Frasnien Dejonghe al. 2006 Geologica Belgica vol.9 1-2 Monde Frasnian 237 d6 true Frasnian Frasnien false 173 FRAS 242 2022-12-08T06:53:55.054Z 1089 2019-03-25T13:23:22.977Z 2019-03-25T13:21:09.109Z Frasnien 8 h.bressan@brgm.fr Hélène Bressan 2020-11-20T15:40:16.518Z Frasnian