The end-Jurassic transition was originally considered one of eight mass extinctions, but is now considered to be a complex interval of faunal turnover, with the increase in diversity of some groups and decline in others, though the evidence for this is primarily European, probably controlled by changes in eustatic sea level.
The end-Jurassic transition was originally co:nsidered one of eight mass e,xtinctions, but is now considered to be a complex interval of faunal turnover, with the increase in diver!sity of .some gr:oups and decline in others, though the evidence for this is primarily European, probably controlled by changes in eustatic sea level.