*2.4. Cluster Analysis*

Unsupervised classification of the processed data was conducted to semi-automatically delineate stratigraphical (sub)units from (i) the image data and their derivatives and (ii) multiple parameters of the sedimentological data. This type of classification does not require the definition of training areas and, thus, assumptions prior to the performance of the classification; it therefore excludes the researcher's subjective perception [12]. The on-site delineation by local archaeological experts in combination with the results of the quantitative sedimentological analyses was used as a reference to discuss the quality of the results.
