Evidence · Eye of the Sahara and Atlantis

Carbonatite dated 99 ± 5 Ma and breccia feldspar 98.2 ± 2.6 Ma tie the hydrothermal breccia to Cretaceous magmatism

Apatite fission tracks date the carbonatite to 99 ± 5 million years, and 40Ar/39Ar on new-grown potassium feldspar in the breccia's internal sediment gives 98.2 ± 2.6 million years, so the breccia formed with the magmatism.

Established0

What it bears on 1 answer

A buried alkaline intrusion domed the rocks about 100 million years ago; erosion cut the dome into rings

Still possible

FOR

Cite it

Mysteries Department. (2026). Carbonatite dated 99 ± 5 Ma and breccia feldspar 98.2 ± 2.6 Ma tie the hydrothermal breccia to Cretaceous magmatism [Evidence EVD0DCKS0C49HJ3]. https://mysteriesdept.com/r/EVD0DCKS0C49HJ3

@misc{mysteriesdept_evd0dcks0c49hj3,
  title     = {Carbonatite dated 99 ± 5 Ma and breccia feldspar 98.2 ± 2.6 Ma tie the hydrothermal breccia to Cretaceous magmatism},
  author    = {{Mysteries Department}},
  year      = {2026},
  note      = {Evidence, catalog key EVD0DCKS0C49HJ3},
  url       = {https://mysteriesdept.com/r/EVD0DCKS0C49HJ3}
}