. Geology of the Narragansett basin. Geology. THE CAEBONIFEBOUS BASIN. 121 GENERAL STRUCTURE OP THE BASIN. The broader secondary features of the basin—the system of folds with their axes and the parallel direction of the borders—are relatively simple. The structural outline of the basin is that of a ship's knee, with the angle on the northwest, one arm extending southward to the mouth of Nari^agansett Bay, the other eastward toward Cape Cod Bay, and the inner curve forming the border from Tiverton northeastward to Lake- ville. If a line be drawn from the northwestern corner near Diamond Hill (
. Geology of the Narragansett basin. Geology. THE CAEBONIFEBOUS BASIN. 121 GENERAL STRUCTURE OP THE BASIN. The broader secondary features of the basin—the system of folds with their axes and the parallel direction of the borders—are relatively simple. The structural outline of the basin is that of a ship's knee, with the angle on the northwest, one arm extending southward to the mouth of Nari^agansett Bay, the other eastward toward Cape Cod Bay, and the inner curve forming the border from Tiverton northeastward to Lake- ville. If a line be drawn from the northwestern corner near Diamond Hill (see fig. 7) south- eastward to a bisection of the curvilinear border near Fall River, it will pass through the three deep synclinal depres- sions in which the upper- most conglomerates of the Carboniferous have been infolded and pre- served from denudation. On the noi'thwest this line also passes through the small area of pro- found dislocation and uplift which brings the granitite of Hoppin Hill, the Cambrian, and the lower Carboniferous trend nearly north and west This axis of pr ^%s- -c2/»3£ 7/'*IS' 7/og'd?. 7^30' 70''-4S' FiQ 7 —Map showing general outline of the Narragansett Basm, A-B, Im© pass- ing tkroQgh, deeper synclmesof middle of the area, aa, inher of gmnitite and Cambiian at Hoppm Hill and the Diamond Hill qnartz mass on western border, bb, granitic and gneissio mliers near Bnstol Ebode Island, cc, synchnes with coarse conglomerates, oo, synolines along northern border of the basm, dd, gneiss structnre in Kew Bedford area strata to the surface. West of this line the strikes south; east of the line they trend about east and essure, moreover, appears to have been that in. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Shaler, Nathaniel Southgate, 1841-1906; Woodworth, Jay Backus, 1865-19
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