. Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900--Twenty-First Annual Report of the United States Geological Society. thecourse of th(> river has here been directed by the same structuralconditions. The general harmony of the stream courses with the series of dislo-cations ali-eady mapped having been determined, the question maywell be asked whether such an adjustment of the drainage system tothe fault system can be accidental—whether the parallelism observedis a mere coincidence. With a suflicient number of fault directionsand the assumption of suf
. Annual Reports of the Department of the Interior for the Fiscal Year Ended June 30, 1900--Twenty-First Annual Report of the United States Geological Society. thecourse of th(> river has here been directed by the same structuralconditions. The general harmony of the stream courses with the series of dislo-cations ali-eady mapped having been determined, the question maywell be asked whether such an adjustment of the drainage system tothe fault system can be accidental—whether the parallelism observedis a mere coincidence. With a suflicient number of fault directionsand the assumption of sufficiently short elements of the stream courses,it would, of course, be possible to find at least a partial parallelism ofany two systems whatsoever. The establishment of a causal relation-ship of the one system to the other will be the more certain the smallerthe number of fault directions employed and the longer the stretchesof stream course within which essential parallelism to any of the faultdirections obtains. ^Yithin the Pomperaug Basin, and except in its southern zone, whereother and special directions of faulting are discovered, we find prac-.
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