File:K-T-boundary.JPG
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Summary
| Description |
English: The intermediate claystone layer contains 1000 times more iridium than the upper and lower layers. It is the boundary between Cretaceous and Tertiary Periods. Picture taken by the author at San Diego Natural History Museum. The rock is from Wyoming, USA. |
| Date | |
| Source | Own work |
| Author | Zimbres - Attribute it to Eurico Zimbres |
| Permission (Reusing this file) |
Free for all use |
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| Annotations | This image is annotated: View the annotations at Commons |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 14:40, 8 January 2020 | | 2,274 × 1,913 (967 KB) | wikimediacommons>Soerfm | Brightness, color |
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