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Summasjärvi
Lake Summanen (Finnish: ''Summasjärvi, Summanen'') is a medium-sized lake of Finland. It is located in Saarijärvi, in the region of Keski-Suomi. There is a Stone Age Museum in the island of Summassaari. The Summanen crater The 12th impact crater identified in Finland is located at the center of the lake. The crater is 2.6 kilometers wide, ~200 meters deep, and mostly buried under later sediments. The age of the crater is not known. It formed before the Quaternary glaciation, but on the other hand after the host rock which formed in the Svecofennian orogeny 1910 million years ago. (Plado et al. assume the impact was Phanerozoic, but give no evidence to support this.) The otherwise shallow lake (depth <10 m) has a 41 m central or trench at the crater site. The location is also occupied by a significant, circular [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Lakes In Finland
There are 187,888 lakes in Finland larger than 5 Hectare#Are, ares (500 square metres / 5,382 sq.ft.) Most are small, but there are 309 lakes or reservoirs larger than 10 km². They are listed here along with some smaller noteworthy lakes. Alphabetical listing A Aapajärvi, Ala-Kintaus, Ala-Kitka B Lake Bodom, Bodominjärvi E Elämäjärvi, Enäjärvi, Enijärvi, Enonvesi, Lake Evijärvi, Evijärvi H Lake Haapajärvi, Haapajärvi, Hankavesi, Hankavesi – Lonkari, Hankavesi – Välivesi, Hauhonselkä, Haukivesi, Hiidenvesi, Hiirenvesi, Hirvijärvi Reservoir, Hirvijärvi – Kalliovesi, Höytiäinen, Hyrynjärvi I Lake Iijärvi (Inari), Iijärvi (1), Lake Iijärvi (Ristijärvi), Iijärvi (2), Iijärvi (Kuusamo), Iijärvi (3), Lake Iijärvi (Suomussalmi), Iijärvi (4), Iisvesi, Iivantiira – Juttuajärvi, Ilmoilanselkä, Immalanjärvi, Lake Inari, Inari, Irnijärvi, Irnijärvi – Ala-Irni, Tipasjärvi, Iso and Pieni Tipasjärvi, Iso Lamujärvi, Iso Lohijärvi, Lake Ke ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kymijoki
The Kymi ( fi, Kymijoki, sv, Kymmene älv) is a river in Finland. It begins at Lake Päijänne, flows through the provinces of Päijänne Tavastia, Uusimaa and Kymenlaakso and discharges into the Gulf of Finland. The river passes the towns of Heinola and Kouvola. The town of Kotka is located on the river delta. The length of the river is , but its drainage basin of extends to almost inside the Tavastia, Central Finland, Savonia and Ostrobothnia. The furthest source of the river is Lake Pielavesi, its furthest point being some from the sea measured by flow route. The name of the river, itself, ''kymi'', means "large river", in Old Finnish. Being one of the largest rivers in Southern Finland, the Kymi is a major source of hydroelectricity. The towns of Kotka, Kuusankoski, Myllykoski and Inkeroinen along the river are major centres of the pulp and paper industry. Formerly the river was extensively used for timber rafting. The Kymijoki river has five mouths. It divides into t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Finland
Finland ( fi, Suomi ; sv, Finland ), officially the Republic of Finland (; ), is a Nordic country in Northern Europe. It shares land borders with Sweden to the northwest, Norway to the north, and Russia to the east, with the Gulf of Bothnia to the west and the Gulf of Finland across Estonia to the south. Finland covers an area of with a population of 5.6 million. Helsinki is the capital and largest city, forming a larger metropolitan area with the neighbouring cities of Espoo, Kauniainen, and Vantaa. The vast majority of the population are ethnic Finns. Finnish, alongside Swedish, are the official languages. Swedish is the native language of 5.2% of the population. Finland's climate varies from humid continental in the south to the boreal in the north. The land cover is primarily a boreal forest biome, with more than 180,000 recorded lakes. Finland was first inhabited around 9000 BC after the Last Glacial Period. The Stone Age introduced several differ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saarijärvi
Saarijärvi () is a town and municipality of Finland. It is located in the Central Finland region. The municipality has a population of () and covers an area of of which is water. The population density is . Neighbouring municipalities are Kannonkoski, Karstula, Multia, Soini, Uurainen, Ähtäri and Äänekoski. The municipality is unilingually Finnish. The neighboring municipality of Pylkönmäki was consolidated to Saarijärvi on 1 January 2009. There are all together 241 lakes in Saarijärvi. Biggest lakes are Pyhäjärvi, Summanen and Lake Saarijärvi. Saarijärvi is the home of ''Bonden Paavo'' ( fi, Saarijärven Paavo) in the poem by Johan Ludvig Runeberg. Juho Hyytiäinen, the great grandfather of Pamela Anderson, left the village in 1908 emigrating to the American continent. History Saarijärvi has existed since the mid-16th century, when it was a part of the Rautalampi parish. Saarijärvi acquired its first church in 1628, which was also when the Laukaa pari ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Keski-Suomi
Central Finland ( fi, Keski-Suomi; sv, Mellersta Finland) is a region ( / ) in Finland. It borders the regions of Päijät-Häme, Pirkanmaa, South Ostrobothnia, Central Ostrobothnia, North Ostrobothnia, North Savo, and South Savo. The city of Jyväskylä is the regional centre and by far the largest city in the area. The largest lake in the very water-based region is Lake Päijänne (1,080 km2). Other large lakes are Lake Keitele (490 km2), Lake Konnevesi (190 km2) and Lake Kivijärvi (150 km2). The highest point in the region is Kiiskilänmäki in the municipality of Multia, which reaches an altitude of 269 meters above sea level. Kuokanjoki, Finland's shortest river and one of the world's shortest rivers is in the region. Central Finland has been one of the slowly growing regions in terms of population, but the growth has been based on the Jyväskylä sub-region's position as a significant growth center, and most of the region's municipalities are declining in population. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Impact Crater
An impact crater is a circular depression in the surface of a solid astronomical object formed by the hypervelocity impact of a smaller object. In contrast to volcanic craters, which result from explosion or internal collapse, impact craters typically have raised rims and floors that are lower in elevation than the surrounding terrain. Lunar impact craters range from microscopic craters on lunar rocks returned by the Apollo Program and small, simple, bowl-shaped depressions in the lunar regolith to large, complex, multi-ringed impact basins. Meteor Crater is a well-known example of a small impact crater on Earth. Impact craters are the dominant geographic features on many solid Solar System objects including the Moon, Mercury, Callisto, Ganymede and most small moons and asteroids. On other planets and moons that experience more active surface geological processes, such as Earth, Venus, Europa, Io and Titan, visible impact craters are less common because they become eroded ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Quaternary Glaciation
The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing. Although geologists describe this entire period up to the present as an "ice age", in popular culture this term usually refers to the most recent glacial period, or to the Pleistocene epoch in general. Since Earth still has polar ice sheets, geologists consider the Quaternary glaciation to be ongoing, though currently in an interglacial period. During the Quaternary glaciation, ice sheets appeared, expanding during glacial periods and contracting during interglacial periods. Since the end of the last glacial period, only the Antarctic and Greenland ice sheets have survived, with other sheets formed during glacial periods, such as the Laurentide Ice Sheet, having completely melted. The major effects of the Quaternary glaciation have been the continental erosion o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Svecofennian Orogeny
The Svecofennian orogeny is a series of related orogenies that resulted in the formation of much of the continental crust in what is today Sweden and Finland plus some minor parts of Russia. The orogenies lasted from about 2000 to 1800 million years ago during the Paleoproterozoic Era. The resulting orogen is known as the Svecofennian orogen or Svecofennides. To the west and southwest the Svecofennian orogen limits with the generally younger Transscandinavian Igneous Belt. It is assumed that the westernmost fringes of the Svecofennian orogen have been reworked by the Sveconorwegian orogeny just as the western parts of the Transscandinavian Igneous Belt has. The Svecofennian orogeny involved the accretion of numerous island arcs in such manner that the pre-existing craton grew with this new material from what is today northeast to the southwest. The accretion of the island arcs was also related to two other processes that occurred in the same period; the formation of magma tha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phanerozoic
The Phanerozoic Eon is the current geologic eon in the geologic time scale, and the one during which abundant animal and plant life has existed. It covers 538.8 million years to the present, and it began with the Cambrian Period, when animals first developed hard shells preserved in the fossil record. The time before the Phanerozoic, called the '' Precambrian'', is now divided into the Hadean, Archaean and Proterozoic eons. The time span of the Phanerozoic starts with the sudden appearance of fossilised evidence of a number of animal phyla; the evolution of those phyla into diverse forms; the emergence and development of complex plants; the evolution of fish; the emergence of insects and tetrapods; and the development of modern fauna. Plant life on land appeared in the early Phanerozoic eon. During this time span, tectonic forces which move the continents had collected them into a single landmass known as Pangaea (the most recent supercontinent), which then separated ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Electromagnetism
In physics, electromagnetism is an interaction that occurs between particles with electric charge. It is the second-strongest of the four fundamental interactions, after the strong force, and it is the dominant force in the interactions of atoms and molecules. Electromagnetism can be thought of as a combination of electricity and magnetism, two distinct but closely intertwined phenomena. In essence, electric forces occur between any two charged particles, causing an attraction between particles with opposite charges and repulsion between particles with the same charge, while magnetism is an interaction that occurs exclusively between ''moving'' charged particles. These two effects combine to create electromagnetic fields in the vicinity of charge particles, which can exert influence on other particles via the Lorentz force. At high energy, the weak force and electromagnetic force are unified as a single electroweak force. The electromagnetic force is responsible for many o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shatter Cone
Shatter cones are rare geological features that are only known to form in the bedrock beneath meteorite impact craters or underground nuclear explosions. They are evidence that the rock has been subjected to a shock with pressures in the range of . Morphology Shatter cones have a distinctively conical shape that radiates from the top (''apex'') of the cones repeating cone-on-cone in large and small scales in the same sample. Sometimes they have more of a spoon shape on the side of a larger cone. In finer-grained rocks such as limestone, they form an easily recognizable "horsetail" pattern with thin grooves (''striae''). However, the word "striae" should not be used to describe shatter cones, as that is considered misleading. Coarser grained rocks tend to yield less well developed shatter cones, which may be difficult to distinguish from other geological formations such as slickensides. Geologists have various theories of what causes shatter cones to form, including compress ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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