The Baykonurian glaciation was a glacial period during the Ediacaran Period. It lasted from around 547 to 540 million years ago. The glaciation is posited as a contributor to the Cambrian explosion. Its deposits are known in regions of Asia and Africa, and it apparently affected both palaeohemispheres. Glacial deposits possibly related to this glaciation have been found to be dated between 549 and 530 Mya. It is named for the Baykonur Formation in Central Asia.