What was particularly interesting in 2017 was the high concentration of rounded and sub-rounded pebbles and cobbles on the foreshore to the west of the headland. I assumed that there were fluvioglacial gravels in the neighbourhood, and this was confirmed by the geological map, as seen in the BGS online Geology Viewer.
Recently there has been a small landslip on the drift cliff about 50m west of the headland. The cliff is about 15m high, and is much overgrown, but there is a new exposure that shows at least 2m of fluvioglacial gravels overlying brecciated or broken bedrock of shales and mudstones. The lower metre or so of the gravels are iron-stained, but above that they appear fresh and uncemented.
Note added 17 October 2019:
In the Geological Survey Haverfordwest Memoir, p 215, there is a reference to an interesting section on the shore of the Cleddau confluence, immediately to the east of Oxhouse Farm. The location lies between Landshipping Ferry and Landshipping Quay. Grid ref SN007113. The section shows:
Gravelly "boulder-clay" with igneous and other erratics
Blue clay with plant remains and quartz pebbles -- related to the raised beach?
Gravelly rubble becoming more angular downwards
On the geological map an extensive spread of sands and gravels is shown as the surface deposit in this area, so we can assume that it overlies the till.
I need to go and take a look.......