Bølling Sø
| Bølling sø | ||
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| Bølling sø | ||
| Geographical location | Midtjylland , Denmark | |
| Location close to the shore | Silkeborg | |
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| Coordinates | 56 ° 10 ′ 50 " N , 9 ° 22 ′ 20" E | |
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| surface | 835 ha | |
The Bølling lake is one of Denmark's highest lakes. It is located on the watershed called the “Jute Ridge” in the middle of Jutland , 10 kilometers west of Silkeborg and northeast of Engesvang . The lake is an 835 hectare large dead ice hole , which gets its water from direct or indirect precipitation. The border between Ikast-Brande Municipality and Silkeborg Municipality runs through the lake .
Emergence
The dead ice hole was formed about thirteen or twelve thousand years ago - at the end of the last ice age . This is the type locality for the " Bølling period " identified by Johannes Iversen (1904–1971) . The analyzes provided evidence of a warming period prior to the Allerød Interstadial . For these it serves as a parastratotype, since its original types profile has been lost. The older Dryas in between was also typified here by Iversen.
The early pioneer vegetation is characterized by Salix polaris , Dryas octopetala and other herbs. The Younger Dryas was probably colder than the Older Dryas . During the Stone Age , the lake was home to the early hunter cultures ( Hamburger , Bromme and Ahrensburg culture ).
During the 19th century the lake dried up, but gave only poor quality arable land. Until the end of the 20th century there was only one Bølling Sø Canal, but at the beginning of the 21st century it was renatured and is now a large lake again.
Important bird species in the lake reserve
Whinchat ( Saxicola rubetra ) • Falcon • warbler ( Locustrella naevia ) • Gray Goose ( Anser anser ) • goshawk ( Accipiter gentilis ) • Northern Harrier ( Circus cyaneus ) • Kurzohreule and Langohreule • Gray Shrike ( Lanius excubitor ) • Raven ( Corvus corax ) • rough-legged buzzard • Reed Bunting ( Emberiza schoeniclus ) • Marsh Harrier ( Circus aeruginosus ) • snipe • Whooper swan ( Cygnus cygnus ) • Sperber ( Accipiter nisus ) • tawny owl ( Strix aluco )