Figure 4. High-magnification, detailed BSEI photographs. A. Mixed-sediment lamina showing bright silt grains and bright circular coccoliths. B. A burrow fill showing bright silt grains, bright circular coccoliths, and a bright star-shaped discoaster in the bottom right corner. Note the similarity in composition between the burrow fill and the mixed-sediment lamina. C. Two bright, horizontal burrows distorting the dark, enclosing Ethmodiscus lamination and the bright, mixed-sediment lamina above. D. Bright horizontal burrows are distorting the enclosing dark, Ethmodiscus lamina. Between adjacent burrows, the Ethmodiscus fragments are vertical. All scale bars are given in the data zone at the top of the photographs.

Figure 4. High-magnification, detailed BSEI photographs. A. Mixed-sediment lamina showing bright silt grains and bright circular coccoliths. B. A burrow fill showing bright silt grains, bright circular coccoliths, and a bright star-shaped discoaster in the bottom right corner. Note the similarity in composition between the burrow fill and the mixed-sediment lamina. C. Two bright, horizontal burrows distorting the dark, enclosing Ethmodiscus lamination and the bright, mixed-sediment lamina above. D. Bright horizontal burrows are distorting the enclosing dark, Ethmodiscus lamina. Between adjacent burrows, the Ethmodiscus fragments are vertical. All scale bars are given in the data zone at the top of the photographs.