VI 



BULLETIN OP THE GEOLOGICAL SOCIETY OF AMERICA 



Page 



Plate 10 — Welleb: Fern Glen 

 11 



fauna 327 



Fern Glen fauna 328 



Fern Glen fauna 329 



Fern Glen fauna 330 



Fern Glen fauna 331 



Fern Glen fauna 332 



The Cox and Peyton gravel pits 342 



Teeth of the Gladwin horse 343 



Superior grinders of Equus scotti Gidley 344 



Inferior cheek teeth of fossil horses 346 



Much worn molars and pre-molars of Equus compli- 

 cate Leidy 348 



Fossils of Equus complicate and camel 349 



Fossils of ruminants 350 



Fossils of ruminant and Elephas primigenius 351 



Molar of Elephas imperator 352 



Fossil bones from Aftonian gravels 353 



Superior, lateral, and inferior views of claw of mylo- 



don 354 



Molar of Mammut mirificum Leidy 355 



Sections of coal formations of the Raton field, New Mexico 362 



" Hogback in Verrnejo canyon, New Mexico 363 



" Gliff near Carresso creek and cliff north of Red River 



peak, New Mexico 364 



Swartz : Classes of crystals - 398 



Classes of crystals 398 



: Cox pit east of Missouri valley, Iowa 401 



County-line exposures of Aftonian, section 5, town- 

 ship 81 north, range 44 west 402 



Sections showing position of Aftonian 403 



McGavern pit, south of Missouri valley, Iowa 406 



Exposures showing folded Aftonian gravels 407 



Volcanic sand-blast action on mount Pele" 410 



Volcanic sand-blast action on mount Pele 412 



U-shaped rock gorges of the Souf riere 414 



U-shaped gorges of the Soufriere 415 



Gorges of the Soufriere, Saint Vincent 416 



Wallibu gorge, Soufriere, Saint Vincent 418 



Gorges of the Soufriere, Saint Vincent 420 



Rabaka river, Soufriere, Saint Vincent 424 



46 — Schuchert: Limestone quarries near Buffalo, New York, and 



Louisville, Kentucky 441 



12 

 13 



14 



15 



16 — Calvin 



17 



IS 

 19 

 20 



21 

 22 

 23 

 24 

 25 

 26 



27 



28 — Lee 



29 



30 



31 



32 



33 — Shimek 



34 



35 



36 



37 



38— Hovey : 



39 



40 



41 



42 



43 



44 



43 



47 

 48 

 49 

 50 

 51 

 52 



Quarry face at Newsom, Tennessee 442 



Continental seas of Paleozoic time 447 



Paleozoic positive elements 464 



Explanation of symbols 606 



Upper Georgic 606 



Upper Acadic 606 



