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In these situations, basin or valley alluvial fills containing important archaeological material may be generated and preserved (e.g., ) but the sedimentary archives may be more complex to interpret than those characterising terrace flights, and without deep incision and/or extensive gully formation, the archaeological record may remain largely or completely invisible (e.g., Brink et al., 2012 and Tooth et al., 2013).In addition to these challenges of interpretation and visibility at fluvial archaeological sites, geochronological methods are needed to establish the timing of deposition of different sedimentary packages and to develop conceptual models of site formation (e.g., Tooth et al., 2013 and Lyons et al., 2014).Radiocarbon provides a valuable method back to ∼40 ka, but beyond this range it is commonly difficult to provide a numerical chronology.The original Site C of is thought to have been located near to the foreground of this image but has been eroded by the ongoing meander bend migration.Excavations in 2006 took place at locations shown by arrows on the left of the image where recent erosion had provided near-vertical exposures.), most attention has focused on flights of alluvial river terraces, as these represent former floodplains within which archaeological materials may be preserved and placed in a relative chronology (e.g., Bridgland, 2006 and Gibbon et al., 2009).
A conceptual model for site formation provides the basis for improved interpretation of the generation, preservation, and visibility of the Kalambo archaeological record.