The land that comprises Fairbourne and lower Friog were formed by glacial deposits and built up sand deposited by tidal action. Tidal action over thousands of years built up the shingle bank that stretched from the Friog cliffs in the South across the front of Fairbourne, ending in a sand spit opposite Abermaw (Barmouth) on the shores of the Mawddach estuary.
Bit of a random cache placing here but felt like one was needed as it's called the Fairbourne Flier after all. You are looking for a ceramic container with a plastic tube under a couple of stones. Tweezers recommended.