Editing Triassic–Jurassic extinction event (section)

===Sea level fall===
Geological formations in Europe and the Middle East seem to indicate a drop in sea levels at the end of the Triassic associated with the TJME.<ref>{{Cite journal |last=Hallam |first=Anthony |date=September 1997 |title=Estimates of the amount and rate of sea-level change across the Rhaetian—Hettangian and Pliensbachian—Toarcian boundaries (latest Triassic to early Jurassic) |url=https://www.lyellcollection.org/doi/10.1144/gsjgs.154.5.0773 |journal=[[Journal of the Geological Society]] |language=en |volume=154 |issue=5 |pages=773–779 |doi=10.1144/gsjgs.154.5.0773 |issn=0016-7649 |access-date=28 October 2024 |via=Lyell Collection Geological Society Publications}}</ref><ref>{{Cite journal |last1=Urban |first1=Ingrid |last2=Demangel |first2=Isaline |last3=Krystyn |first3=Leopold |last4=Calner |first4=Mikael |last5=Kovács |first5=Zsófia |last6=Gradwohl |first6=Gerit |last7=Lernpeiss |first7=Simon |last8=Maurer |first8=Florian |last9=Richoz |first9=Sylvain |date=1 June 2023 |title=Mid-Norian to Hettangian record and time-specific oolites during the end-Triassic Mass Extinction at Wadi Milaha, Musandam Peninsula, United Arab Emirates |journal=[[Journal of Asian Earth Sciences]] |language=en |volume=9 |pages=100138 |doi=10.1016/j.jaesx.2023.100138 |doi-access=free }}</ref> Although falling sea levels have sometimes been considered a culprit for marine extinctions, evidence is inconclusive since many sea level drops in geological history are not correlated with increased extinctions. However, there is still some evidence that marine life was affected by secondary processes related to falling sea levels, such as decreased oxygenation (caused by sluggish circulation), or increased acidification. These processes do not seem to have been worldwide, with the sea level fall observed in European sediments believed to be not global but regional,<ref>{{cite journal |last1=Fox |first1=Calum P. |last2=Cui |first2=Xingqian |last3=Whiteside |first3=Jessica H. |last4=Olsen |first4=Paul E. |last5=Summons |first5=Roger E. |last6=Grice |first6=Kliti |date=16 November 2020 |title=Molecular and isotopic evidence reveals the end-Triassic carbon isotope excursion is not from massive exogenous light carbon |journal=[[Proceedings of the National Academy of Sciences of the United States of America]] |volume=117 |issue=48 |pages=30171–30178 |bibcode=2020PNAS..11730171F |doi=10.1073/pnas.1917661117 |pmc=7720136 |pmid=33199627 |doi-access=free}}</ref> and with even some European sections showing no sign of sea level fall across the Triassic-Jurassic boundary,<ref>{{Cite journal |last=Gómez |first=Juan J. |last2=Goy |first2=Antonio |last3=Barrón |first3=Eduardo |date=9 February 2007 |title=Events around the Triassic–Jurassic boundary in northern and eastern Spain: A review |url=https://www.sciencedirect.com/science/article/pii/S0031018206004433 |journal=[[Palaeogeography, Palaeoclimatology, Palaeoecology]] |language=en |volume=244 |issue=1-4 |pages=89–110 |doi=10.1016/j.palaeo.2006.06.025 |access-date=19 February 2025 |via=Elsevier Science Direct}}</ref> but they may explain local extinctions in European marine fauna.<ref name="TannerLucas" /> However, it is not universally accepted that even this local diversity drop was caused by sea level fall.<ref>{{Cite journal |last1=Hesselbo |first1=Stephen P. |last2=Robinson |first2=Stuart A. |last3=Surlyk |first3=Finn |date=May 2004 |title=Sea-level change and facies development across potential Triassic–Jurassic boundary horizons, SW Britain |url=https://www.lyellcollection.org/doi/10.1144/0016-764903-033 |journal=[[Journal of the Geological Society]] |language=en |volume=161 |issue=3 |pages=365–379 |doi=10.1144/0016-764903-033 |issn=0016-7649 |access-date=28 October 2024 |via=Lyell Collection Geological Society Publications}}</ref> A pronounced sea level change in latest Triassic records from [[Lake Williston]] in northeastern [[British Columbia]], which was then the northeastern margin of Panthalassa, resulted in an extinction event of infaunal (sediment-dwelling) bivalves, though not epifaunal ones.<ref>{{cite journal |last1=Wignall |first1=Paul B. |last2=Zonneveld |first2=John-Paul |last3=Newton |first3=Robert J. |last4=Amor |first4=K. |last5=Sephton |first5=M. A. |last6=Hartley |first6=S. |date=27 September 2007 |title=The end Triassic mass extinction record of Williston Lake, British Columbia |url=https://www.sciencedirect.com/science/article/abs/pii/S003101820700329X |journal=[[Palaeogeography, Palaeoclimatology, Palaeoecology]] |volume=253 |issue=3–4 |pages=385–406 |bibcode=2007PPP...253..385W |doi=10.1016/j.palaeo.2007.06.020 |access-date=28 May 2023}}</ref>