Querns
These are mills for grinding cereals. The earliest and simplest saddle querns comprise a slab with a stone on the top; the person grinding the grain would straddle the slab. The more sophisticated rotary quern has two circular stones, one above the other; grain fed through a hole in the centre of the top stone was ground between the stones by moving the top one backwards and forwards over the lower one, to emerge as flour around the edges. These 'hand mills' were eventually replaced by the various animal, water and wind mills. Pieces of querns frequently turn up on archaeological sites, and many are made of types of stone which have been brought a very long way from their geological source.

Quoits
In archaeology, an old-fashioned term for some of the impressive stone monuments of the Neolithic and Bronze Ages, particularly communal burial chambers.