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Show 3286 Dobbin- D 1311 the topography is rolling formation, continuous rainfall; but the cutting in this country is straight down. Where you have those all native heavy sandstones and shale you have got the sandstone standing out on the Colorado and on the Green river side as pronounced escarp-ments, and with the exception of two or three places are inaccessible; there is one of those above the other, a serious of them separated by shale slopes. Q Are the geological formations such that they contribute in a substantial way to the silt in the Colorado and the Green river? A To a certain extent, yes. The heavy sandstones are not eroded, but between the sandstones are thick strata of red shale, which will erode very easily, and can be carried in the streams down the steep descent by torrential rains. Q What is the character of the surface, and of the vegetation on it? A If you remember, as you come southwest from Thompson the road forks, one road going west to Greenriver and one south to Moab. At the forks of the road is the post office or ranch and reservoir known as Valley City. In there there is marine shale at the surface, which is all covered with a slight deposit of silt -- not silt, but win- blown material; that is flat, nearly flat, and very rolling; but as you |