VI TABLE OF CONTENTS. 



alternations of elevation and depression The Cretaceous epoch an era of subsidence The Tertiary, of elevation 

 Mogollou Mountains Probably not a distinct system Mountains of the Lower Colorado a part of the Sierra 

 Nevada system Relation of the Sierra Nevada to the Rocky Mountains Cerbat Mountains AVasatch Mountains 

 San Francisco group Recent volcanic phenomena of the Great Central Plateau Mount Taylor Sierra Tucaue 

 Sierras Abajo, La Sal, &c. Structure of the Colorado plateau Devonian and Silurian rocks of the Great CaTion 

 Carboniferous formation Triassic and Cretaceous rocks Similarity of structure of 'the valleys of the, Little 

 Colorado, San Juan, Grand, and Green Rivers High mesas of Navajo country and Upper Sail Juan. 



CHAPTER IV. % 



GEOLOGY OF THE ROUTE FROM SANTA FE TO THE SIERRA DE LA PLATA. 



Structure of the valley of the Rio Grande The valley of the Chama Abiquiu Copper-mines Fossil plants Ruins 

 of Los Caflones Abiquiu Peak Plateau country bordering tins Upper Chama Arroyo Seco Triassic marls 

 Navajo Spring Cretaceous sandstones and plateau Hanks of the Nutria Middle Cretaceous beds Vada del 

 Chama Section of valley of the Chama High mesa of Upper Cretaceous rocks Laguna de los Cavallos Divide 

 between the waters of the Rio Grande and San Juan General view of the structure of the surrounding country 

 Mountain-chains Belt of foot-bills Table-lands Rio Navajo Cerro del Navajo Sierra del Navajo Kito Blanco 

 The Pagosa Sierra San Juan and associated mountain-ranges Cretaceous rocks and fossils The Piedra Parada 

 liio Piedra Broken mesa View from high divide Rio de Los Piuos Sierra de Los Pinos Rio Florido Valley of 

 the Animas Ruins on the Animus Crossing of the Animus Structure of the mountains drained by the Aiiimas 

 Rio de La Plata Delightful camp Cretaceous rocks and fossils Sierra de La Plata Metalliferous veins of the 

 Sierra de La Plata. 



CHAPTER V. 



'GEOLOGY OF THE SAGE PLAIN AND VALLEY OF THK UPPER COLORADO. 



General features of the northern portion of the Colorado basin Aspects and structure of the Sago plain Mesa Verde 

 Enormous denudation of the Colorado plateau Crossing the Sage plain Rio de Los Mancos Rio Dolores Section 

 of Lower Cretaceous rocks Ruins on the Dolores Sierra San Miguel Suronara Tierra lilanca Guajelotcs Canon 

 Pintado Triassic rocks Saurian bones La Senejal Eroded buttes Casa Colorado Ojo Verde Sierra La Sal 

 Excursion to Grand River Canon Colorado Plateau bordering the Colorado River Eroded monuments 

 Labyrinth Canon Ruined buildings Summit of the Carboniferous formation Section of Triassic rocks Remark- 

 able country about the junction of Grand and Green Rivers Singular eroded buttes and pinnacles Net-work of 

 canons Canon of Grand River Section of Carboniferous strata Transverse section of the Colorado Valley 

 Return to Sage plain Journey southward to the San Juan Sierra Abajo. 



CHAPTER. VI. 

 GEOLOGY OF THK BANKS OF THE SAN JUAN. 



General features of the country bordering the San Juan Section of Lower Cretaceous strata south of Sierra Abajo 

 Bird's-eye view of country bordering San Juan High mesas of the Navajo country Triassic rocks of Lower San 

 Juan Lower Cretaceous strata of Camp 37 Middle Cretaceous beds and fossils south of Lo Late The, Needles 

 The Creston Upper Cretaceous strata at mouth of the Animas Ruins in the San Juan Valley Canon Largo 

 Sections of Upper Cretaceous strata Plateau country bordering Canon Largo Buttes of marls and sandstones, 

 highest members of the series of sedimentary rocks composing Colorado plateau General section of Upper Creta- 

 ceous strata Nascimiento Mountain, its structure and relations Notes on the different formations exposed on its 

 sides- Journey through country bordering western base of Nascimionto Mountain Divide between San Juan and 

 Rio Grande Mount Taylor Cabiezou Tertiary strata at Jeinez The Vallos Trap plateaus. 



DESCRIPTIONS OF CRETACEOUS FOSSILS, BY F. B. MEEK. 



DESCRIPTIONS OF CARBONIFEROUS AND TRIASSIC FOSSILS, BY J. S. NEWBERRY, GEOLOGIST OF THE 



EXPEDITION. 



