Geology and Ore Deposits of the Covada Mining District. Washington.

Bulletin 16 Washington Geological Survey. 1913 94 Pages

Contents:

ILLUSTRATIONS

INTRODUCTION

• Field work and acknowledgments
• Location and area of the district
• Literature

CHAPTER I. PHYSIOGRAPHY

• Topography
• General statement
• Drainage
• Forms of the surface
• Glaciation
• Climate
• Vegetation
• Relation of the present topography to the general geology

CHAPTER II. GENERAL GEOLOGY

• Introduction
• Covada formation
• Areal distribution
• General description
• Meteor granodiorite
• Areal distribution
• General description
• Aplite
• Granodiorite porphyry
• Andesite dikes
• Pyroxenite
• Quaternary
• Structure
• Geological history

CHAPTER III. ECONOMIC GEOLOGY

• History of mining
• Treatment and shipment of ores
• Distribution of the ore bodies
• Character of the ore bodies
• Strike and pitch
• Shape
• Influences of country rock on the ores
• Mineralogy
• Genesis of the ores
• Placer deposits

CHAPTER IV. DETAILED DESCRIPTION OF THE MINING PROPERTIES

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