18th October 2012, 09:21 AM
Might let you off on rock - as long as the bedding-planes look ok. Anyway chalk's easy, get yourself an antler pick and call it 'experimental archaeology'. A lot of stuff gets missed on gravel site evaluations since gravel-filled features can often only be recognised in plan over a larger area -some of the stuff on my pet quarry can only be seen from 30m away in the right light and from the top of a topsoil bund for instance, and a few things have only been recognised from kite photos, couldn't see a thing close up at ground level (this includes a major timber circle, scary what must get missed on a lot of sites!)