USGS: Geological Survey Bulletin 1359: Geology and Mineral Resources of the Northern Part of the North Cascades National Park, Washington (Contents)

Geological Survey Bulletin 1359

Geology and Mineral Resources of the Northern Part of the North Cascades National Park, Washington

TABLE OF CONTENTS

Cover

Abstract

Introduction

Location and geography
Previous geologic studies
Present studies
Acknowledgments

Geology, by Mortimer H. Staatz, Rowland W. Tabor, Paul L. Weis, and Jacques F. Robertson

Rocks in the eastern part of the area
   Custer Gneiss of McTaggart and Thompson (1967)
      Light-colored gneiss
      Banded gneiss
      Amphibole-rich gneiss
      Origin and age
   Metagabbro
   Phyllite and schist of Ross Lake
   Hozomeen Group of Cairnes (1944)
   Skagit Volcanics
Rocks in the western part of the areas
   Greenschist and phyllite of Mount Shuksan
   Chuckanut Formation
   Hannegan Volcanics
Chilliwack composite batholith
Glaciation
Structure

Mineral resources, by Mortimer H. Staatz, Rowland W. Tabor, Paul L. Weis, Jacques F. Robertson, Ronald M. Van Noy, and Eldon C. Pattee

Setting
Geochemical exploration
Mineral occurrences
   Disseminated sulfides
   Veins
   Placers
Description of mineralized areas
   Silver Creek area
   Pass Creek area
   Red Face Mountain area
   Little Beaver Creek area
   Arctic Creek area
   Luna Creek area
   Big Beaver Creek area
   West side of Picket Range between Mount Challenger and Mount Fury
   Pioneer Ridge
   Bacon Peak area
   Sulphide basin area
   Depot Creek area
   Bear Creek area
   Indian Creek area
   Easy Ridge
   Easy Creek area
   Little Fork of the Chilliwack River area
   Chilliwack River area
   Hannegan Pass—Ruth Mountain area
   Silesia Creek area
   West Fork of Silesia Creek area

References cited

Index (omitted from the online edition)

Steep north face of the southern Picket Range. Small glaciers cling precariously to narrow chutes between towering spires. McMillan Creek behind the low ridge in foreground.

ILLUSTRATIONS

PLATE

1. Geologic map of the northern part of the North Cascades National Park (omitted from the online edition)

2. Sample locality map of the northern part of the North Cascades National Park (omitted from the online edition)

FIGURE

FRONTISPIECE. Steep north face of southern Picket Range
1. Index map showing location of the North Cascades National Park

2—8. Photographs showing—

2. Glaciers in the North Cascades National Park
3. Custer Gneiss overlain by Skagit Volcanics
4. Custer Gneiss rock types
5. Custer Gneiss rock types
6. Thin-bedded chert in the Hozomeen Group
7. Well-foliated greenschist
8. Crinkled phyllite
9. Map of Bacon Peak—Hagan Mountain area
10. Map of Sulphide basin area

11—17. Photographs showing:

11. Arkoses interbedded with thin beds of black argillite of the Chuckanut Formation
12. Hannegan Volcanics
13. Well-jointed quartz monzonite of the Chilliwack composite batholith
14. Sheared quartz diorite of the Chilliwack composite batholith 38
15. Rocks of the Chilliwack composite batholith
16. Glacial features in North Cascades National Park
17. Glaciers in North Cascades National Park
18. Map showing workings on the Weezie claim
19. Map showing Red Face Mountain and Pass Creek areas
20. Map showing Union Prospect in Sulphide basin

TABLE

1. Analyses of samples from the northern part of the North Cascades National Park (omitted from the online edition)

UNITED STATES DEPARTMENT OF THE INTERIOR
ROGERS C. B. MORTON, Secretary

GEOLOGICAL SURVEY
V. E. McKelvey, Director

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Last Updated: 28-Mar-2006