190 GEOLOGY OF THE ISTARKAUANSETT BASIN. 



ENE.-WSW., and dip to the NNW. 53°," is, in my opinion, approximately 

 accurate. 



Both C. T. Jackson and Edward Hitchcock agree in giving a northerly 

 dip to the rocks at this point, from which it is evident that the Mansfield 

 coal beds occur on the south flank of a syncline, and may be expected to 

 reappear on the northern side of the axis or in the vicinity of the Junction. 

 The probabilities are, however, that the sediments in this direction become 

 coarser as the shore line is approached, and that the coal beds either thin or 

 entirely disappear. The coal in Foxboro reported by Edward Hitchcock, 

 nevertheless, may be a reappearance of the coal on the northern side of 

 the axis. 



One and a half miles south-southeast from West Mansfield Station, in 

 the Taunton quadrangle, red and gray sandy slates occur with nearly 

 vertical dips striking N. 64° E., indicating, along with other outcrops 

 described in connection with that atlas sheet, the much steeper southern 

 side of the syncline and the passage to the adjoining anticline. The accom- 

 panying section (fig. 27) represents the known and inferred portions of the 

 structure through the Mansfield area: 



Fig. 27 Section of the Mansfield Coal Measures. The lines represent observed beds and their underground extension 



A, Foolish Hill granitite; B. "Wainsutta series; C, Mansfield Junction. D, West Mansfield mines. B, vertical strata 

 south-southeast of last. 



Analyses of two coals met with at depths of about 90 and 850 feet, 

 respectively, in a boring put down near the old Hardon mine, have been 



