The Wye at Builth

Just west of Builth Wells the Wye passes through the rather picturesque Pen-ddol Rocks which my Geological Map suggests are glacial deposits (?) - but there are Dolerite formations nearby (in Radnorshire).

It's a popular fishing location apparently and certainly worth exploration botanically in the spring. I did note a Red Oak among the plantations of Larch nearby (leaves I know only too well from clearing my father's garden of them in Oxford).