In addition to the coprolite evidence, the Paisley Caves have produced other materials that contribute to establishing the site’s occupation history.

Among the most interesting is the evidence from directly dated fiber or organic artifacts recovered from the pre-Clovis layers.

The recovery and dating of fiber artifacts — items made from plant fibers, such as basketry, cordage, or other woven materials — from archaeological contexts is rarely straightforward, because organic materials are among the most vulnerable to post-depositional contamination and degradation.

But when fiber artifacts can be securely dated and their stratigraphic context established, they provide an independent temporal anchor for human occupation that is distinct from both the coprolite evidence and the lithic artifact evidence.

The Paisley Caves produced evidence of twisted fiber — materials consistent with human-made cordage or basketry — from contexts that, based on stratigraphic position and associated radiocarbon dates, appeared to fall within the pre-Clovis or approximately Clovis-age portion of the site’s sequence.