The coast of Finland is a mosaic of headlands, islands, bays and straits. There are about 73,000 islands, of which 52,000 are less than 1 ha in area and only 15 exceed 50 km2. Measured on the 1:10,000 map the coastline is 47,518 km long (Granö 2007), varying in width from about 120 km in the southwest (the Åland archipelago) to less than 5 km along the Gulf of Bothnia. About 41.9% of the shoreline is rocky, 41.6% is composed of glacial drift, 10.4% silt, clay and marshes, 4.8% sand and gravel, and 1.3% artificial (Granö et al. 1999).
The islands are of three kinds: rocky, especially in the south and southwest, where they are often encircled by glacial drift partly covered with silt and clay; morainic on the coast of the Gulf of Bothnia and eskers, with sand and gravel partly covered by silt and clay. These are often in sequence, the outer islands being rocky or boulder moraine and those further landward having a mantle of glacial drift, overlain in the innermost zone by a...
KeywordsClay Depression Sedimentation Beach Silt
- Alestalo J, Häikiö J (1976) Ice features and ice-thrust shore forms at Luodonselkä, Gulf of Bothnia, in winter 1972/73. Fennia 144:5–24Google Scholar
- GranöO (2007) Coastal studies in Finland. Yearbook of the Estonian Geographical Society 36:156–175Google Scholar
- Granö O, Roto M (1989) Zonality in the Finnish coastal environment. Essener Geographischen Arbeiten 18:269–281Google Scholar
- Granö O, Roto M, Laurila L (1999) Environment and land use in the shore zone of the coast of Finland. Publicationes Instituti Geographici Universitatis Turkuensis 160:76Google Scholar
- Hellemaa P (1998) The development of coastal dunes and their vegetation in Finland. Fennia 176:1–245Google Scholar
- Jones M (1977) Finland. Daughter of the sea. Dawson, Folkestone, KentGoogle Scholar