Extended Data Fig. 6: Boundary of the Cimmeria-Sirenum block with >50 km thick crustal regions indicated in green (c-d).
From: A thick crustal block revealed by reconstructions of early Mars highlands
The question mark to the east of the block indicates the unclear boundary between the Thaumasia region and the Cimmeria-Sirenum block due to the possible different origin of Thaumasia19.
