An area (hole, shaft, cavity) dug out by humans for storage, food preparation, refuse disposal, etc. These include are storage pits/silos, rubbish dumps or 'borrow pits', and remains of pit dwellings. When left undisturbed by man, pits erode and fill, in a similar sequence to ditches. Frequently they have been used for waste disposal and contain large quantities of food debris and rubbish from hearths.