Bulletin of the United States Geological Survey--The Rampart Gold Placer Region, Alaska . WASHINGTON GOVERNMENT PRINTING OFFICE 1906 Digitized by the Internet Archivein 2013 CONTENTS Page. Geography and Geology, by L. M. Prindle 5 General statement ?_ _ 5 Geography 8 General description 8 Relief 9 Drainage 12 Vegetation 16 Geology 16 General features 16 Stratigraphic succession 17 Sedimentary and metamorphosed formations 18 Pre-Devonian 18 Devonian 18 Carboniferous , 21 Cretaceous 22 Tertiary 22 Quaternary 23 Igneous rocks 23 Granitic rocks 23 Monzon
Bulletin of the United States Geological Survey--The Rampart Gold Placer Region, Alaska . WASHINGTON GOVERNMENT PRINTING OFFICE 1906 Digitized by the Internet Archivein 2013 CONTENTS Page. Geography and Geology, by L. M. Prindle 5 General statement ?_ _ 5 Geography 8 General description 8 Relief 9 Drainage 12 Vegetation 16 Geology 16 General features 16 Stratigraphic succession 17 Sedimentary and metamorphosed formations 18 Pre-Devonian 18 Devonian 18 Carboniferous , 21 Cretaceous 22 Tertiary 22 Quaternary 23 Igneous rocks 23 Granitic rocks 23 Monzonitic rocks 24 Greenstones 24 Basalt 24 Summary 24 The Gold Placers, by F. L. Hess 26 General statement 26 Minook Creek group - 27 Minook Creek 28 High bench 30 Creeks cutting the high bench 31 Hunter 32 Little Minook 33 Little Minook Junior 35 Hoosier 36 Florida 36 Origin of the gold 37 Other tributaries of Minook Creek 37 Ruby 37 Slate 38 Baker Creek group 38 General description - 38 3 4 CONTENTS AND ILLUSTRATIONS. The Gold Placers—Continued. Creek group—Conti
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