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Earth Impact Database Sorted by : | Name | Diameter | Age |

 

Hummeln

Crater Name
Location
Latitude
Longitude
Diameter (km)
Age (Ma)*
Exposed
Drilled
Target Rock**
Bolide Type***
Hummeln
Sweden
N 57°22'
E 16° 15'
~ 1.2
~ 443-470
Y
Y
C
Chondrite

 

References
Alwmark, C., Ferrière, L., Holm-Alwmark, S., Ormö, J., Leroux, H., and Sturkell, E. 2015. Impact origin for the Hummeln structure (Sweden) and its link to the Ordovician disruption of the L chondrite parent body. Geology. doi:10.1130/G36429.1
Ferrière, L., Alwmark, C., Holm-Alwmark, S., Ormö, J., Leroux, H. and Sturkell, E. The Hummeln structure (Sweden) – Impact origin confirmed and its link to the L-chondrite parent body break-up event. Lunar and Planetary Science XXXXVI, (1758.pdf). 2015.
Lindström, M., Flodén, T., Grahn, Y., Hagenfeldt, S., Ormö, J., Sturkell, E.F.F. and Törnberg, R. The Lower Palaeozoic of the probable impact crater of Hummeln, Sweden. GFF, 121:243–252, doi: 10.1080/11035899901213243. 1999.
Ormö, J., Sturkell, E.F.F., Blomqvist, G. and Törnberg, R. Mutually constrained geophysical data for the evaluation of a proposed impact structure: Lake Hummeln, Sweden. Tectonophysics, 311:155–177, doi: 10.1016/S0040-1951(99)00158-4. 1999.

 

* 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)

 

 

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