. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 12' Brown residual gravel 51 Red clays Grey conglomerate and cross- bedded sands. Fig. 5. depression. Section of the Tung Gur formation on the north side of the Tairum Nor durable accumulations of residuary gravels which are the rule in the central and western portions of the Iren Gobi. To t
. Central Asiatic Expeditions of the American Museum of Natural History, under the leadership of Roy Chapman Andrews : preliminary contributions in geology, palaeontology, and zoology. Central Asiatic Expeditions (1921-1930); Scientific expeditions; Natural history; Scientific expeditions; Natural history. 12' Brown residual gravel 51 Red clays Grey conglomerate and cross- bedded sands. Fig. 5. depression. Section of the Tung Gur formation on the north side of the Tairum Nor durable accumulations of residuary gravels which are the rule in the central and western portions of the Iren Gobi. To the west and north the beds are undergoing destruction; they are encroached upon by the con- stant enlargement of the inner lowland which separates them from the oldrock basin rim of the Iren Gobi, and by the equally rapid expansion of the lowland hollows of Tairum Nor and P'ang Kiang. In the eastern- most part of the region seen by the expedition, the surface is pitted by a great group of depressions forming the lake district of Ungur Tsagan Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Central Asiatic Expeditions (1921-1930); Andrews, Roy Chapman, 1884-1960; Matthew, William Diller, 1871-1930. [New York : American Museum of Natural History
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