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In page Glamorgan:

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The coastline of Glamorgan stretched for 88 miles[citation needed] from Trowbridge in the east to Gower in the west. It was divided naturally into three distinct sections.[1] The coast of the Vale of Glamorgan was mainly characterised by cliffs, while from Porthcawl to Swansea Bay wide sandy shores prevail. The final section, the Gower coast, was made up of a rugged and serrated peninsula.[2]