OuderdomAge (Ma)(Ma) Era System Series Stage Groups in the subsurface of the Netherlands Tectonic phase Holocene 0 Quaternary Pleistocene Gelasian Piacenzian Pliocene Zanclean Messinian 10 Tortonian Upper North Sea Group - NU Neogene Serravallian Miocene Langhian Burdigalian 20 Aquitanian Savian Chattian Oligocene Middle North Sea Group - NM 30 Rupelian Priabonian Pyrenean Bartonian 40 CENOZOIC Paleogene Eocene Lutetian Lower North Sea Group - NL 50 Ypresian North Sea Supergroup - N Thanetian 60 Paleocene Selandian Danian Laramide Maastrichtian 70 Campanian 80 Upper Chalk Group - CK Santonian Sub-Hercynian Coniacian 90 Turonian Cenomanian 100 Cretaceous Albian Rijnland Group - KN 110 Aptian 120 Austrian Lower Barremian 130 Hauterivian Valanginian 140 Berriasian Late Portlandian Upper Jurassic groups Kimmerian 150 SL Upper Kimmeridgian SG, SK, SL Upper Super- Jurassic Oxfordian group - S 160 Callovian Bathonian MESOZOIC 170 Middle Bajocian Mid-Kimmerian Jurassic Aalenian 180 Toarcian Lower Pliensbachian Altena Group - AT 190 Sinemurian Hettangian 200 Rhaetian 210 Early Kimmerian Norian 220 Upper Upper Germanic Trias Group - RN Triassic 230 Carnian 240 Ladinian Middle Anisian Olenekian Hardegsen 250 Lower Induan Lower Germanic Trias Group - RB Changhsian Lopingian Wuchiapingian Zechstein Group - ZE 260 Upper Rotliegend Group - RO Capitanian Guadalupian Wordian 270 Roadian Kungurian Lower Rotliegend Permian Group - RV 280 Artinskian Saalian Cisuralian 290 Sakmarian Asselian 300 Variscan Stephanian 310 Pennsylvanian Westphalian Limburg Group - DC (~Silesian) 320 Namurian Carbonif- Serpukhovian Sudetian 330 erous Visean Carboniferous Limestone 340 Mississippian Farne Group - CF (~Dinantian) Group - CL 350 Tournaisian 360 PALEOZOIC Bretonian Famennian 370 Upper Old Red Group - OR Frasnian Banjaard group (inf.) - OB 380 ? ? Givetian Devonian Middle Acadian 390 Eifelian ? ? 400 Emsian Lower 410 Pragian Lochkovian 420 Pridoli ? ? ? ? Scandian Ludfordian Ludlow Gorstian Silurian - OS 430 Wenlock Homerian Silurian Sheinwoodian ? ? ? ? Telychian 440 Llandovery Aeronian Rhuddanian TNO-GSN 2019/12.