Rhosyfelin in its regional stratigraphic context

It should not come as any sort of surprise, but the Quaternary stratigraphy at Rhosyfelin is exactly what we would expect from an inland site affected by the Devensian glaciation.  Here are some diagrams from ancient history (well, from 1970, when I published my "Pembrokeshire" chapter in the Glaciation of Wales book) which show the regional context:

There are of course some regional and local variations dependent upon environmental conditions.  But essentially, the Late Quaternary stratigraphy inland (where clearly we are not going to find raised beaches)  is everywhere dominated by a sequence of deposits numbered 4-8 on the above table.  The Lower Head is a stratified cold-climate slope deposit containing substantial rockfall debris where cliff breakdown was going on in the vicinity; the Irish Sea till and local equivalents represent a real glacial episode in which Devensian ice affected much of Pembrokeshire; the fluvioglacial sands and gravels, with occasional boulder beds and inclusions of flowtill, represent the wastage phase of the Devensian ice; the Upper Head and "rubble drift" accumulated during cold climate conditions following final ice wastage with some reworking during the "cold snaps" referred to as the late-glacial Zones 1 and 3; the sandy loams, colluvium and blown sand are for the most part Holocene materials whose precise characteristics (degree of stratification etc) are determined by local slope and environmental condition; and at the ground surface we find a modern soil horizon infiltrated by root systems and high in humus.

Now let's look at two sections, one from Aber-mawr South and the other from Rhosyfelin:

In both of these sites, the Lower Head is very blocky indeed, with large boulders and slabs that have fallen off the cliffs set in a matrix of finer broken rock materials.  In both cases, these rockfall materials are intercalated with glacial and fluvioglacial materials, indicating that rockfall debris was picked up by overriding ice and also by meltwater, and that rockfalls continued whenever the adjacent rock face was exposed to periglacial processes.  As far as the Upper Head and stratified slope deposits are concerned, they are naturally coarsest close to the rock face and more dominated by sands, gravels and colluvium further away.  A lot of the material in these layers has come from underlying glacial and fluvioglacial materials, and this is why I coined the term "rubble drift" to differentiate it from the "cleaner" upper head deposits elsewhere.

 As I have said before, stratigraphy does not lie, and if you are able to employ an objective eye at Rhosyfelin you will see that there is nothing remotely unusual about this sequence of deposits.  The Holocene deposits contain organic materials and also signs of intermittent human occupation, as we would expect of a sheltered camping and hunting site.  Where on earth did the idea come from that the stratified slope deposits are "archaeological layers"?  They are nothing of the sort.  They are entirely natural, and are located exactly where we geomorphologists expect them to be.