. 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. Fig. 12.—D. M. Mitchell Brook section, c, bakedarkose conglomerate; h, anterior basalt; s, redanterior shale; t, talus of basalt. The parallel -lines in the sediments indicate the dip of thebedding plane. 52 NEWARK SYSTEM OF POMPERAUG VALLEY, CONN. after the manner of shingles on a roof, are the layers of a gray shalylimestone, which, like the red shale Wers at the contact just described,appear not to have been sensibly disturbed by any
. 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. Fig. 12.—D. M. Mitchell Brook section, c, bakedarkose conglomerate; h, anterior basalt; s, redanterior shale; t, talus of basalt. The parallel -lines in the sediments indicate the dip of thebedding plane. 52 NEWARK SYSTEM OF POMPERAUG VALLEY, CONN. after the manner of shingles on a roof, are the layers of a gray shalylimestone, which, like the red shale Wers at the contact just described,appear not to have been sensibly disturbed by any local movementalong the contact (see fig. 14). The observations at the two localities agree, therefore, in indicatingthat the floor on which the shale and limestone were deposited was a. Fig. 13.—Sketch map of nn area near Red Spring, a, Contact of anterior shale on anterior basalt,exposed by digging. The anterior basalt is indicated by small circles, the anterior .«hale by parallelrulings, Hn<l the main basalt by cross hachures. An outcrop of spheroidal basalt is indicated by thesame design uiM)n which is superimposed a set of circles. slightly inclined one and, moreover, was possessed of notable irregu-larities of surface. The other exposed contacts of the amygdaloid and shale, which arelocated in the spring section, near South Britain, are clearly fault contacts, and their consider-ation will be deferred until thedeformation of the area is treated(see Chapter IV). One character-istic of the amygdaloid at thislocality should, however, be men-tioned here. By reference to thesketch map of the area (fig. 27, ), it will be seen that the red shalehere has outcrops in the shape ofan acute triangle or wedge, theapex of which is exposed in the stream bed. T
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