Figure 6 in A methane seep from the deep-marine, late Eocene Keasey Formation, Rock Creek, Columbia County, Oregon

Figure 6. Photographs of exposures. A. Upper turbidite bed with meter-stick for scale. Note sharp base of bed. B. Closeup of the base of the upper turbidite bed showing scour channel filled with medium sand. C. Rockfall in predominantly medium- to thick-bedded mudstones 1-3 meters below lower turbidite bed. Blocks in background are pieces of turbidite bed fallen from the bank. D. Lower turbidite bed at a point where it descends to near river level. E. Medium-bedded mudstones at base of stratigraphic section. Upper part of bank exposure is composed of Pleistocene fluvial gravels.