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تاریخ::
تحلیل ریزفرسایش
Microerosion analysis
The rationale of microerosion analysis is that, after a new rock surface has been created, by either natural or anthropic agents, it is subjected to chemical weather ing processes.
It must also be emphasized that microerosion analysis is not one specific method, but a cluster of possible methods around a basic concept.
While microerosion analysis is not thought to pro- vide great accuracy, it is probably more reliable than most alternative methods of dating petroglyphs, and it is certainly cheaper and simpler than most.
The valid arguments against microerosion analysis are that we have inadequate calibration curves for it, that its accuracy is inherently limited, that it can only be applied to certain rock types, and that it is unsuitable where the rock surface may not have been continuously exposed to precipitation (i.e. where it may have been concealed in the past by sediment, mineral accretion etc.).
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