I like the idea of aging soil transfers , seeing how the 'crust' deteriorates , that's mostly a weathering factor as well i guess. Water transfer , how quickly it dries,disappears. etc.What about scuffs and soil transfers on rocks, roots and fence rails? To answer when someone stood on a root, knocked the moss off, when a fence was climbed, when did someone go from mud puddle to grass or other surface...
What do you reckon the practical time limit is on man tracking, tactical or otherwise?
I'm guessing that these questions are making me think that accurate short term aging of spoor would hasten a chase in a tactical situation or a S-A-R ( finding a lost child ).
The longer term stuff - aging of objects, campfires , Boot prints maybe an indicator to building up an image of deeper duration. (?)
But then again its all on a time spectrum.
Not sure if that makes sense..