. Geology of the Narragansett basin. Geology. 108 GEOLOGY OF THE KARRAGAl^rSETT BASIK. disjoined parts ol a small dike of amphibolite,^ probably altered diabase, had, ill 1887, the appearance shown in the accompanying diagram (fig. 4). The contact relations of the limestones with the schists which inclose them have not been satisfactorily determined, by reason of the lack of good exposures. So far as the evidence yet obtained goes, the limestones appear to be of sedimentary origin, though no trace of fossils has been found in them. The lack of continuity in tlie exposures is probably due to co
. Geology of the Narragansett basin. Geology. 108 GEOLOGY OF THE KARRAGAl^rSETT BASIK. disjoined parts ol a small dike of amphibolite,^ probably altered diabase, had, ill 1887, the appearance shown in the accompanying diagram (fig. 4). The contact relations of the limestones with the schists which inclose them have not been satisfactorily determined, by reason of the lack of good exposures. So far as the evidence yet obtained goes, the limestones appear to be of sedimentary origin, though no trace of fossils has been found in them. The lack of continuity in tlie exposures is probably due to com- pressive movements in the formation of a closely folded series. It is probable that the ovoidal form of the outcrops as represented on maps would have to be made elliptical, or even pointed at the ends, if better exposures existed. On the hypothesis of close folding, which alone can account for the , _ . ffreat breadth of outcrop of this series on the western side of the <y^^^/\^'^y^ Carboniferous basin, the thicker 'tMy. Ay6A/7' limestones, if newer than the slates, '"^ JyZ A. 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, 1865-1925; Foerste, Aug. F. (Aug. Frederic), 1862-1936. Washington, Govt. Print. Off.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectgeology
