Sediments in Gironde Estuary on West Coast of France – October 17th, 201144.8N 0.5W
Sediments give the Gironde, on the western coast of France, an opaque tan color. Then they give a greenish tinge to the coastline as the diffuse into the waters of the Bay of Biscay. The Gironde is subject to very strong tidal currents and great care is needed when navigating by any size or type of boat.
The Gironde is a navigable estuary (often falsely referred to as a river), in southwest France and is formed from the meeting of the rivers Dordogne and Garonne just below the centre of Bordeaux. Covering around 635 km2 (245 sq mi), approximately 65 km (40 mi) long and 3–11 km (2–7 miles) wide, it is the largest estuary in western Europe.