Figure 26. Side-scan sonograph showing several erect trees in a 75 tn length on the bottom of Spirit Lake. The vertical streaks are sonar shadows cast upon the bottom of the lake by upright stumps. Scattered wood debris is also visible. This illustration first appeared in: Coffin HG. 1987. Sonar and scuba survey of a submerged allochthonous 'forest" in Spirit Lake, Washington. Palaios 2:178.180. Reprinted with permission of the Society of Economic Paleontologists and Mineralogists.