CONTENTS. ix 



Chapter VIII. — Thi> b:iii(l8 of Silurian schists nu the east side of the valley — Continued. Puff- 

 The great central syucline — Continued. 



South Orange and New Salem 11.30 



Prescott and Enfield 232 



Structure 232 



Petrographical descriptions 233 



The eastern syncliue 234 



Orange and Athol 234 



General description 234 



Metamorpliism of the aniphibolite hand as it is involved in the grauitife of the 



Athol hatholite, and its later change to steatite 236 



Ware 237 



General description 237 



Petrographical description 238 



The Hardwick gneiss 239 



Petrographical description 240 



Palmer 241 



Monson - 241 



The zone of contact around the Belchertown tnnalite 243 



The pyroxenic araphiholites 243 



The fibrolite-schist inclusions 2-16 



Petrographical description 246 



The Wilbraham syncline 248 



The Monson syncline - 249 



The East Greenwich-Enfield syncline 2'A 



E^sumc 251 



Argument I'or the identity of the schist series east of the Connecticut with those on the 



west 251 



The passage e;istward into the Brinifield fibrolite-schist 2.52 



Chapter IX. — The Bernardston series of Upper Devonian rocks 253 



Literature 253 



History 254 



Upper Devonian age of the Bernardston fossils 259 



Description of the region 260 



The relation of the Bernardston series to the argillite 261 



The Williams farm section; the fossiliferous limestone: proof that the whole series is 



Devonian 262 



Descrijition of the range from Bernardston to South Vernon 272 



The feldspathic quartzite 282 



The Bernardston series east of the Connecticut 284 



The original character of the series and its metamorphism 285 



Petrographical description 287 



The quartzite series 287 



Amphibolite associated with the limestone in the gneissoid quartzite 290 



The mica and amphibolite series 291 



Rocks at the month of Jlillers River 295 



