Editing Rochechouart impact structure (section)

== Hypothetical multiple impact event ==
{{main|Manicouagan Reservoir#Hypothetical multiple impact event}}

[[Geophysicist]] David Rowley, working with John Spray and Simon Kelley, suggested that Rochechouart may have been part of a hypothetical multiple impact event which also formed the [[Manicouagan Reservoir|Manicouagan impact structure]] in northern [[Quebec]], [[Saint Martin crater]] in [[Manitoba]], [[Obolon' crater]] in [[Ukraine]], and [[Red Wing crater]] in [[North Dakota]].<ref name="Spray-1998">{{Cite journal |doi = 10.1038/32397|title = Evidence for a late Triassic multiple impact event on Earth|journal = Nature|volume = 392|issue = 6672|pages = 171–173|year = 1998|last1 = Spray|first1 = John G.|last2 = Kelley|first2 = Simon P.|last3 = Rowley|first3 = David B.|bibcode = 1998Natur.392..171S|s2cid = 4413688}}</ref> All of the impact structures had previously been known and studied, but their paleoalignment had never before been demonstrated. Rowley has said that the chance that these impact structures could be aligned like this due to chance are nearly zero.<ref>{{Cite news|url=http://chronicle.uchicago.edu/980319/craters.shtml|title=Crater chain points to impact of fragmented comet|last=Steele|first=Diana|date=19 March 1998|newspaper=University of Chicago Chronicle}}</ref> However, more recent work has found that the craters formed many millions of years apart, with the Saint Martin crater dating to 227.8 ± 1.1 Ma,<ref>{{Cite journal |last1=Schmieder |first1=Martin |last2=Jourdan |first2=Fred |last3=Tohver |first3=Eric |last4=Cloutis |first4=Edward A. |date=November 2014 |title=40Ar/39Ar age of the Lake Saint Martin impact structure (Canada) – Unchaining the Late Triassic terrestrial impact craters |url=https://linkinghub.elsevier.com/retrieve/pii/S0012821X14005445 |journal=Earth and Planetary Science Letters |language=en |volume=406 |pages=37–48 |doi=10.1016/j.epsl.2014.08.037|bibcode=2014E&PSL.406...37S |url-access=subscription }}</ref> while the Manicouagan impact structure dates to around 214 ± 1 million years ago.<ref>{{Cite journal |last1=van Soest |first1=Matthijs C. |last2=Hodges |first2=Kip V. |last3=Wartho |first3=Jo-Anne |last4=Biren |first4=Marc B. |last5=Monteleone |first5=Brian D. |last6=Ramezani |first6=Jahandar |last7=Spray |first7=John G. |last8=Thompson |first8=Lucy M. |date=May 2011 |title=(U-Th)/He dating of terrestrial impact structures: The Manicouagan example: (U-Th)/He DATING OF IMPACT CRATERS |journal=Geochemistry, Geophysics, Geosystems |language=en |volume=12 |issue=5 |pages=n/a |doi=10.1029/2010GC003465|s2cid=129761765 |doi-access=free }}</ref>