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Lumparn
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{{Infobox terrestrial impact site | name = Lumparn | other_name = Lumpari | photo = Lumparn.png | photo_size = | photo_alt = | photo_caption = Lumparn with the impact structure area in grey | map = Finland | map_alt = | map_caption = Location of the crater in the Botnian Gulf | map_size = 250 | location = [[Fasta Åland]] | label = | label_position = | coordinates = {{coord|60|9|N|20|6|E|display=inline,title}} | coordinates_ref = | confidence = Confirmed | diameter = {{convert|9|km|mi|abbr=on}} | depth = | rise = | imp_size = | age = ~1000 Ma<br>[[Proterozoic]] | exposed = No | drilled = Yes | bolide = | translation = | language = | pronunciation = | topo = | access = | country = {{flag|Finland}} | state = | province = [[Åland]] | district = [[Åland]] | municipality = [[Sund, Åland|Sund]], [[Lumparland]], [[Lemland]] & [[Jomala]] }} '''Lumparn''' (fi. ''Lumpari'') is a large [[bay]] devoid of islands in the [[Fasta Åland|main island]] of [[Åland]], [[Finland]], bordered by [[Sund, Åland|Sund]] to the north, [[Lumparland]] to the east, [[Lemland]] to the south and [[Jomala]] to the west. == Description == Most of the bay fills a nine kilometer wide [[impact structure]]. The structure is estimated to be about 1000 million years old ([[Proterozoic]]).<ref>{{cite Earth Impact DB | name = Lumparn| accessdate = 2009-08-15}}</ref> The depression was originally believed to be a [[rift]]. Extraterrestrial origin was first proposed in 1979, but not until 1993 was the impact structure finally confirmed. Long [[shatter cones]] have been discovered in the southwestern part of the bay. The remains of the crater are filled with sediments. Between [[Pleistocene]] sediments and crushed [[rapakivi granite]] [[bedrock]] there is a layer of [[Paleozoic]] ([[Ordovician]]) [[limestone]]s. This makes Lumparn one of the few places in Finland where [[fossil]]s have been found. The bay has also previously been referred to as ''Lumpari''<ref>[http://water.worldcitydb.com/lumpari_1978598.html Lumpari World Water Features Database | WorldCityDB.com<!-- Bot generated title -->] {{webarchive|url=https://web.archive.org/web/20070927035612/http://water.worldcitydb.com/lumpari_1978598.html |date=2007-09-27 }}</ref> in some [[Finnish language|Finnish]] documents, though the [[Research Institute for the Languages of Finland]] does not list ''Lumpari'' as in current usage.<ref>[http://kaino.kotus.fi/www/verkkojulkaisut/ortnamn/ortnamn2.html#L Svenska Ortnamn i Finland] {{webarchive|url=https://web.archive.org/web/20071113223403/http://kaino.kotus.fi/www/verkkojulkaisut/ortnamn/ortnamn2.html |date=2007-11-13 }}, The Research Institute for the Languages of Finland, see "Lumparn"</ref> == Gallery == [[File:Lumparn (panorama).jpg|thumb|left|600px|Panorama over Lumparn, seen from the south coast. On the horizon, a small part of Sund is just visible.]] {{clearleft}} == See also == * [[Impact craters in Finland]] == References == {{reflist}} == External links == * [https://web.archive.org/web/20070927213438/http://www.somerikko.net/old/geo/imp/lumpa_e.htm Lumparn impact structure] (archived link) * {{in lang|fi}}<!--Finnish--> [http://www.helsinki.fi/ml/maant/suomi.html The Landforms of Finland] * {{cite journal | author=Svensson, N.-B. | title=Lumparn Bay: A Meteorite Impact Crater in the Aland Archipelago, Southwest Finland | journal=Meteoritics | year=1993 | volume=28 | issue=3 | pages=445 | bibcode=1993Metic..28S.445S }} * [https://www.openstreetmap.org/#map=12/60.15/20.13333 Map of Lumparn] {{Impact cratering on Earth}} [[Category:Impact craters of Finland]] [[Category:Proterozoic impact craters]] [[Category:Mesoproterozoic Europe]] [[Category:Landforms of Åland]] {{Åland-geo-stub}}
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