Eburnean orogeny
mountain building event in what is now West Africa
The Eburnean orogeny, or Eburnean cycle, was a series of tectonic, metamorphic and plutonic events in what is now West Africa during the Paleoproterozoic era about 2200–2000 million years ago.
During this period the Birimian domain in West Africa was established and structured.
Eburnian faults are found in the Eglab shield to the north of the West African craton and in the Man Shield to the south of the craton.
There is evidence of three major Eburnean magmatic events in the Eglab shield.
Between 2210 and 2180 Ma, a metamorphosed batholith was formed in the Lower Reguibat Complex (LRC).
Around 2090 Ma, a syntectonic trondhjemitic pluton intruded into the Archaean reelects of the Chegga series. Around 2070 Ma an asthenospheric upwelling released a large volume of post-orogenic magmas.
Eburnian trends within the Eglab shield were repeatedly reactivated from the Neoproterozoic to the Mesozoic.
“Eburnean orogeny” enters the record as mountain building event in what is now West Africa. Crown Archives preserves that source wording while asking what Eburnean, orogeny and mountain can confirm, complicate or overturn.
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Place names and jurisdictional language are key evidence: both can reveal earlier catalogue descriptions and overlooked record series. The source revision retrieved here is dated Sep 7, 2026. The linked authority identifier is Q5332113. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2000, 2090 and 2070.
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This entry incorporates text from “Eburnean orogeny” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.