CONTENTS OF VOLUME I. 



PAGE 



Preliminary Report to Governors Hall and 



Fairbanks, 9 



General principles of geology, ... 18 



Stratified and unstratified rocks, . . 18 



Surface geology, 20 



Palaeontology, 20 



Metamorphism of rocks, .... 22 



Agents of metamorphism, ... 23 



Former plastic condition of the rocks, . 26 



Conglomerates changed into schists, . . 28 



Classification of rocks, 52 



PART 1. 



Alluvial and tertiary rocks : Alluvium, . 55 



Drift, 56 



Form and size of bowlders, ... 56 



Trains of bowlders, 64 



Striation, embossment, &c., ... 65 



Table of drift and glacier strife, . . 66 



Predominant courses of the strise, . . 78 



Striation by ancient glaciers, ... 82 



Fractured and crushed ledges of rocks, . 87 



Iceberg theory of drift, .... 90 



Phenomena of modified drift, ... 93 



Terraces and beaches, .... 93 



Details on the rivers of Vermont, . . 103 



Around the lakes, 146 



Moraine terraces, 150 



Ancient sea beaches, .... 152 



Ancient sea bottoms, .... 154 



Champlain clays, ..... 156 



Fossil whale, &c., in Ve'rmont, . . 162 



Beds of Marl, 167 



Silicious infusoria, . 172 



Fossil elephant, &c., .... 176 



Theory of the origin of beaches, terraces, &c., 180 



Lake ramparts, 191 



Deposit of frozen gravel and the frozen well, 192 



Erosions of the earth's surface, . . . 208 



Gorge at Bellows Falls, ... 209 



At Brattleboro, 211 



Deserted river beds, .... 211 



Pot-holes, 216 



Purgatories and ancient gorges, . . 217 



Amount of erosion, 221 



Denuded strata, 



Proof from the unstratified rocks, . . 224 



Tertiary strata, . . . 226 

 Fossil fruits, . 

 Are these strata tertiary ? 



Concretions, 240 



Origin of the quartz fragments in the coal, 248 



Simple minerals, 



PART II. 



Hypozoic and palseozoic rocks, 

 Laurentian and hypozoic gneiss, 

 Potsdam sandstones, 

 Calciferous sandrock, 

 Chazy limestone, 

 Birdseye limestone, 

 Black River limestone, 

 Trenton limestone, 

 Utica slate, .... 

 Hudson River group, 

 Red sandstone series, 

 Quartz rock, 

 Georgia group, 

 Talcose conglomerates, . 

 Eolian limestone, 

 Talcoid schists, 

 The Taconic system, 

 Upper Hclderberg limestone, 



251 

 257 

 264 

 266 

 272 

 279 

 280 

 281 

 301 

 308 

 326 

 342 

 357 

 386 

 394 

 424 

 434 

 447 



