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Home / Focus / Environment April 2008 / Trail mappers use a variety of terms to describe their work (access required)

Trail mappers use a variety of terms to describe their work (access required)

Trail Terminology:Trace: general term for any original trail remnant.Depression: shallow dip in the surface, often very faint and difficult to use.Swale: a depression of deeper dimension and with sloping sides.Rut: a deep depression, without a center mound and having steep sides.Erosion feature: a trace of any sort that has been deepened and altered by subsequent ...

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Research Station on the Colorado (access required)

This busy scene is a research camp at Pierce’s Ferry on the Colorado River in 1935. The barge, which looks as though it might once ...