Ancylus lake is a name given by geologists to the body of fresh water that replaced the Yoldia sea after the latter had been severed from its saline intake across central Sweden by the isostatic rise of south Scandinavian landforms. The dates are approximately 9500-8000 BP calibrated, during the full Boreal period. The lake became Littorina Sea when rising oceanic levels broke through the Great Belt. For other uses, see Scandinavia (disambiguation). ... The Boreal in paleoclimatology was the first Blytt-Sernander period, pollen zone and chronozone of Holocene north Europe. ... The Wisconsin (in North America), Weichsel (in Scandinavia), Devensian (in the British Isles), Midlandian (in Ireland) or Würm glaciation (in the Alps) is the most recent period of the Ice Age, and ended some 10,000 BC. The Wisconsin/Weichsel/Devensian/Midlandian/Würm glaciation began about 70,000... The straits of Denmark. ...

The lake was named by Gerard de Geer after Ancylus fluviatilis, a gastropod found in its sediments. Baron Gerard Jacob De Geer (1858-1943) was a Swedish geologist who made significant contributions to Quaternary geology, particularly geomorphology and geochronology. ... Subclass Subclass Eogastropoda     Patellogastropoda Subclass Orthogastropoda   Superorder Cocculiniformia   Superorder Hot Vent Taxa     Neomphaolida   Superorder Vetigastropoda   Superorder Neritaemorphi     Neritopsina   Superorder Caenogastropoda     Architaenioglossa     Sorbeoconcha   Superorder Heterobranchia     Heterostropha     Opisthobranchia     Pulmonata The gastropods, or univalves, are the largest and most successful class of mollusks, with 60,000-75,000 species, and second largest class... Sediment is any particulate matter that can be transported by fluid flow and which eventually is deposited as a layer of solid particles on the bed or bottom of a body of water or other liquid. ...

Description

The elevation of southern Sweden did not entirely block the flow across central Sweden. Some egress continued from the lake through the Göta and Steinselva rivers, which exit Lake Vänern to the Kattegat. Salt water did not enter the lake, however, which became entirely fresh as the lake rose above sea level. The date at which the flow was certainly blocked is about 8000 BP, when nearby Lake Vättern (part of the waterway system) became dissevered from Ancylus lake. Waterfalls in Trollhättan/Göta älv Göta älv is a river that drains lake Vänern into Kattegat, and the North Sea, at the city of Gothenburg on the western coast of Sweden. ... Lake Vänern Vänern is the largest lake in Sweden, and the third largest lake in Europe, covering an area of 5,655 km². Its main tributary is Klarälven, which flows into the lake near the city of Karlstadt. ... The Baltic Sea The Kattegat (Danish), or Kattegatt (Swedish), is a bay of the North Sea and a continuation of the Skagerrak, bounded by Denmark and Sweden. ... On the country map, the slit-shaped lake Vättern is easily identified in the south Lake Vättern Vättern is the second largest lake (by surface area) in Sweden, after lake Vänern. ...

The result of increasing lake levels was the Ancylus transgression, a general flooding around its shores, 9500-9200 BP. By this time a somewhat larger Gulf of Bothnia and parts of Norway were free of ice, while the Rovaniemi region of Finland appeared no later than 9000 BP, despite the new flooding. The Baltic Sea The Gulf of Bothnia (Fin. ... City scenery of Rovaniemi in January 2004 Rovaniemi (Roavenjárga in Northern Sami) is the administrative capital and the centre of commerce of Finlands northernmost Province, Lapland. ...

Accelerated melting and landforms rebounding at different rates in different locations led to some instability. By 9200 BC the lake rose over the Dars sill and cut a new channel in the vicinity of what is now the Great Belt, which some geologists call the Dana river. For a time, Skäne, or southern Sweden, was an island once more, from about 9200 to no later than 8000 BP. The lake level began to drop. The straits of Denmark. ...

North Scandinavia

By 9000 BP the northern channel ceased functioning, joining Skåne to Scandinavia rather than to Denmark. However, only an isthmus connected Sknåe to the new northern lands. If Skåne acquired its designation as an island on a geographic basis, it must have been no later than the Ancylus lake phase. At that time Mesolithic cultures moved into newly released land around the shores of the Gulf of Bothnia. They were fishing along the shores, hunting seals and following the reindeer into their new ranges. â–¶ (help· info) (also known as Scania) is the southernmost historical province (landskap) of Sweden. ... The Mesolithic (Greek mesos=middle and lithos=stone or the Middle Stone Age) is the period between the Paleolithic and Neolithic periods. ... The Baltic Sea The Gulf of Bothnia (Fin. ...

In Lapland Mesolithic fishers, hunters and probably herders found pine-birch forest with tundra-like open spaces. In addition to pinus and betula were aspen, alder, willow, crowberries, grass and sedge. Much of the new Finnish land was covered by mire. Moraine ridges and drumlins formed an extensive island system. The shores around the lake were stony ground. National anthem Sámi soga lávlla Languages Sami, Norwegian, Swedish, Finnish, Russian Area ca. ... This article deals with the tree; for the e-mail client see Pine email client Species About 115. ... Species many species see text and classification Birch is the name of any tree of the genus Betula, in the family Betulaceae, closely related to the beech/oak family, Fagaceae. ... Species Populus adenopoda Populus alba Populus grandidentata Populus sieboldii Populus tremula Populus tremuloides Aspens are trees of the willow family and comprise a section of the poplar genus, Populus sect. ... Species About 20-30 species, see text. ... Species About 350, including: Salix acutifolia- Violet Willow Salix alaxensis- Alaska Willow Salix alba- White Willow Salix alpina- Alpine Willow Salix amygdaloides- Peachleaf Willow Salix arbuscula- Mountain Willow Salix arbusculoides- Littletree Willow Salix arctica- Arctic Willow Salix atrocinerea Salix aurita- Eared Willow Salix babylonica- Peking Willow Salix barrattiana- Barratts... Species Empetrum nigrum Empetrum eamesii The crowberries (Empetrum L.) are a small genus of dwarf evergreen shrubs that bear edible fruits. ... For other uses, see Grass (disambiguation). ... Genera See text The family Cyperaceae, or the Sedge family, is a taxon of monocot flowering plants that superficially resemble grasses or rushes. ... Moraine is the general term for debris of all sorts originally transported by glaciers or ice sheets that have since melted away. ... Drumlin in Cato, New York A drumlin (Gaelic druim the crest of a hill) is an elongated whale-shaped hill formed by glacial action. ...