In the Pleistocene period many large lakes were formed within the Great Basin; especially, by the fusion of small catchment basins, two great confluent bodies of water - Lake Lahontan (in the Nevada basin) and Lake Bonneville (in the Utah basin).
C. Russell's Lake Lahontan (Same, No.
During the glacial period many of the Nevada lakes attained a great size, several of them uniting to form the ancient " Lake Lahontan," in northwestern Nevada.
4 (June 1895); idem., The Geological History of Lake Lahontan, a Quaternary Lake of North-western Nevada (Washington, 1885), U.S. Geological Survey Monograph, No.
During Pleistocene times all these lacustrine basins were occupied by lakes of much greater depthand la~ger size; the outlines of the eastern (Lake Bonneville) and the western (Lake Lahontan) water bodies are well recorded by shore lines and deltas on the enclosing slopes, hundreds of feet above the present lake surfaces; the abandoned shore lines, as studied by G.
The Quaternary beds of lakes Bonneville and Lahontan have been faulted in a small way since they were deposited, and the old shore lines of these lakes have been deformed to the extent of hundreds of feet.