19th March 2014, 09:37 PM
Marc Berger Wrote:I was kinda presuming that when you start an excavation that gravity informed you which way was down and that this would then orientate the stratigraphic terms lowest and bottom.
The original face of the surface that you are excavating or examining orientates which way is "down".
This is all covered in Principles, I think you can still download it for free.