ceous Creta- Tertiary Quaternary Period Paleogene Neogene cene Holo- Late Oligocene Miocene Pliocene Pleisto- Epoch cene E.Late Early Middle Late Early Late Early Middle Late Early L. Maastrichtian Danian Lutetian Bartonian Priabonian Rupelian Chattian Aquitanian Pretiglian Messinian Brunssumian Reuverian Burdigalian Langhian Serravalian Tortonian Tiglian Age L = Mo = United Kingdom United Corraline Crag Corraline Red Crag Trimley Sands source: BGS&R source: Sand Fm. Than L Thames

Lambeth Gr.Lambeth M= Gr. et Harwich Fm. Harwich Cla London Water Fm. Virginia Beds Bagshot Woolwich Fm. Woolwich Upno Fm. Reading Flambor Montrose Group Montrose Vinke etal.(1988 Vinke R.W.O'. Camer England eastern ? r Fm. ough Chal on etal.(199 B. Knox(per GD (1984 Ormesby Clay Fm. Clay y Fm. ); k Fm. ) ; 2); s. comm. oray Gr.oray Ekofisk Fm. Ekofisk Horda Fm. Horda unnamed Lista Fm. Lista Fm. Sele Fm. Balder North Sea North southern )

Chalk Gr. Mo M Stronsay Group Westray Gr. Nordland Group BM =Brussels MarlMb. (south and cent (south Netherlands Dongen Maastricht Fm. Maastricht Fm Houthem Formation Rupel Formation Formation Breda Fm. Maas Oosterhout BM

Fm. Veldhoven For sluis . Tegelen Fm. Sand Mb.Sand Brussels Fm. Tongeren ral sectors) ral mation Kiesel- oölite Form. Inden Fm.

Ville Form.

Chalk Lower North Sea Group Upper North Sea Group Group Middle North Sea Gr. H-H = H L =Landen Group Diest Forma Diest egu Germany Belgium Lede Format Lede Format Maldegem Merkplas & Brasschaat Sand &Brasschaat Merkplas Maastricht For Maastricht Fm Houthem Formation Heers For Hannut Format Kortrijk Boom Formation Boom Formation Lillo Fm. Berchem Fm. Kattendijk Kemp Zelzate Fm. Zelzate Voort Forma Gent Forma Gent ore eMeut De source: Tielt Formation Aalter Fm. Aalter Tienen Forma en Forma otr adnege(1994 Vandenberghe & Wouters Vink Steurbaut Mare Mare St.Huibrechts-Hern Fm. St.Huibrechts-Hern aine-Haspengouw Gr. aine-Haspengouw ta.(1988 al. et e hl&Lg (1988); Laga & chal hl(1994); chal mation tion tion tion Eigenbilzen Fm. Eigenbilzen tion ion r&Lg (1976) Laga & er Fm. Poederlee . Borgloon Fm. Borgloon Fm. Bilzen Fm. Bolderberg Brussel Fm. Brussel Pa-Bed Formation Opglabeek i rs); press) (in mation ion tion ion Kasterlee Fm. Kasterlee ); Fm. Mol s Zenne Tongeren Rupel H-H L Ieper Gr. Gr. Group Gr. ) * = provisional name * =provisional Grafenberg-Schichten (Lower Rhine area Rhine (Lower Walsum-Sch. Ratingen-Schichten Houthem-Schichten Hückelhoven-Sch. Brückerheide-Sch. Lintfort-Schichten Nütterden-Sch. (Burghof-Sch*) Bislich-Sch. Dingden-Sch. Uedem-Sch. Biemenhorst-Sch. ore Ande source: unnamed Weeze-Sch. Ratheim-Sch. awj Hage & Zagwijn Vink a den Van rfr pr.comm. (pers. Prüfert Hage Sch. Hoerstgen- n(1988 en rfr (1988); Prüfert & r sn(1966) rson Gereonsweiler-Sch. Rotton-Schichten. Bos Reuver-Schichten. Gladbacher Sch Gladbacher h&Hage & ch Hauptkies-Sch. ); Antweiler Sch. Antweiler (1994) r Inden-Sch. ) Schichten ); Bergisch (1984); r Köln- Ville- Sch. Formation Dongen (Achterhoek-Twente area) (Achterhoek-Twente Netherlands ore a den Van source: Rupel Veldhoven Fm. Breda Formation Oosterhout Fm. Fm. Vink a den Van Formation Landen Ratum Mb.Ratum Mb Brinkheurne Mb Winterswijk Aalten Mb. Aalten Mb. Eibergen Mb. Zenderen Mb. Delden Scheemd ta.(1988) al. et e eg&Gaeme & Berg oc ta.(1975); al. et Bosch Fm. a Weerselo Mb. Weerselo s(1993 rs Lievelde hiatus Mb )