Answer: middens

AnswerCrossword Clue
MIDDENSRefuse heaps.
MIDDENSKitchen ... (anc. mounds)
MIDDENSRefuse heaps
middensMIDDEN, a dunghill (a heap of manure)
middensmound consisting of shells of edible mollusks and other refuse, marking the site of a prehistoric human habitation
middensdunghill or refuse heap