It was previously thought that the rare diamond bearing rock type known as kimberlite had not erupted for 25 million years. On the contrary, it was recently discovered that a small insignificant volcano in Tanzania produced batches of kimberlite a mere 12,000 years ago. So, why did kimberlite form at this volcanic complex, which is known as the Igwisi Hills?

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Graphics of eruption dates are courtesy of the Global Volcanism Program, Smithsonian Institution. https://volcano.si.edu/
Images with a list of eruption dates have their dates sources from the GVP of the Smithsonian Institution.

Google Earth imagery used in this video: ©Google & Data Providers

Thumbnail Photo Credit: Larsen, J. F., AVO/UAF-GI

0:00 Diamonds
0:53 Formation of Kimberlite
1:30 Rarity of Kimberlites
2:02 Geologic Setting
3:11 Trend of Activity
4:05 Conclusion

Sources:
[1] Global Volcanism Program, 2013. Volcanoes of the World, v. 4.11.2 (02 Sep 2022). Venzke, E (ed.). Smithsonian Institution. Downloaded 06 Sep 2022. https://doi.org/10.5479/si.GVP.VOTW4-2013.
[2] Global Volcanism Program, 2013. Igwisi Hills (222161) in Volcanoes of the World, v. 4.11.2 (02 Sep 2022). Venzke, E (ed.). Smithsonian Institution. Downloaded 06 Sep 2022 (https://volcano.si.edu/volcano.cfm?vn=222161). https://doi.org/10.5479/si.GVP.VOTW4-2013

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