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Impact Structures listed by Age (Decreasing)
Current total number of confirmed impact structures: 176
To view list of decreasing ages click here.
Structure Name |
Age (Ma)*
|
~ 2400 |
|
2023 ± 4 |
|
~ 2000 |
|
1850 ± 3 |
|
< 1800 |
|
< 1800 |
|
> 1700 < 2100 |
|
1640 - 600 |
|
1630 ± 5 |
|
< 1400 |
|
< 1200 |
|
> 1000 |
|
~ 1000 |
|
< 1000 |
|
700 ± 5 |
|
646 ± 42 |
|
> 600 |
|
~ 600 |
|
~ 600 |
|
~ 590 |
|
> 570 |
|
~ 560 |
|
> 550 |
|
550 ± 100 |
|
> 545 |
|
> 515 |
|
< 508 |
|
< 505 |
|
500 ± 20 |
|
500 ± 10 |
|
< 500 |
|
< 500 |
|
< 500 |
|
~ 470 |
|
~ 470 |
|
470 ± 30 |
|
~ 455
| |
~ 455 |
|
450 ± 10 |
|
~ 450 |
|
445 ± 2 |
|
430 ± 25 |
|
< 430 |
|
400 ± 50 |
|
< 400 |
|
396 ± 20* |
|
395 ± 25 |
|
380 ± 5 |
|
378 ± 5* |
|
376.8± 1.7 |
|
364 ± 8 |
|
360 ± 20 |
|
< 360 |
|
351± 20 |
|
< 345 |
|
< 345 |
|
342 ± 15* |
|
320 ± 80 |
|
< 320 |
|
300 ± 50 |
|
< 300 |
|
< 300 |
|
< 300 |
|
< 300 |
|
290 ± 35 |
|
290 ± 20 |
|
290 ± 20 |
|
280 ± 10 |
|
< 280 |
|
250 ± 80 |
|
< 250 |
|
244.40 ± 3.25 |
|
~230 |
|
220 ± 32 |
|
214 ± 8 |
|
214 ± 1 |
|
200 ± 100 |
|
200 ± 25 |
|
< 200 |
|
190 ± 30 Ma |
|
190 ± 20 |
|
< 180 |
|
< 170 |
|
169 ± 7 |
|
167 ± 3 |
|
165 ± 5 |
|
> 160 ± 10 |
|
150 ± 70 |
|
150 ± 20 |
|
145.0 ± 0.8 |
|
142.5 ± 0.8 |
|
142.0 ± 2.6 |
|
128 ± 5 |
|
121.0 ± 2.3 |
|
120 ± 10 |
|
< 120 |
|
< 120 |
|
115 ± 10 |
|
< 110 |
|
< 100 |
|
99 ± 4 |
|
< 97 |
|
3 - 95 |
|
91± 7* |
|
89.0 ± 2.7 |
|
81.0 ± 1.5 |
|
80 ± 20 |
|
< 75 |
|
74.1± 0.1 |
|
73.3 ± 5.3 |
|
70.3 ± 2.2 |
|
< 70 |
|
< 70 |
|
< 70 |
|
< 70 |
|
65.17 ± 0.64 |
|
< 65 |
|
< 65 |
|
64.98 ± 0.05 |
|
< 60 |
|
58 ± 2 |
|
| Jebel Waqf as Suwwan | 56 - 37 |
50.50 ± 0.76 |
|
< 50 |
|
49.0 ± 0.2 |
|
49.0 ± 0.2 |
|
46 ± 7 |
|
46 ± 3 |
|
45 ± 10 |
|
42.3 ± 1.1 |
|
40 ± 20 |
|
40 ± 20 |
|
39 |
|
37.2 ± 1.2 |
|
36.4 ± 4* |
|
> 35 |
|
> 35 |
|
35.7 ± 0.2 |
|
35.3 ± 0.1 |
|
15.1 ± 0.1 |
|
15 ± 1 |
|
5 ± 3 |
|
5 ± 1 |
|
< 5 |
|
3.7 ± 0.3 |
|
3.5 ± 0.5 |
|
3.0 ± 0.3 |
|
< 3 |
|
1.4 ± 0.1 |
|
1.07 |
|
< 1 |
|
< 1 |
|
0.9 ± 0.1 |
|
< 0.3 |
|
~ 0.27 |
|
0.250 ± 0.050 |
|
0.220 ± 0.052 |
|
< 0.1 |
|
< 0.1 |
|
.0540 ± 0.0015 |
|
0.052 ± 0.006 |
|
< 0.05 |
|
0.049 ± 0.003 |
|
0.0214 ± 0.0097 |
|
< 0.01 |
|
< 0.007 |
|
~ 0.0066 |
|
.0042 ± 0.0019 |
|
0.004 ± 0.001 |
|
< 0.004 |
|
<0.0011 |
|
< 0.001 |
|
< 0.001 |
|
0.00014 |
|
0.000063 |
* 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 - Metasedimetary 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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Earth Impact Database Sorted by : | Age | Diameter | Name |
Impact Cratering Essay
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PASSC Director: John Spray
Data Manager
Last updated November 27, 2009
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Queries to: passc@unb.ca