...in other cases, there is evidence to suggest that a tomb was entirely cleared of its contents at some stage during its use, with the consequence that the majority of the associated human remains belong to an episode of reuse that occurred at an uncertain interval of time after the initial construction of the tomb. A good example is provided by the allée couverte
(gallery grave) of La Chaussée-Tirancourt in northern France, where a whole layer of burials appears to have been removed, leaving only a handful of inconspicuous bones trodden into the chalk floor of the tomb that the cleaners overlooked.
Source:
Chris Scarre, Rocks of ages : tempo and time in megalithic monuments., European journal of archaeology. (2010)
https://www.academia.edu/1753104/Rocks_of_Ages_Tempo_and_Time_in_Megalithic_Monuments
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