. Bulletin of the Geological Society of America. Geology. 174 W. H. HOBBS REPEATING PATTERNS IN STRUCTURE OF LAND. MILES Figure 44.—Changes of Throw measured on the Course of a Fault near the Shore of Bus- sell Fjord, Alaska This fault opened in September, 1899, (After Tarr and Martin) Kaigenko, it was the south limb which was downthrown and by approximately the same amount.^® The same holds true of the faults of the Owens Valley, California, either opened or increased, during the great earthquake of 1872. At a point a mile south and a little east from Diaz Lake, as is shown by the beautiful m
. Bulletin of the Geological Society of America. Geology. 174 W. H. HOBBS REPEATING PATTERNS IN STRUCTURE OF LAND. MILES Figure 44.—Changes of Throw measured on the Course of a Fault near the Shore of Bus- sell Fjord, Alaska This fault opened in September, 1899, (After Tarr and Martin) Kaigenko, it was the south limb which was downthrown and by approximately the same amount.^® The same holds true of the faults of the Owens Valley, California, either opened or increased, during the great earthquake of 1872. At a point a mile south and a little east from Diaz Lake, as is shown by the beautiful maps and views prepared by Johnson,*^ the vertical downthrow here changes most abruptly from the eastern to the western limb of the fault. Two additional instances may be cited which especially well illustrate the abrupt changes in vertical throw on earthquake faults. The Chedrang fault, opened in Assam during the great earthquake of 1897, offers one of the grandest examples of an earthquake fault that has thus far been studied. The throws, measured in feet, here uniformly applying to the upthrown limb, are given after Oldham^^ on the map reproduced in figure 43. As one goes from north to south along the course of the fault the displacements, measured in feet, read in order: 32, 0, 18, 35, 0, 8, 25, 12, 8, 2, 0. Perhaps even more interesting and sig- nificant are the throws on the fault which was opened near the shoreline of Eussell Fjord, Alaska, in September, 1899; since here the cross-valleys seem to represent roughly the dividing lines between consecu- tive fault blocks (see figure 44).^® ^ Omdri: Preliminary note on the Formosa earthquake of March 17, 1906. Bulletin E. I. C, vol. 1, No. 2, pi. 17. ^ The earthquake or 1872 in the Owens Valley, California. Beitrage zur Geophyslk, vol. 10, 1910, pp. 378-379, pi. 17b. 88 R. D. Oldham : Report on the great earthquake of June 12, 1897. Memoirs of the Geological Survey of India, vol. 30, pi. 42. 89 Tarr and Martin: Recent chan
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