Puntukas
From Wikipedia, the free encyclopedia
Puntukas is the second-largest boulder in Lithuania, a natural monument of the state. It is situated some 5 kilometres (3.1 mi) south of Anykščiai on the left bank of the Šventoji River. Next to Puntukas, the treetop trail of Anykščiai Pine Forest is arranged. It was believed to be the largest stone in Lithuania until the discovery of Barstyčiai stone in the Skuodas district in 1957.
Puntukas is a glacial erratic—it was brought by glaciers during the last glacial period (18th–12th millennium BC) probably from Finland.[1] It measures 6.9 metres (23 ft) in length, 6.7 m (22 ft) in width, and 5.7 m (19 ft) in depth (including 1.5 m (4 ft 11 in) underground). It weighs about 446 tons according to the latest data.[2][3] It is made of Rapakivi granite. Its reddish mass includes large crystals of potassium feldspar surrounded by green rings of oligoclase.[1]
