ILLUSTRATIONS 



Plate I. Outline map of Alaska, showing areas covered by larger scale maps 11 



II Topographic reconnaissance map of northern Alaska 3S 



III. Geologic reconnaissance map of northern Alaska 40 



IV. A, Inland edge of Anaktuvuk Plateau and north base of Endicott Mountains; B, 



Lisburne limestone and Fickett series in Endicott Mountains at head of John 



River 42 



V. Sketch map of Cape Lisburne region, showing coast line and localities of coal deposits. 44 

 VI. A, Topography of John River Valley in Endicott Mountains, from near south 

 edge of Fickett series; B, Glaciated side slopes of John River Valley in Endicott 



Mountains - - - - - 46 



VII. A and B, Bisected view of Endicott Plateau and Endicott Mountains carved from it.. 4(5 

 VIII. A, B, C, D, Bisected view of Colville River bluffs in Tertiary coastal plain of Col- 



ville series 4S 



IX. A, Arctic coast and edge of moss-covered Arctic Coastal Plain; J3, Skajit lime- 

 stone on John River in Endicott Mountains 50 



X. A, Xorth edge of Skajit limestone, dipping north, on John River in Endicott 

 Mountains; B, Lisburne limestone and ground moraine, from Cache Lake, near 

 Anaktuvuk Pass in Endicott Mountains; C, Cape Sabine and undulating plateau; 



D, Cape Halkett, showing ground ice terrane rising 30 feet above tide 56 



XL A, Quartz gash stringer veining in Fickett series on John River in Endicott Moun 



tains; B, Structure in Anaktuvuk series on Anaktuvuk River 70 



XII. A, Base-level feature in Nanushuk series on Anaktuvuk River; B, Structure and 



rapid alternation in bedding in Xanushuk series on Anaktuvuk River 80 



XIII. A and B, Structure in Colville series; C, Coal bed and rocks of Corwin series at 



Corwin mines 82 



XIV. A, Pliocene fossil locality in Colville River bluffs (Colville series); B, Glaciation in 



upper John River Valley in Endicott Mountains 84 



XV. A, Ice remnant of John Valley Glacier in Endicott Mountains; B, Timbered ter- 

 minal moraine resting on Fickett series, on John River , 86 



XVI. A, Barrier reef and Eskimo grave on Arctic coast, near Icy Cape; B, Abandoned 



Pleistocene flats of Colville River showing mounds and lakelets 96 



Fir;. 1. Sketch section of supposed Paleozoic rocks on the coast south of Cape Lisburne 40 



2. Diagrammatic profile showing relations of Endicott, Yukon, and Koyukuk plateaus ... 44 



3. Sketch profile showing structure in Anaktuvuk series on Anaktuvuk River, 10 miles 



above Willow Creek 46 



4. Geologic reconnaissance section on the Arctic divide west of Anaktuvuk Pass 51 



7 



