Afar Depression
The Afar Depression, also called the Afar Triangle, is a tectonically active lowland in the Horn of Africa where the Red Sea Rift, Gulf of Aden Rift and Main Ethiopian Rift converge. Its rifting, volcanic activity and evolving crust make it a notable example of continental breakup in progress.
Location and setting
The Afar Depression lies within the Afro-Arabian Rift System. It spans parts of northeastern Ethiopia, southeastern Eritrea and Djibouti. The Danakil Depression is a low-lying part of the Afar region and is also referred to as the Afar Depression in geological sources.
A meeting of rift systems
The northern Main Ethiopian Rift, southern Red Sea and western Gulf of Aden rifts meet in the Afar region. Their junction reflects the separation and relative movement of the Nubian, Arabian and Somalian plates. Geoscientific reviews describe the area as a rift–rift–rift triple junction and discuss the transition from continental extension toward seafloor spreading.
Volcanism and landscape
The depression contains volcanic and sedimentary formations of different ages, as well as active tectonic features. The International Union of Geological Sciences highlights the Danakil Depression, Erta’Ale volcano and the Dallol geothermal area as notable geological features. Faulting, volcanic activity and hydrothermal environments make the region important for studying active Earth processes.
Key facts
- Also known as
- Afar Triangle; the Danakil Depression is a related low-lying area also called the Afar Depression in some geological sources
- Region
- Horn of Africa; parts of Ethiopia, Eritrea and Djibouti
- Tectonic setting
- Junction of the Red Sea, Gulf of Aden and Main Ethiopian Rift systems
- Geological significance
- An active rift region documenting continental extension and the development of spreading centres
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References
- 1.Afar Triangle
Encyclopaedia Britannica · other · reliability: unverified · retrieved 9 November 2026
- 2.Tectonics of the Afar Depression: A review and synthesis
Journal of African Earth Sciences / Elsevier · other · reliability: unverified · retrieved 9 November 2026
- 3.The Danakil Rift depression and its volcanism
International Union of Geological Sciences · other · reliability: unverified · retrieved 9 November 2026
References are suggested by the research engine and may be incomplete. Unverified URLs are omitted rather than guessed.
Article history
- Version 19 November 2026 · EditorCreated by Zapia