Меловой период

Du Vivier A.D.C., Selby D., Sageman B.B., Jarvis I., Gröcke D.R., Voigt S. (2014) Marine 187Os/188Os isotope stratigraphy reveals the interaction of volcanism and ocean circulation during Oceanic Anoxic Event 2 // Earth and Planetary Science Letters. Vol. 389, P. 23–33.

Pdf http://dro.dur.ac.uk/11728/1/11728.pdf