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Ice Disk
Ice discs, ice circles, ice pans, ice pancakes or ice crepes are a very rare natural phenomenon that occurs in slow moving water in cold climates. They are thin circular slabs of ice that rotate slowly on a body of water's surface. Types Ice discs Ice discs form on the outer bends in a river where the accelerating water creates a force called 'rotational shear', which breaks off a chunk of ice and twists it around. As the disc rotates, it grinds against surrounding ice — smoothing into a circle. A relatively uncommon phenomenon, one of the earliest recordings is of a slowly revolving disc spotted on the Mianus River and reported in an 1895 edition of ''Scientific American''. Ice pans River specialist and geography professor Joe Desloges states that ice pans are "surface slabs of ice that form in the center of a lake or creek, instead of along the water’s edge". As water cools, ice crystals form into 'frazil ice' and can cluster together into a pan-shaped formation. If ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vana-vigala Spinning Ice Disk
Vana-Vigala is a village in Märjamaa Parish, Rapla County in western Estonia. Since 2002, the Heavy metal music, metal festival Hard Rock Laager has been held in Vana-Vigala every summer. The Vigala (river), Vigala River flows through Vana-Vigala. The natural phenomenon known as the Ice Circle of Vana-Vigala appears on the river. Vana-Vigala Manor Vana-Vigala Manor () dates from 1420, when the first fortified manor house was built near the present building. The current building was built from 1772 to 1775. It stands on soft ground and has had to be strengthened on several occasions. In 1858 and 1864, restoration was carried out and the façade was changed. During the Russian Revolution of 1905, rioters set fire to the house, with heavy damage ensuing, including the loss of the 20,000-volume library. The house was later restored, and by 1914 it had regained most of its earlier look. In the 18th century, a romantic park and a deer park were laid out around the manor. During almo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
