Evidence · Eye of the Sahara and Atlantis

Plagioclase 40Ar/39Ar modelling places the gabbros at 230 to 200 Ma, not in the Cretaceous

The first 40Ar/39Ar work on gabbro plagioclase gave no robust age, but numerical modelling of the results places the intrusion between 230 and 200 million years ago.

Suggestive0

What it bears on 1 answer

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

Still possible

AGAINST

Cite it

Mysteries Department. (2026). Plagioclase 40Ar/39Ar modelling places the gabbros at 230 to 200 Ma, not in the Cretaceous [Evidence EVD0DCKSGCEA21B]. https://mysteriesdept.com/r/EVD0DCKSGCEA21B

@misc{mysteriesdept_evd0dcksgcea21b,
  title     = {Plagioclase 40Ar/39Ar modelling places the gabbros at 230 to 200 Ma, not in the Cretaceous},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Evidence, catalog key EVD0DCKSGCEA21B},
  url       = {https://mysteriesdept.com/r/EVD0DCKSGCEA21B}
}