“…The very fine mineral material might also be carried into the houses on the soles of feet or as an airborne dust (Macphail et al, 1990;Milek, 1997). The presence of the small pit features within studied features is, on one side, an indirect indicator showing that the floors were maintained, disturbed in some way and not really covered by a wooden floor (compare with Miller et al, 1998) or skin (Jones et al, 2010). On the other hand, however, holes in the wooden floor would provide additional support to sticks or bars purposely and repeatedly driven into the sediment below.…”