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Hönne
The Hönne is a left tributary river to the Ruhr, flowing through the northern Sauerland hills in North Rhine-Westphalia, Germany. The spring of the Hönne is located in the west of Neuenrade at 437m above sea level. After 33 km the river ends near the town of Fröndenberg. The total catchment area of the river is 262 km². Most notable is the narrow valley between Balve and Menden, where the Hönne has carved 60m deep into Devonian limestone. Several caves are located in the valley, of which the Balver Höhle and the ''Reckenhöhle'' are accessible for visitors. When the water level in the river is low, some parts of the valley fall dry as the water flows subterraneously through the Karst rocks. Several of the tributary brooks in that valley also flow subterraneously for some parts of their course. Caves Many caves were formed throughout the Hönne. The biggest culture cave in Europe is located in Balve. A cave with flowstone Flowstones are sheetlike depo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balve
Balve is a town in the Märkischer Kreis district, North Rhine-Westphalia, Germany. It is located in ''Hönnetal'', a narrow valley created by the river Hönne, which is near the Sorpe Dam, formerly part of Balve, and at the north end of the Sauerland, near Dortmund. The town was established in 1975 with several divisions including Balve, Beckum and Eisborn and Garbeck. History The first reference to Balve is from around 780, when it was mentioned that a Widukind owned a farm called ''Ballowa'', another name for the town, although this reference has been disputed. The first undisputed reference was in 864, in which a blind girl from Balve was said to be healed at the grave of the Saint Ludger in the crypt of Werden Abbey. Ballowa is also mentioned in the Thidrekssaga, a chivalric saga written in the mid-13th century in Norway. In the saga, Ballowa is the home of two dwarfs who taught Weyland much about making iron weapons. At the time of writing, Balve belonged to the cou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Menden (Sauerland)
Menden (, official name: ''Menden (Sauerland)''; Westphalian: ''Mennen'') is a city in the district Märkischer Kreis, in North Rhine-Westphalia, Germany. It is located at the north end of the Sauerland near the Ruhr river. History Menden's first churches were built in the 9th century. From 1180 on the area around Menden was part of the Cologne region, however, as it was on the border with the County of Mark, it was often fought over. In 1276, it received city rights. Industrialization started early: in 1695 needle production was the first industry, later followed by limestone products such as cement. In 1816 Menden was included within Prussia, after being part of Hesse for 13 years. In 1975 the city was merged with several previously independent municipalities, thus it grew in area as well as population. Points of interest The ''Hönnetal'', a narrow valley with some beautiful cliffs carved into the limestone bedrock by the river Hönne. Education Primary education In M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruhr (river)
__NOTOC__ The Ruhr is a river in western Germany (North Rhine-Westphalia), a right tributary (east-side) of the Rhine. Description and history The source of the Ruhr is near the town of Winterberg in the mountainous Sauerland region, at an elevation of approximately . It flows into the lower Rhine at an elevation of only in the municipal area of Duisburg. Its total length is , its average discharge is at Mülheim near its mouth. Thus, its discharge is, for example, comparable to that of the river Ems in Northern Germany or the River Thames in the United Kingdom. The Ruhr first passes the towns of Meschede, Arnsberg, Wickede, Fröndenberg, Holzwickede, Iserlohn, and Schwerte. Then the river marks the southern limit of the Ruhr area, passing Hagen, Dortmund, Herdecke, Wetter, Witten, Bochum, Hattingen, Essen, Mülheim, and Duisburg. The Ruhr area was Germany's primary industrial area during the early- to mid-20th century. Most factories were located there. The oc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fröndenberg
Fröndenberg (; Westphalian: ''Frönnenbiärg'') is a town in the district of Unna, in North Rhine-Westphalia, Germany. Geography Fröndenberg is situated in the Ruhr valley, approx. 10 km south-east of the district capital Unna, near the Hönne. Neighbouring places * Unna * Wickede * Menden * Schwerte * Holzwickede History The city as such is relatively new, it grew out of the reorganization in 1902 whereby the former independent villages Stift, Westick and village Froendenberg melted into the bigger village community of Fröndenberg. It obtained city status in 1952. The oldest record of the name ` Frundeberg` is the papal document by Coelestin III from 1197. The present day administrative infrastructure goes back to 1968 when the villages Altendorf, Ardey, Bausenhagen, Dellwig, Frohnhausen, Frömern, Langschede, Neimen, Ostbüren, Stentrop, Strickherdicke, the town of Warmen and the town of Fröndenberg were merged into one administrative unit. In 1969 the village B ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Balver Höhle
The Balver Höhle (German for Balve Cave) is the biggest cave used as a cultural venue in Europe. It is located in Balve, Germany. History The Balve Cave was mentioned in the Thidrekssaga. It has been used by the local '' Schützenfest'' (marksmen's festival) each year for over 160 years. Since 1985 it has also been the venue of an annual theatre festival, the ''Festspiele Balver Höhle''. Its first play was the ''Katharina von Georgien'' directed by Hermann Wedekind.In 1991 it staged dramas based on fairy tales festival was installed by ''Festspiele Balver Höhle''. In 1998 the ''Festspiele Balver Höhle'' performed their first oriental musical. In 2009 they did their second, "Der kleine Muck". Semi-professionals and professionals are working together at ''Irish Folk & Celtic Music'', ''Balver Märchenwochen'' and other activities of ''Festspiele Balver Höhle''. Festivals * Balver Märchenwochen, since 1991 * Irish Folk & Celtic Music, since 2002 *Höhlenrock, terminat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cannibalism
Cannibalism is the act of consuming another individual of the same species as food. Cannibalism is a common ecological interaction in the animal kingdom and has been recorded in more than 1,500 species. Human cannibalism is well documented, both in ancient and in recent times. The rate of cannibalism increases in nutritionally poor environments as individuals turn to members of their own species as an additional food source.Elgar, M.A. & Crespi, B.J. (1992) ''Cannibalism: ecology and evolution among diverse taxa'', Oxford University Press, Oxford ngland New York. Cannibalism regulates population numbers, whereby resources such as food, shelter and territory become more readily available with the decrease of potential competition. Although it may benefit the individual, it has been shown that the presence of cannibalism decreases the expected survival rate of the whole population and increases the risk of consuming a relative. Other negative effects may include the increased r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Flowstone
Flowstones are sheetlike deposits of calcite or other carbonate minerals, formed where water flows down the walls or along the floors of a cave. They are typically found in "solution caves", in limestone, where they are the most common speleothem. However, they may form in any type of cave where water enters that has picked up dissolved minerals. Flowstones are formed via the degassing of vadose percolation waters. Flowstone may also form on manmade structures as a result of calcium hydroxide being leached from concrete, lime or mortar. These secondary deposits created outside the cave environment, which mimic the shapes and forms of speleothems, are classified as "calthemites" and are associated with concrete degradation.Smith, G.K., (2016). “Calcite Straw Stalactites Growing From Concrete Structures”, Cave and Karst Science, Vol.43, No.1, P.4-10, (April 2016), British Cave Research Association, ISSN 1356-191X. Formation Flowing films of water that move along floors or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Europe
Europe is a large peninsula conventionally considered a continent in its own right because of its great physical size and the weight of its history and traditions. Europe is also considered a subcontinent of Eurasia and it is located entirely in the Northern Hemisphere and mostly in the Eastern Hemisphere. Comprising the westernmost peninsulas of Eurasia, it shares the continental landmass of Afro-Eurasia with both Africa and Asia. It is bordered by the Arctic Ocean to the north, the Atlantic Ocean to the west, the Mediterranean Sea to the south and Asia to the east. Europe is commonly considered to be separated from Asia by the watershed of the Ural Mountains, the Ural River, the Caspian Sea, the Greater Caucasus, the Black Sea and the waterways of the Turkish Straits. "Europe" (pp. 68–69); "Asia" (pp. 90–91): "A commonly accepted division between Asia and Europe ... is formed by the Ural Mountains, Ural River, Caspian Sea, Caucasus Mountains, and the Black Sea wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Caves
A cave or cavern is a natural void in the ground, specifically a space large enough for a human to enter. Caves often form by the weathering of rock and often extend deep underground. The word ''cave'' can refer to smaller openings such as sea caves, rock shelters, and grottos, that extend a relatively short distance into the rock and they are called ''exogene'' caves. Caves which extend further underground than the opening is wide are called ''endogene'' caves. Speleology is the science of exploration and study of all aspects of caves and the cave environment. Visiting or exploring caves for recreation may be called ''caving'', ''potholing'', or ''spelunking''. Formation types The formation and development of caves is known as ''speleogenesis''; it can occur over the course of millions of years. Caves can range widely in size, and are formed by various geological processes. These may involve a combination of chemical processes, erosion by water, tectonic forces, microorga ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Karst
Karst is a topography formed from the dissolution of soluble rocks such as limestone, Dolomite (rock), dolomite, and gypsum. It is characterized by underground drainage systems with sinkholes and caves. It has also been documented for more weathering-resistant rocks, such as quartzite, given the right conditions. Subterranean drainage may limit surface water, with few to no rivers or lakes. However, in regions where the dissolved bedrock is covered (perhaps by debris) or confined by one or more superimposed non-soluble rock strata, distinctive karst features may occur only at subsurface levels and can be totally missing above ground. The study of ''paleokarst'' (buried karst in the stratigraphic column) is important in petroleum geology because as much as 50% of the world's hydrocarbon reserves are hosted in carbonate rock, and much of this is found in porous karst systems. Etymology The English word ''karst'' was borrowed from German language, German in the late 19th century, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Devonian Period
The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, where rocks from this period were first studied. The first significant adaptive radiation of life on dry land occurred during the Devonian. Free-sporing vascular plants began to spread across dry land, forming extensive forests which covered the continents. By the middle of the Devonian, several groups of plants had evolved leaves and true roots, and by the end of the period the first seed-bearing plants appeared. The arthropod groups of myriapods, arachnids and hexapods also became well-established early in this period, after starting their expansion to land at least from the Ordovician period. Fish reached substantial diversity during this time, leading the Devonian to often be dubbed the Age of Fishes. The placoderms began dominat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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