LEGEND FOR OREGON MAP SHOWING LOCATIONS OF MATERIALS USED
IN RESEARCH
1. The Dalles clay
2. Othello clay
3. Pendleton pumice
4. Ukiah clay
5. Manganese nodules
6. Cinders
7. Bristol quarry limestone
8. G-1 rock and MA-4
9. Florence beach sand
10. Blodgett rock
11. Elmira clay
12. Hobart Butte clay