No. 4.— An Excursion to the Grand Canyon of the Colorado. 
By W. M. Davis. 
TABLE OF CONTENTS. 
PAGE 
Introduction at nt esata en + LOS 
Itinerary: |.) '<, 5) 10K) 
Summary of Previous Work lO 
INEwibeLG yates ee ea) ble 
Powellewoct ssh oy st ts yt Le 
Mutton 6 tsk este ees) oe) WTS 
Mnemvockjseriesinne sta ees) pLllo 
Local Names, Maps, ete. . . . 116 
The Great Denudation. . . . . 118 
Two Cycles of Denudation . . 118 
The Mature Valleys of the Kai- 
bab and Coconino Plateaus. 120 
The Landslides of Vermilion and 
HehowChiffe <5 3. 121 
The Migration of Certain Divides 126 
Divide near Pipe Spring . . 126 
Relation of the Pipe Spring 
Divide to the Pipe Spring 
EWING Ge 128 
The Cedar idee Divide chile 
Echo! Cliffs) 5 = . 129 
Migrating Divides in Arid Re 
@IOUSs esl: 130 
The Permian Scxrna andes ihe 
Shinarump Cliffs . . . . 182 
The Development of Talus . 183 
iRerched Bonlders) <7.) 2 =. 134 
Spurs and Ravines ... . 184 
The Stripped Plateaus . . . . 186 
Dates of Displacements . . . . 189 
The Eastern Flexures . . . . 189 
The Earliest Flexures . . 1389 
The Kaibab and the Hicho 
(Raria) Blexures), Jj). 951. 140 
The Crags of Echo Cliffs . . 141 
The Western Faults. . .. . 142 
VOL. XXXVIII. — NO. 4. 
The West Kaibab Faults 
The Toroweap Fault . 
The Sevier Fault Southwest of 
Pipe Spring 
Topographic Effects of Fault. 
ing obliterated or reversed 
by Erosion : 
The Hurricane Fault . 
The Grand Wash Fault . 
The Western Monoclinal Flexures 
The Displacements of the High 
Plateaus : 
Origin of the Drainage Sarat 
General Explanation by Antece- 
dence : 
Replacement of Ratacadedees oF 
Other Explanations F 
The Smaller Streams of the 
Grand Canyon District 
The Streams of the San Rafael 
Swell 
The Summit Valleys of Ha 
Kaibab . 
The Origin of the Gateeaacl in 
the Grand Canyon District . 
The Geological History of the 
Region. . . : 
The Effect of the Rlssuress 
The Effect of the Faults . 
The Bends of the Grand Canyon 
Speculative Character of the 
Preceding Sections 
The Erosion of the Grand @atyon 
The Canyon Cycle 
Comparison of Glen and Marble 
Canyons 
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