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The sediments and fossils at
Ritland have been studied by geologists since the 1950s. The depth of the circular structure is about 350 metres (1,150 ft), with a diameter of about 2 kilometres (1.2 mi). Research has focused on trying to find evidence that the crater resulted from a meteoric
178:. The crater is about 2 kilometres (1.2 mi) in diameter, and was created when a meteorite with an estimated diameter of 100 metres (330 ft) struck here about 500–600 million years ago. The crater was later buried by sediments, of which it has been partly recovered.
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The sediments in the crater are described as landslides in the bottom of the crater, followed by shale sediments deposited during a period when the sea had invaded the area. On top of the clay sediments are coarser sediments. During the
202:, as fossils from mid Cambrian are found in sediments that have accumulated in the crater. The evidence for the structure being an impact crater stems from the identification of
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considered it proven that the crater was formed by meteorite impact, according to
Professor Henning Dypvik from the Institute for Geological Sciences at the University of Oslo.
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impact. In 2008 it was announced that microscopic evidence was found, and that the structure is an impact crater. The crater dates from before mid
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The structure was first discovered as a possible (suspected) impact crater in 2000 by geologist
Fridtjof Riis.
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particles, which only form under the very high pressures (5-10 GPa) present during a meteoric impact.
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299:"The Ritland crater – An early Cambrian impact structure in West Norway (abstract)"
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218:. The overlaying mountains were later eroded, and the crater was again exposed.
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has funded scientific research on the crater. In 2009, scientists from the
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Planetary and Space
Science Centre University of New Brunswick Fredericton
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170:. The crater is about 15 kilometres (9.3 mi) east of the village of
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Fridtjof Riis; Henning Dypvik; Svein Olav Krøgli (August 2008).
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the crater was buried under a several kilometre thick
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174:and about 8 kilometres (5.0 mi) south of the
303:33rd International Geological Congress, Oslo 2008
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328:Riis, Fridtjof (14 December 2008).
268:"Norsk meteorittkrater under lupen"
390:Map overview of the Ritland crater
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334:Norwegian Petroleum Directorate
266:Bjørnæs, Ingvil (3 June 2009).
272:The Research Council of Norway
183:The Research Council of Norway
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953:Lunar and Planetary Institute
785:Cretaceous–Paleogene boundary
845:Planar deformation features
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948:Impact Field Studies Group
57:2 kilometres (1.2 mi)
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431:Impact cratering on Earth
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986:Impact craters of Norway
918:William Kenneth Hartmann
584:Clearwater East and West
532:Confirmed≥20 km diameter
369:59.2465722°N 6.4215083°E
162:municipality in eastern
991:Cambrian impact craters
835:Ordovician meteor event
41:Impact crater/structure
16:Impact crater in Norway
938:Eugene Merle Shoemaker
815:Late Heavy Bombardment
996:Landforms of Rogaland
981:Earth Impact Database
959:Traces of Catastrophe
943:Earth Impact Database
891:Ralph Belknap Baldwin
374:59.2465722; 6.4215083
241:Earth Impact Database
395:Ritland presentation
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158:at Ritland farm in
855:Shock metamorphism
760:Alvarez hypothesis
212:Caledonian orogeny
187:University of Oslo
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908:Edward C. T. Chao
278:on 1 January 2017
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933:Peter H. Schultz
896:Daniel Barringer
805:Impact structure
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357:59°14′47.66″N
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928:Graham Ryder
850:Shatter cone
840:Philippinite
689:Saint Martin
684:Rochechouart
589:Gosses Bluff
544:Amelia Creek
447:Impact event
360:6°25′17.43″E
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337:. Retrieved
306:. Retrieved
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280:. Retrieved
276:the original
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249:. Retrieved
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176:Jøsenfjorden
151:
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113:Municipality
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724:Tookoonooka
709:Steen River
699:Siljan Ring
629:Manicouagan
614:Keurusselkä
372: /
67:520 ± 20 Ma
1001:Hjelmeland
975:Categories
865:Stishovite
765:Australite
744:Yarrabubba
714:Strangways
674:Presqu'île
649:Montagnais
619:Lappajärvi
569:Charlevoix
554:Beaverhead
549:Araguainha
503:By country
473:Antarctica
222:References
160:Hjelmeland
117:Hjelmeland
46:Confidence
830:Moldavite
825:Meteorite
810:Impactite
739:Woodleigh
734:Vredefort
694:Shoemaker
654:Morokweng
639:Mistastin
579:Chicxulub
483:Australia
463:Worldwide
236:"Ritland"
49:Confirmed
884:Research
729:Tunnunik
624:Logancha
594:Haughton
564:Carswell
508:Possible
200:Cambrian
166:county,
164:Rogaland
107:Rogaland
103:District
88:Location
54:Diameter
875:Tektite
870:Suevite
775:Coesite
770:Breccia
719:Sudbury
669:Popigai
664:Obolon'
644:Mjølnir
609:Karakul
599:Kamensk
559:Boltysh
539:Acraman
339:12 June
308:12 June
193:Details
93:Country
80:Drilled
72:Exposed
753:Topics
634:Manson
488:Europe
468:Africa
282:8 June
251:25 May
168:Norway
154:is an
97:Norway
456:Lists
604:Kara
341:2009
310:2009
284:2009
253:2016
150:The
75:Yes
63:Age
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318:^
301:.
244:.
238:.
83:No
423:e
416:t
409:v
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286:.
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Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
