Geograph - photograph every grid square

From the Erskine Bridge (see NS4672 : Remains of the south jetty for that view), this feature resembles a crannog, and it had been reported as such; this is what prompted my own interest in it. However, after taking a look in person from here on the shore, and then consulting old maps, I realised that it is simply the remains of the "south jetty" that is shown on the first-edition map (surveyed in 1860). Through WoSAS, I passed the relevant corrections on, so that they could be incorporated in the Canmore database, etc.

For a later picture, taken on a better day, see NS4672 : Remains of the south jetty.

As the name suggests, the south jetty was one of a pair; both jetties originally had beacons at the end (the large rounded area that is visible at the end of the south jetty supported the beacon). The corresponding north jetty is located not far away, on the other side of the Erskine Bridge (which appears in the left-hand side of the photo), and is better preserved; it is now the site of St Patrick's Light.

Incidentally, Link (at Canmore) provides a useful aerial photograph of the area around the remains of the south jetty. In that photo, the remains can be seen just to the left of the far end of the Erskine Bridge. Also visible, on both sides of the Clyde, are the former slipways of the Erskine Ferry, on which, see Link

There is, about 900 metres downriver, a genuine crannog at Erskine: NS4572 : Erskine Crannog.