Click on the "golden spikes" to access the available information on Global Boundary Stratotype Sections and Points.

Base of Maastrichtian GSSP Base of Turonian GSSP Base of Cenomanian GSSP Base of Bajocian GSSP Base of Aalenian GSSP Base of Pliensbachian GSSP Base of Sinemurian GSSP Base of Induan GSSP