|Crater Name||Location||Latitude||Longitude||Diameter (km)||Age (Ma)||Exposed||Drilled||Target Rock**||Bolide Type***|
|Ritland||Norway||N 59° 14'||E 6° 26'||2.7||520 ± 20||Y||N||C||-|
View of the Ritland impact structure looking towards the south. Dashed line indicate approximate extent of the structure (Photo provided by Knut Vindfallet).
|Azad, A. S., Tomczyk, M., Dypvik, H., Kalleson, E. and Riis, F. 2011. Syn-impact and early-post impact sedimentation in the Ritland impact structure, Western Norway. Geological Society of Norway, Winter Meeting, Stavanger, Norway (abstract).|
|Beyer, C. 2011. Palaeomagnetic investigation of the Ritland structure. Geological Society of Norway, Winter Meeting, Stavanger, Norway (abstract).|
|Kalleson, E., Dypvik, H. and Riis, F. 2010. The Ritland impact structure, Western Norway. 41th Lunar and Planetary Science Conference, Houston, Texas. (abstract #1326).|
|Kalleson, E., Riis, F., Setså, R., Azad, A. and Dypvik, H. 2011. The Ritland impact structure – shock deformation in minerals and outcrops. Geological Society of Norway, Winter Meeting, Stavanger, Norway (abstract).|
|Riis, F., Kalleson, E., Dypvik, H., Krøgli, S.-O. and Nilsen, O. 2011. The Ritland impact structure, southwestern Norway. Meteoritics and Planetary Science, v. 46, pp. 748-761.|
|Riis, F., Kalleson, E., Setså, R., Azad, A. and Dypvik, H. 2011.The Ritland impact structure – new evidence on age, environment and mechanisms of impact. Geological Society of Norway, Winter Meeting, Stavanger, Norway (abstract).|
| * pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present.
** Abbreviations: C - Crystalline Target; C-Ms - Metasedimentary Target; M - Mixed Target (i.e.sedimentary strata overlying crystalline basement); S - sedimentary target (i.e. no crystalline rocks affected by the impact event). From Osinski. G. R., Spray J. G., and Grieve R. A. F. 2007. Impact melting in sedimentary target rocks: A synthesis. In The Sedimentary Record of Meteorite Impacts, Geological Society of America Special Paper. Editors: Evans K. Horton W., King D., Morrow J., and Warme J. Geological Society of America: Boulder, in press.
***From Koeberl,C. Identification of meteoritic components in impactites. 1998, Koeberl, C. The Geochemistry and Cosmochemistry of Impacts. 2007 and PASSC Files. (IAB, IIIAB, IIIB, IIID - Iron Meteorite)