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The Philipi Peatland in the Drama Basin in north-east Greece has a thickness of 190 metres, the peat layers are partly interspersed with other river sediments and some are of volcanic origin. The peatland has developed over the last 1-1.35 million years.

Source:

Christanis, K. (2018). The Philippi Peatland (Greece). In: Finlayson, C., Milton, G., Prentice, R., Davidson, N. (eds) The Wetland Book. Springer, Dordrecht. doi.org/10.1007/978-94-007-4001-3_147 at: https://link.springer.com/content/pdf/10.1007/978-94-007-4001-3_147.pdf (last accessed on 08/05/2023)