# The gabbro rings belong to the same Cretaceous complex, emplaced around 104 to 94 Ma

> Still possible: The gabbro ring dykes were emplaced with the carbonatites and kimberlites as one Cretaceous igneous complex, around 104 to 94 million…

Source: https://mysteriesdept.com/mysteries/eye-of-the-sahara/answers/ANS0DCKS7XXBARQ/the-gabbro-rings-belong-to-the-same-cretaceous-complex  
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[Questions](https://mysteriesdept.com/questions)[Eye of the Sahara and Atlantis](https://mysteriesdept.com/mysteries/eye-of-the-sahara)[When were the gabbro ring bodies of the Richat emplaced?](https://mysteriesdept.com/mysteries/eye-of-the-sahara/questions/QST0DCKRG957638/when-were-the-gabbro-ring-bodies-of-the-richat-emplaced)Answer

Answer · Eye of the Sahara and Atlantis

# The gabbro rings belong to the same Cretaceous complex, emplaced around 104 to 94 Ma

The gabbro ring dykes were emplaced with the carbonatites and kimberlites as one Cretaceous igneous complex, around 104 to 94 million years ago.

**Still possible** Answers **1** question0

## Where it stands

**Still possible** One piece of evidence for, one against. It needs two reviews to be accepted.

## What it predicts

- A robust radiometric age on the gabbros falls between about 104 and 94 Ma.
- Gabbro chemistry relates to the alkaline magmas of the complex.

## What would rule it out

- A robust gabbro age older than about 150 Ma, or a chemistry matching an unrelated older province.

## Evidence 1 for · 1 against

[Matton and Jébrak infer an age of about 104 to 94 Ma for the whole mafic-to-felsic sequence](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSG0HPGMT/matton-and-jebrak-infer-an-age-of-about-104-to-94-ma-for-the)

Suggestive

FOR

[Plagioclase 40Ar/39Ar modelling places the gabbros at 230 to 200 Ma, not in the Cretaceous](https://mysteriesdept.com/mysteries/eye-of-the-sahara/evidence/EVD0DCKSGCEA21B/plagioclase-40ar-39ar-modelling-places-the-gabbros-at-230-to)

Suggestive

AGAINST

## The questions it answers

[When were the gabbro ring bodies of the Richat emplaced?](https://mysteriesdept.com/mysteries/eye-of-the-sahara/questions/QST0DCKRG957638/when-were-the-gabbro-ring-bodies-of-the-richat-emplaced)

Part of [How did the Richat Structure form?](https://mysteriesdept.com/mysteries/eye-of-the-sahara/questions/QST0DCKRBKSRCJA/how-did-the-richat-structure-form)

Open3 answers, none ahead

## Cite it

```
Mysteries Department. (2026). The gabbro rings belong to the same Cretaceous complex, emplaced around 104 to 94 Ma [Answer ANS0DCKS7XXBARQ]. https://mysteriesdept.com/r/ANS0DCKS7XXBARQ
```

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**ANS** 0DCKS7XXBARQ

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Answer · hypothesis

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[Session 1](https://mysteriesdept.com/mysteries/eye-of-the-sahara/sessions/SES0DCKZYK2CKXF/session-1-the-eye-of-the-sahara-and-the-atlantis-claim) · 28 Oct 2026

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