'Golden nail': Quarry near Salzgitter becomes global geological reference point

Scientists from Goethe University Frankfurt, University of Warsaw, State Authority for Mining, Energy and Geology in Hanover, and from other institutions have found in Salzgitter-Salder what researchers have been searching for for more than 20 years: A geological formation that perfectly represents the transition from the Cretaceous Turonian to the Coniacian Age. The former limestone quarry is now considered a global reference point (GSSP) for the turn of the ages 89.4 million years ago.