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Halleberg
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden. Halleberg, part of which protrudes into Lake Vänern is separated in the south by about wide valley from the adjacent Hunneberg (also a table mountain). The northern part of Halleberg called ''Hallesnipen''. Geology Hallberg has an average height of about above lake Vänern, or above sea level; the highest point is above sea level. Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average thick. Above this there is then a thick slate which in turn covered by about of alum shale. The Ordovician is represented by a calcareous slate. During the Permian it was pushed into diabase which lays as a protective cover and thus protect the mountain fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halleberg
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden. Halleberg, part of which protrudes into Lake Vänern is separated in the south by about wide valley from the adjacent Hunneberg (also a table mountain). The northern part of Halleberg called ''Hallesnipen''. Geology Hallberg has an average height of about above lake Vänern, or above sea level; the highest point is above sea level. Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average thick. Above this there is then a thick slate which in turn covered by about of alum shale. The Ordovician is represented by a calcareous slate. During the Permian it was pushed into diabase which lays as a protective cover and thus protect the mountain fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halleberg 02
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden. Halleberg, part of which protrudes into Lake Vänern is separated in the south by about wide valley from the adjacent Hunneberg (also a table mountain). The northern part of Halleberg called ''Hallesnipen''. Geology Hallberg has an average height of about above lake Vänern, or above sea level; the highest point is above sea level. Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average thick. Above this there is then a thick slate which in turn covered by about of alum shale. The Ordovician is represented by a calcareous slate. During the Permian it was pushed into diabase which lays as a protective cover and thus protect the mountain fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Halleberg 01
Halleberg is a table mountain by lake Vänern in Vänersborg Municipality, Västergötland, Sweden. Halleberg, part of which protrudes into Lake Vänern is separated in the south by about wide valley from the adjacent Hunneberg (also a table mountain). The northern part of Halleberg called ''Hallesnipen''. Geology Hallberg has an average height of about above lake Vänern, or above sea level; the highest point is above sea level. Halleberg consists of Cambrian, Ordovician and Permian rocks. The Palaeozoic rocks are deposited directly on the crystalline peneplain bedrock, which in this range consists of göta granite. The Cambrian sedimentary rocks are sandstone and alum shale. The sandstone layer is on average thick. Above this there is then a thick slate which in turn covered by about of alum shale. The Ordovician is represented by a calcareous slate. During the Permian it was pushed into diabase which lays as a protective cover and thus protect the mountain fro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vänern
Vänern ( , also , ) is the largest lake in Sweden, the largest lake in the European Union and the third-largest lake of all Europe after Ladoga and Onega in Russia. It is located in the provinces of Västergötland, Dalsland, and Värmland in the southwest of the country. With its surface located at with a maximum depth of , the lowest point of the Vänern basin is at below sea level. The average depth is at a more modest , which means that the average point of the lake floor remains above sea level. Vänern drains into Göta älv towards Gothenburg and the Kattegat tributary of the Atlantic Ocean. It is the only one of the ten largest lakes in Sweden not to drain on the country's eastern coastline. Due to the construction of Göta Canal in the 19th century, there is an upstream water path to Vättern and the east coast from Vänern. The main inflow of water comes from Klarälven entering Vänern near Karlstad with its source in Trøndelag in Norway. History The southeas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Västergötland
Västergötland (), also known as West Gothland or the Latinized version Westrogothia in older literature, is one of the 25 traditional non-administrative provinces of Sweden (''landskap'' in Swedish), situated in the southwest of Sweden. Västergötland is home to Gothenburg, the second largest city in Sweden, which is situated along a short stretch of the Kattegat strait. The province is bordered by Bohuslän, Dalsland, Värmland, Närke, Östergötland, Småland and Halland, as well as the two largest Swedish lakes Vänern and Vättern. Victoria, Crown Princess of Sweden is Duchess of Västergötland. Administration The provinces of Sweden serve no administrative function. Instead, that function is served by counties of Sweden. From the 17th century up until 31 December 1997, Västergötland was divided into Skaraborg County, Älvsborg County and a minor part of Gothenburg and Bohus County. From 1 January 1998 nearly all of the province is in the newly created Västra ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Migration Period
The Migration Period was a period in European history marked by large-scale migrations that saw the fall of the Western Roman Empire and subsequent settlement of its former territories by various tribes, and the establishment of the post-Roman kingdoms. The term refers to the important role played by the migration, invasion, and settlement of various tribes, notably the Franks, Goths, Alemanni, Alans, Huns, early Slavs, Pannonian Avars, Magyars, and Bulgars within or into the former Western Empire and Eastern Europe. The period is traditionally taken to have begun in AD 375 (possibly as early as 300) and ended in 568. Various factors contributed to this phenomenon of migration and invasion, and their role and significance are still widely discussed. Historians differ as to the dates for the beginning and ending of the Migration Period. The beginning of the period is widely regarded as the invasion of Europe by the Huns from Asia in about 375 and the ending with the conq ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hillfort
A hillfort is a type of earthwork used as a fortified refuge or defended settlement, located to exploit a rise in elevation for defensive advantage. They are typically European and of the Bronze Age or Iron Age. Some were used in the post-Roman period. The fortification usually follows the contours of a hill and consists of one or more lines of earthworks, with stockades or defensive walls, and external ditches. Hillforts developed in the Late Bronze and Early Iron Age, roughly the start of the first millennium BC, and were used in many Celtic areas of central and western Europe until the Roman conquest. Nomenclature The spellings "hill fort", "hill-fort" and "hillfort" are all used in the archaeological literature. The ''Monument Type Thesaurus'' published by the Forum on Information Standards in Heritage lists ''hillfort'' as the preferred term. They all refer to an elevated site with one or more ramparts made of earth, stone and/or wood, with an external ditch. Many ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diabase
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
