Two additional attempts to have his doctorate granted were turned back until 1960 when he entered his defense session with an array of sociologists, anthropologists and historians and successfully carried his argument.
After nearly a decade of titanic and herculean effort, Diop had finally won his Docteur es Lettres!
Strontium isotope stratigraphy is now an established technique which provides a numerical age related to a global scale based on the Sr ratio of past seawaters.
Careful selection and preparation of material by experienced Strata Data staff is key to the success of this technique.
In reality the comparison is made with the Global Strandard Strontium Curve using a “look up” table.
Cheikh Anta Diop died quietly in sleep in Dakar, Senegal on February 7, 1986.
Strata Data has for many years offered a strontium isotope dating service to the petroleum industry in collaboration with Isotopic Ltd.
The assumption that the Sr ratio of the world’s oceans has fluctuated uniformly through time has enabled a Global Standard Strontium Curve (GSSC) to be established (Howarth and Mc Arthur, 1997).
Since Sr is taken up by aquatic organisms in equilibrium with the surrounding water it is possible to use their fossilised remains as a proxy for oceanic seawater.