The plate was in existence during the
Late Cretaceous epoch and
Paleogene period adjacent to eastern
Marie Byrd Land. Independent plate motion ceased at 61 mya. The boundaries are poorly defined.
References
Eagles, G., K. Gohl and R. D. Larter (2004) Life of the Bellingshausen plate, Geophysical Research Letters, 31, L07603
Abstract
McCarron, Joe J. and Robert D. Larter, Late Cretaceous to early Tertiary subduction history of the Antarctic Peninsula, Journal of the Geological Society, March 1998