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Show Record direct examination as follows: 1308 I am a geologist and since 1917 have been continuously 1309 employed in geological work for oil companies and the Government. I made a trip by automobile from Denver to Greenriver, thence South on the West side of Greenriver to Elaterite basin, and thence to a point within two miles of the junction of the Green and Colorado rivers. My second trip was from Moab in a boat to the mouth of Green River in 1926. In the same year but later I went by automobile from Moab to Bluff by car and in 1927 I went from Moab to Monticello and turned Northwest and went down Indian Creek by automobile almost to the junction of the rivers. 1310 During the summer of 1926, pursuing my government work, I was over, either by boat or by horseback, a greater part of that pie- shaped area South of the railroad and between the Green and Colorado rivers. That area is occupied mostly by a horizontal strata consisting of solid sandstones, some of which are four or five hundred feet thick. In an arid region like that, erosion is quick and rapid, and when water flows it flows torrentially, and the cutting 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 escarpments, and with an exception of two or three places are inaccessible. There is one of those above the other, a series of them separated by shale slopes. These geological formations are such that they contribute to a certain extent to the silt in the Colorado and Green Rivers. The heavy sandstones are not eroded, but the thick strata of red shale between the sandstones erode very easily and can be carried in the streams down the steep descent by torrential rains. Southwest from Thompson the country is flat and very rolling, 1312 but as you proceed Southwest from there you get into very rugged country, over which is deposited loose and very thin deposits |