Fig. 1.

Palaeogeography of the Eocene North Sea basins with the ⁸⁷Sr/⁸⁶Sr of recent natural mineral waters overlain. (A–C) Evolution of the paleogeography and sedimentary regime of the paleo North Sea from the early to middle Eocene (edited after Knox et al.¹⁸). The ⁸⁷Sr/⁸⁶Sr of recent natural mineral waters is shown by the coloured symbols (edited after Voerkelius et al.¹⁹). (D,E) Reconstruction of the paleo coast line and sedimentary regime for the Hampshire basin (edited after Knox et al.¹⁸ and Gale et al.²⁰). (F) Reconstruction of the paleo coast line and water depth of the Paris Basin (edited after Gely and Merle²¹ and Sanders et al.²²).