Fig. 6 in The Alvarez impact theory of mass extinction; limits to its applicability and the "great expectations syndrome"

Fig. 6. The Late Triassic cratering record plotted against extinction events (based on Lucas and Tanner 2008: fig. 8; crater dates modified after Schmieder and Buchner 2008 and Martin Schmieder personal communication, 2011) and two alternative time scales. Note that the 100 km−sized and precisely dated Manicouagan crater (214.56±0.05 Ma; see ottawa−rasc.ca/wiki/index.php?title=Odale−Articles− Manicouagan) is within the age range of the end−Carnian extinction only in the ICS 2009 geochronologic scheme (see also Lucas et al. 2012). Carbon isotope events compiled from Tanner (2010) and Ruhl and Kürschner (2011: fig.1). Vertical lines correspond to possible temporal ranges. J., Jurassic.