Since a few years, archaeologists ask about the function of certain types of pits that typically present a clear narrowing of their base and are rather long and deep, with a sub-vertical base of walls. They usually have a dating that is Neolithic or Bronze Age. Interdisciplinarity and the application of palaeoenvironnemental  disciplines appear to be very useful in order to deliver factual arguments that will permit in the future to discriminate between the  different proposals for their fonctioning and produce the elements of its demonstration. The goal of this contribution is most of all  to open the debate towards such new informations, among others by proposing additional columns for the planned archaeological and environmental  data basis of these pits. This contribution is understood as a complement to the one of Achard et al. on the same subject.