The age of the peat, or 'lignite', layer in the Port Durnford Formation on the Zululand coast has been established to be about 70 kyr by means of the Th-230/U-234 disequilibrium dating technique. This date places the pent temporally at the beginning of Isotope Stage 4, which is compatible with the palynological interpretation presented previously.
Reference:
Oschadleus, HD, Vogel, JC and Scott, L. Radiometric date for the Port Durnford peat and development of yellow-wood forest along the South African east coast. South African Journal of Science, vol. 92(1), pp 43-45
Oschadleus, H., Vogel, J., & Scott, L. (1996). Radiometric date for the Port Durnford peat and development of yellow-wood forest along the South African east coast. http://hdl.handle.net/10204/575
Oschadleus, HD, JC Vogel, and L Scott "Radiometric date for the Port Durnford peat and development of yellow-wood forest along the South African east coast." (1996) http://hdl.handle.net/10204/575
Oschadleus H, Vogel J, Scott L. Radiometric date for the Port Durnford peat and development of yellow-wood forest along the South African east coast. 1996; http://hdl.handle.net/10204/575.
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