decades, there has been some mortality and recruitment of the barrel cacti, with many individuals persisting the intervening 19 years. Spiny brickellbush, three-awn, and brittlebush also persist. Fluffgrass continues to grow in the foreground, although in slightly different positions; this seems to suggest that this short-lived species prefers certain sites in the amphibolites. 
Photo credit: John Mortimer

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