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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Figure 19

Photograph and sketch of a set of northwest trending near vertical breccia zones associated with an OWL-trend fault (location 21 on Map 3) viewed facing in the direction N50^oE. The apparent slope of the breccia zones results from their cutting the outcrop face at less than 90^o. A stereo plot of the dominantly sub-horizontal slickensides from this location is given in Figure 18.