Photo 37. Looking out to sea from near Pwll Deri, just south of Strumble Head, north Pembrokeshire. Uplift of the land surface of most of Wales in the Late Mesozoic and Tertiary probably eroded away any Cretaceous rocks that were deposited on land, so today we have to look out to sea to find them, buried beneath the waters of the Bristol Channel and Celtic Sea. The strikingly flat landscape in the distance is probably a marine erosion surface cut across Pembrokeshire in the Tertiary period, as explained on the next page.
Photo 37. Looking out to sea from near Pwll Deri, just south of Strumble Head, north Pembrokeshire. Uplift of the land surface of most of Wales in the Late Mesozoic and Tertiary probably eroded away any Cretaceous rocks that were deposited on land, so today we have to look out to sea to find them, buried beneath the waters of the Bristol Channel and Celtic Sea. The strikingly flat landscape in the distance is probably a marine erosion surface cut across Pembrokeshire in the Tertiary period, as explained on the next page.