Tham khảo Tầng_Hettange

  1. ↑ “International Chronostratigraphic Chart” (PDF). International Commission on Stratigraphy. 2020.
  2. ↑ “Global Boundary Stratotype Section and Point”. International Commission of Stratigraphy. Truy cập ngày 22 tháng 12 năm 2020.
  3. ↑ See for a detailed geologic timescale Gradstein et al. (2004)
  4. ↑ GSSP Table Lưu trữ 2012-11-15 tại Wayback Machine
Văn liệu
  • Gradstein, F.M.; Ogg, J.G. & Smith, A.G.; 2004: A Geologic Time Scale 2004, Cambridge University Press.
  • Renevier, E.: Notices géologiques et paléontologiques sur les Alpes Vaudoises, et les régions environnantes. I. Infralias et Zone à Avicula contorta (Étage Rhaetien) des Alpes Vaudoises Bulletin de la Société Vaudoise des Sciences Naturelles 8, p. 39-97. (tiếng Pháp)

Tài liệu tham khảo

WikiPedia: Tầng_Hettange http://stratigraphy.science.purdue.edu/charts/Time... http://pubs.usgs.gov/fs/2007/3015/fs2007-3015.pdf http://www.stratigraphy.org/GSSP/index.html http://www.stratigraphy.org/ICSchart/ChronostratCh... http://www.stratigraphy.org/ICSchart/ChronostratCh... http://www.stratigraphy.org/bak/geowhen/stages/Het... https://web.archive.org/web/20060518101459/http://... https://web.archive.org/web/20121115175854/http://... https://stratigraphy.org/gssps/ https://commons.wikimedia.org/wiki/Category:Hettan...