. Geology of the Narragansett basin. Geology. Fig. 26 —Geological section of Plainville Valley and thrust plane the Blake Hill block. Both sets of strata belong to the Coal Measures' but the evidence from fossils so far found is not sufficient to determine the relative position in the normal sequence of beds. The Mansfield syncline is overturned between North Attleboro and Shepardsville, and the evidence in the field points to strong pressure exerted from the south and east upon this i-egion. It was probably a result of this pressure that the Blake Hill block was thrust northward upon the edge
. Geology of the Narragansett basin. Geology. Fig. 26 —Geological section of Plainville Valley and thrust plane the Blake Hill block. Both sets of strata belong to the Coal Measures' but the evidence from fossils so far found is not sufficient to determine the relative position in the normal sequence of beds. The Mansfield syncline is overturned between North Attleboro and Shepardsville, and the evidence in the field points to strong pressure exerted from the south and east upon this i-egion. It was probably a result of this pressure that the Blake Hill block was thrust northward upon the edges of the broken Mansfield syncline. The position of the strata in the Blake Hill block in the system of folds before these were broken is hope- lessly lost in the diverse sti-ucture of this troubled and now deeply eroded area. Faults occur in the Blake Hill block west of the Plainville thrust plane and parallel with its outcrop. They are developed on a small scale. These faults are shown by two classes of facts: (1) The monoclinal ridges of hard sandstone and quartzose conglomerate which strike northwest are 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, 1865-1925; Foerste, Aug. F. (Aug. Frederic), 1862-1936. Washington, Govt. Print. Off.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectgeology
