Today's geology lesson: Eskers

Eskers are deposits of sand and gravel laid down by streams running beneath glaciers. After the ice melts away, the eskers are left as long winding ridges. These ones are in Strath Nairn, south of Inverness, a Site of Special Scientific Interest which includes a nice walk along and between the eskers. There are information posta along the walk, pointing out the features and giving information about glaciation and how it shaped the landscape.