المراجع
- ↑ https://timescalefoundation.org/gssp/index.php?parentid=all
- ↑ https://stratigraphy.org/gssps/
- ↑ Lucas، Sepncer (6 نوفمبر 2018). "The GSSP Method of Chronostratigraphy: A Critical Review". Frontiers in Earth Science. ج. 6: 191. Bibcode:2018FrEaS...6..191L. DOI:10.3389/feart.2018.00191.
- ↑ Holland، C. (يونيو 1985). "Series and Stages of the Silurian System" (PDF). Episodes. ج. 8 ع. 2: 101–103. DOI:10.18814/epiiugs/1985/v8i2/005. مؤرشف من الأصل (PDF) في 2025-01-25. اطلع عليه بتاريخ 2020-12-11.
- ↑ Jeppsson, L.؛ Calner, M. (2007). "The Silurian Mulde Event and a scenario for secundo—secundo events". Earth and Environmental Science Transactions of the Royal Society of Edinburgh. ج. 93 ع. 02: 135–154. DOI:10.1017/S0263593300000377.
- ↑ Munnecke, A.؛ Samtleben, C.؛ Bickert, T. (2003). "The Ireviken Event in the lower Silurian of Gotland, Sweden-relation to similar Palaeozoic and Proterozoic events". Palaeogeography, Palaeoclimatology, Palaeoecology. ج. 195 ع. 1: 99–124. DOI:10.1016/S0031-0182(03)00304-3.
- ↑ Gradstein, F. M.، المحرر (2012). The Geologic Time Scale 2012. Elsevier Science Ltd. ص. 504. ISBN:978-0444594259.
- ↑ (بالإنجليزية) "International chronostratigraphic chart (2012)" (PDF). http://www.stratigraphy.org/. مؤرشف من الأصل (PDF) في 2023-03-15. .
- ↑ F.M., Gradstein; J.G, Ogg; M., Schmitz; G., Ogg (2012). The Geologic Time Scale 2012 (بالإنجليزية). Elsevier. p. 1176. ISBN:9780444594488.