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| The landscape of confluence of the Rio Conchos and Rio Grande has abundant unmistakable evidence of flood deposits and erosion. In this scene the lower Conchos snakes its way to the confluence area, which is marked by the stand of cottonwood trees in the near background. To the left, the flat modern floodplain on the north side of the Conchos conceals numerous abandoned meander scars of the river. The dirt road in the foreground on the other side of the river cuts through fine silty alluvium deposits that flanks the high gravel terrace upon which Ojinaga sits. Deep excavations across this scene would undoubtedly encounter archeological deposits from many different periods, probably stretching back thousands of years. Photo by Steve Black. |