Chapters

1. Introduction

• Geologic Setting and Previous Work

2. Basalt Flow Stratigraphy

• Grande Ronde Flows
• Post-Grande Ronde Flows
• Feeder Dikes

3. Structure

• Faults Coincident with the Olympic-Wallowa Lineament
• The Hite Fault System
• Blue Mountains Uplift
• Graben Related Faults
• Shallowly Dipping Faults
• Wanapum Basalt Feeder Dikes
• Interaction Between the Major Fault Systems
• Discussion

4. Conclusions

References

Appendices

A. Descriptions of the five principal stratigraphic sections

B. Chemical analyses by XRF of basalt flows and dikes

C. Slickenside and fault plane data

D. Procedure for field use of the portable fluxgate magnetometer

E. Road log for Tiger Creek Road with fault outcrop descriptions

F. Fault outcrop descriptions for Maps 3 and 4

Abstract of poster presentation derived from this thesis

Complete contents of poster presentation derived from this thesis

Sample location maps

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LIST OF MAPS

1. Compilation of faults and lineaments for a portion of the Pendleton, Oregon, quadrangle
   Map 1 at 50%, file size=147k
   Map 1 at 100%, file size=526k
2. Geologic map of the Tiger Creek area
   Map 2 at 50%, file size=136k
   Map 2 at 100%, file size=512k
3. Geologic map of the Walla Walla River area - western half
   Map 3 at 50%, file size=124k
   Map 3 at 100%, file size=425k
4. Geologic map of the Walla Walla River area - eastern half
   Map 4 at 50%, file size=159k
   Map 4 at 100%, file size=555k