Tranrossan Bay is located in Donegal on Ireland's exposed northwest coast. The bay faces west into the prevailing swell, which together with a 3.5 m spring tide range maintains a wide tide-modified beach with low tide rips. This view shows the beach at high tide with waves breaking across the 150 m wide low gradient surf zone. While the main beach and surf zone are sandy, the small beaches in the foreground are composed of cobbles with a sand surf zone. One hundred and fifty meter high Gortnalughoge mountains, composed of metamorphic rocks, dominate the left horizon, with a township of the same name located in its lee. (Photograph taken 18 September 2013 by Andrew D. Short, School of Geosciences, University of Sydney, Australia.)