identified by scientist Quaternary Holocene recent Greater North Sea Gullmar Fjord FEU-1024203 | identified by scientist Quaternary Pleistocene off Biscaya and Iberia ODP Leg 149 Site 898 FEU-1008396 | identified by M. Hesemann Quaternary Holocene recent Pacific off Alaska Sitka FEU-1023952 | identified by M. Hesemann Quaternary Holocene recent Pacific off Alaska Sitka FEU-1023953 |