Figure F11. Abundant Planolites-type burrows in a whitish color band (interval 192-1185A-6R-2, 33-43 cm; Unit II; Eocene). Most burrows are surrounded by black particles, which may be pyrite grains.

Figure F11. Abundant Planolites-type burrows in a whitish color band (interval 192-1185A-6R-2, 33-43 cm; Unit II; Eocene). Most burrows are surrounded by black particles, which may be pyrite grains.