During a wander round the wonderful Preseli area we came across several examples of stone wedges in clefts of rocks.
And even a wedge and apparent hammer stone just waiting to be posed in a convenient crack (no damage to any stone was done, and the tools returned to where they were found)
So are these wedges natural happenstances or old tools, and if so how old?
Mike Parker Pearson's latest book Stonehenge, a Brief History gives some details of the ones he has examined.
Click to embiggen