Traditional Opinion

Geology holds firmly to a number of notions basal in their nature and hoary with age, which receive from geologists that veneration which is thought to be appropriate from youth to age. One of these notions is that normal or “gravity” faults involve of necessity a tensional stress condition, just as a thrust displacement being directly a result of folding is a consequence of compression. Van Hise wrote in 1898, “The normal faults involve an elongation of the crust of the earth as certainly as the reverse faults involve a shortening of the crust of the earth.”2 The first part of the statement which is here in point may be correct enough if restricted to the area within the space of the faulted district. The view that the earth broadly considered is under compression has received strong support from the generally accepted view of a secular refrigeration of . . .

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