94 CONTENTS. 



Page. 



Chapter V. — The Carboniferous strata 133 



Determination of horizons within the basin 133 



Means of determining superposition 133 



Tabular view of the strata in the Narragansett Basin 134 



Formations below the Coal Measures 135 



Pondville group 135 



Basal arkose beds 135 



Foolish Hill exposures 135 



North Attleboro exposures 135 



Pierces Pasture iu Pondville, Norfolk County Basin 135 



Absence of basal granitic conglomerates 136 



Geographical conditions indicated by the basal arkose , 137 



Absence of iron oxides iu the basal arkose 138 



Absence of carbonaceous matter along northern margin 139 



Extent of arkose zone 139 



Suprabasal conglomerates 140 



Millers Paver conglomerate - HO 



South Attleboro exposure 140 



Jenks Park exposure in Pawtucket --- ■ 141 



Wamsutta group HI 



Red rock areas - 142 



Area along the northern border 143 



Gray sandstones of the northern border 144 



North Attleboro area 145 



Conglomerates 146 



Sandstones 147 



Shales '47 



Central Falls area ' 147 



Pawtucket area 148 



Red beds in Attleboro, Rehoboth, and Norton 148 



Norfolk County area 148 



South Attleboro limestone bed 149 



Attleboro sandstone 151 



Igneous associates of the Wamsutta group 152 



Diabase 152 



Quartz-porphry group 153 



Diamond Hill quartz mass 155 



Wamsutta volcanoes 155 



Folding of the Wamsutta group 156 



Flora of the Wamsutta group - 158 



Coal Measures 159 



Cranston beds 159 



Providence area 159 



Pawtucket shales 162 



Sockanosset sandstones 163 



East Side area in Providence 163 



Tenmile River beds 164 



Lebanon Mills exposure 164 



East Providence area 164 



Leonards Corner quarries 165 



Section from Watchemocket Cove to Riverside 165 



Halsey Farm section at Silver Spring 166 



Exposures in Seekonk 168 



Hunts Mills section 169 



Perrins anticline 169 



Bored well near Lebanon Mills 170 



