Holland-on-Sea Cliff Holland-on-Sea Cliff Holland-on-Sea Cliff is a 0.1 hectare geological Site of Special Scientific Interest in Holland-on-Sea, north-west of Clacton-on-Sea in Essex. It is a Geological Conservation Review site. This site is of great importance in understanding the evolution of the London Basin, and it is the type site for two different gravels. The "Lower Holland Gravel" was the final terrace laid down by the River Thames before the river was diverted south during the Anglian glaciation around 450,000 years ago. The "Upper Thames Gravel" was deposited when the Thames was blocked by ice and not reaching the area. As the
Rhos-on-Sea Rhos-on-Sea Rhos-on-Sea (), also known as "Rhos" or "Llandrillo", is a seaside resort and community in Conwy County Borough, Wales. The population was 7,110 in 2001, increasing to 7,593 at the 2011 census. It adjoins Colwyn Bay. It is named after the Welsh kingdom of Rhos established there in late Roman times as a sub-kingdom of Gwynedd, and later became a cantref (hundred). Bryn Euryn is a hill overlooking Rhos-on-Sea on which there are the remains of a hillfort called Dinerth, the 'fort of the bear', and a limestone quarry. Ednyfed Fychan, 13th century seneschal to Llywelyn the Great and