'decomissioning', that was the word I was looking for!
I don't know if you know or can access the info, but is the grooved ware restricted to pits at henge sites?
Mt Pleasant :stone hole and ditch Durrington: in pits but also midden and other contexts .Ballynahatty : pits ,Machrie Moor: refuse pit . Balfarg :ditch
Sarn -Y Bryn -Caled: pit . Another factor is that the greater the number of posts the more likely GW is to be associated , as opposed to Peterborough ware .
It makes me wonder if complete pots were found in one context more than others, how many were associated with burials, and whether the woodhenge post holes you mentioned (D-F) had any other specific feature absent from A-C.
I could go on asking questions for hours, your answers always bring to mind more possibilities, but hardly fair, I should go and search this stuff out myself. Its just finding the time thats the issue!
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Sorry , I have mislead you , Burl suggested that post holes A-C , which did have Beaker sherds (although high in the fill and secondary ) were later than D-F which belonged to the GW phase ( found in the ditch and under the bank ) . A , C and E also had transverse arrowheads confirming a possible temporal association with GW , and making the two phase suggestion problematic .
The size of the assemblage is nearly always sherds often 1-3 ,and when bigger numbers often representing multiple vesels .At Wyke Down it was possible to partially reconstruct three vessels and the there is a reconstucted vessel (20 sherds ?) from Durrington in Salisbury museum .