Latvia lies on the eastern shores of the Baltic Sea on the level northwestern part of the rising East European platform, between Estonia and Lithuania. About 98% of the country lies under 200 m (656 ft) elevation. With the exception of the coastal plains, the ice age divided Latvia into three main regions: the morainic Western and Eastern uplands and the Middle lowlands. Latvia holds over 12,000 rivers, only 17 of which are longer than 100 km (60 mi), and over 3,000 small lakes, most of which are eutrophic. The major rivers include the Daugava, the Lielupe, the Gauja, the Venta and the Salaca. Woodlands cover around 52% of the country (Pine – 34%, Spruce – 18%, Birch – 30%). Other than peat, dolomite, and limestone, natural resources are scarce. Latvia has 504 km (313 mi) of sandy coastlin