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Data sets Publications Expeditions Thesaurus
Hettangian  search
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....Hettangian
BTChronostratigraphic Units
 .Phanerozoic
 ..Mesozoic
 ...Jurassic
 ....Lower Jurassic
 .....lower Liassic
 ......Hettangian
SNEurope. Above Rhaetian (Triassic), below Sinemurian.