Hemipelagic and Pelagic Basin Plains - Trace Fossils as Indicators of Sedimentary Environments - page 657

FIGURE 4 Modern examples of burrows in oxic deposits without (or with a very low content of)
organic matter. (A) Institute of Geosciences Kiel, core 10148-1 ( 8 40 0 N, 149 30 0 W,
5,100 mwater depth, 202-230 cm, fresh core); note the deeply penetrating vertical burrows (arrow);