Bu Môr Hafren, â'i gerrynt pwerus, yn ffin rhwng dwy genedl am ganrifoedd, a hyd nes i Bont Hafren gael ei hagor yn 1966, yr unig ffordd i groesi'r aber oedd ar y fferi neu'r twnnel rheilffordd.

English Description: With its powerful tides and one of the highest tidal ranges in the world, the Severn Estuary was a barrier between two nations, and until the Severn Bridge was opened in 1966, the only way to cross the Severn Estuary was by ferry or railway tunnel.

ISBN: 9781445669021

Awdur/Author: Chris Witts

Cyhoeddwr/Publisher: Amberley Publishing

Dyddiad Cyhoeddi/Publication Date: 2017-08-15

Tudalennau/Pages: 96

Iaith/Language: EN

Argaeledd/Availability: Available

Cyfnod Allweddol/Key Stage: X