Chú thích Tầng Apt

  1. ↑ “ICS Timescale Chart”. www.stratigraphy.org. 
  2. ↑ Gradstein et al. (2004)
  3. ↑ Li, Yong-Xiang; Bralower, Timothy J.; Montañez, Isabel P.; Osleger, David A.; Arthur, Michael A.; Bice, David M.; Herbert, Timothy D.; Erba, Elisabetta; Premoli Silva, Isabella (15 tháng 7 năm 2008). “Toward an orbital chronology for the early Aptian Oceanic Anoxic Event (OAE1a, ~ 120 Ma)”. Earth and Planetary Science Letters 271 (1–4): 88–100. Bibcode:2008E&PSL.271...88L. doi:10.1016/j.epsl.2008.03.055. 
  4. ↑ Leckie, R.; Bralower, T.; Cashman, R. (2002). “Oceanic anoxic events and plankton evolution: Biotic response to tectonic forcing during the mid-Cretaceous” (PDF). Paleoceanography 17 (3): 1–29. Bibcode:2002PalOc..17.1041L. doi:10.1029/2001pa000623. 
  5. ↑ Archangelsky, Sergio. "The Ticó Flora (Patagonia) and the Aptian Extinction Event." Acta Paleobotanica 41(2), 2001, pp. 115-22.

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