Produced by Stephen Hutcheson and the Online Distributed Proofreading Team at http://www.pgdp.net [Illustration: Pl. 1. _The Connecticut Valley as it is seen from Mount Sugarloaf._ _The western highland shows through the pine boughs at the extreme right. The eastern highland balances it on the far left. The Holyoke Range hems the basin on the south except at the gap where the river escapes to the Springfield area._] The Flow of Time IN THE CONNECTICUT VALLEY _Geological Imprints_ _by_ GEORGE W. BAIN _and_ HOWARD A. MEYERHOFF The Hampshire Bookshop BOOKSELLERS AND PUBLISHERS NORTHAMPTON, MASS. 1942 COPYRIGHT, 1942, BY THE HAMPSHIRE BOOKSHOP Contents Introduction ix Today and Yesterday 1 _The River Works_ 1 _The Landscape Changes_ 4 _Glaciers Came_ 8 _Just Before the Ice Age_ 9 _Rivers Carried off the Everlasting Hills_ 11 _Before the Rivers Cut the Valleys_ 14 The Mosaic of Central Massachusetts 18 _The Red Rock Basin_ 18 _A Dinosaur Diary_ 21 _Volcanoes_ 23 _The Original Valley_ 28 _Hot Springs in Central Massachusetts_ 30 _The Marginal Uplands_ 30 _The Eastern Upland_ 32 _Coal Swamps in Massachusetts and Rhode Island_ 33 _The Western Upland_ 34 The Story of Central Massachusetts 38 Interesting Places 51 _Mount Lincoln in Pelham_ 51 _Mount Toby_ 52 _The Sunderland Caves_ 55 _Mount Sugarloaf_ 56 _Turners Falls_ 58