Figure 6. Conical carbonate chimneys (A = chimney #1 and B = 

 chimney #3) dragged from the outer continental shelf off 

 northern Oregon. See figure 2 for location designed chimney 

 field. Note cone-like shape and large internal cavities 

 viewed through openings in the side walls and top. See 

 table 1 and text for detailed description of chimneys. 

 Scale is 1-meter ruler. (After Schroeder et al . 1987). 



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