Continuous Core Sampling
Continuous core sampling is the only "direct" investigation method included among the non-invasive diagnostic techniques, as, although it does remove a sample of the soil, the size of the latter is negligible compared with the size of the area being investigated (the core samples have a diameter of 10 cm).
The portion of soil extracted at carefully prearranged points allows a direct reading of the stratigraphic situation for the following purposes:
- geomorphological reconstruction of the landscape
- determination of the sedimentary environment and of the conditions
of deposit formation
- demonstration of the presence of anthropic layers
- possibility of removing material contained in the sample (potsherds,
bone fragments, botanical material, etc..) for the purpose of
defining the cultural horizons present, their development and
their chronological determination
- analysis of flora and fauna macroremains and palynological
Combined with geophysical prospecting, core sampling is a useful technique for rapidly ascertaining the nature of given anomalies. In order to evaluate the size of any cavities, previously determined by other methods, it is possible in certain conditions to insert optical fibre instruments in the core cavity.