Extreme temporal interpolation of sparse data is not a sufficient basis to substantiate a claim to have uncovered Pleistocene forest microrefugia.

The article offers information on radiocarbondated charcoal fragments recovered from soils as proof to the claims of uncovering Pleistocene forest microrefugia in the Landes de Gascogne, Western France. It mentions the persistence of Fagus sylvatica or beech in situ in several microrefugia through full glacial and interglacial periods. It is inferred that the dated charcoal evidence is not enough proof to claim the Pleistocene forest microrefugia within a periglacial desert.