GnomeKing Wrote:.......I am strongly in favour of more rigours approach to top-soil/sub-soil investigation/removal - for example sometimes really very inexperienced people are put in charge of machine watching, and many managers/PO's etc are not well versed in pedology and geomorphology....equally so for curators...this impacts negatively on primary stages of some site investigation and machine stripping...effectively put severe restrictions on some classes of evidence
i am sure i am not completetly alone in this belief and perhapes an action group could compile some technical evidence and information?...
In my experience, on most sites, the sub-soils and topsoil are replaced after construction, resulting in very little loss of information. However I do take your point on some sites where it isn't.
On a commercial project, its about mitigating damage or destruction of information. Mitigation starts with preservation in situ, then moves onto preservation by record, the sample resucued is dictated by impact and the significance of what is impacted upon.
Hence, for a pipeline or road cutting across say a section of a field boundary ditch a 10% or 20% sample is sufficient, but 100% of a burial feature is appropriate.
I'd imagine for most (not all) soil/sub-soil profiles on most jobs, the construction damage is minimal compared to the size of the evidence, hence it has a very low priority compared to any aechaeological remins beneath.
This is why they are normally machined off.
However, some soil profiles do hold valuable information, so in this case (in my experience) sample sections are often recorded, sampled and examined by an expert
I wouldn't agree that on most sites that valuable information is being lost by stripping topsoil by machine. Although I don't know the specifics of the examples you mean