Document Type: Regular Paper
Department of Geology, Faculty of Sciences, Shahid Bahonar University, Kerman, I. R. Iran
A detailed study of Ostracoda changes against the stable isotopes of carbon and oxygen across
the Cenomanian-Turonian boundary mass extinction has been fully documented in one section, the South of
England. This section comprises the uppermost Cenomanian to lowermost Turonian strata. The comparison
between the results obtained in this research and two rival models for the Cenomanian-Turonian boundary
mass extinction, famine and high productivity, have been carried out. Low oxygen level has been proposed as
the main cause of the Cenomanian-Turonian boundary mass extinction.