The blue graph shows the apparent
percentage (not the absolute number) of marine
animal genera becoming extinct during any given time interval. It does not represent all marine species, just those that are readily fossilized. The labels of the traditional "Big Five" extinction events and the more recently recognised
Capitanian mass extinction event are clickable links; see
Extinction event for more details.
(source and image info)
دستاويز سانچو[تخليق]