China) Upper Fremouw Formation* (Antarctica) Jialingjiang Formation (South China) Moenkopi Formation (Torrey and Wutapki members)* (SW USA) Nanlinghu Formation (Anhui, China) Sanga do Cabral Formation* (Rio Grande do Sul, Brazil) Sludkian Gorizont* (Russia) Sulphur Mountain Formation (British Columbia, Canada) Ustmylian Gorizont* (Russia) Vikinghøgda Formation (Svalbard, Norway) Yarenskian Gorizont* (Russia) * Tentatively assigned to the Olenekian; age estimated primarily via terrestrial tetrapod biostratigraphy (see Triassic land vertebrate faunachrons) References Notes Literature ; 2004: A Geologic Time Scale 2004, Cambridge University Press. ; 1956: Расчленение нижнего отдела триасовой системы на ярусы (Subdivision of the lower series of the Triassic System into stages), Doklady Akademii Nauk SSSR 109(4), pp 842–845 . External links GeoWhen Database - Olenekian Lower Triassic timescale at the website of the subcommission for stratigraphic information of the ICS Lower Triassic timescale at the website of Norges Network of offshore records of geology and stratigraphy. 02 Geological ages Triassic geochronology Geology of Siberia Olenyok basin