Bothnian Bay

Partly overlapping radiographs of of core BO3 from a depth of 110 m (station no. 193) in the Bothnian Bay.

This core is bioturbated (the amphipod Pontoporeia was found at the sediment surface) and contains iron-manganese nodules and concretions. An example of a flat crust of concretions is given by the hard (light) horizontal layer at a core depth of about 0.1 m.

Stereoradiographs of the lower part (core depth 20-43 cm) of core F9 from a depth of 137 m (station no. 194) in the Bothnian Bay.

There is a rather high concentration of iron-manganese nodules in this part of the core.

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Sedimentation-compression curve down to a depth of 42.6 cm in core F9. E.o.p. = effective overburden pressure.

Stereoradiograph of the lower part (core depth 11-34 cm) of core F2X from a depth of 100 m (station no. 195) in the Bothnian Bay.

Flat concretions dominate in the upper and spherical nodules in the lower part of this core.

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