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Related Experiment Video

Updated: Jul 21, 2026

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Emission Spectroscopic Boundary Layer Investigation during Ablative Material Testing in Plasmatron

Published on: June 9, 2016

Impact ejecta layer from the mid-Devonian: possible connection to global mass extinctions.

Brooks B Ellwood¹, Stephen L Benoist, Ahmed El Hassani

¹Department of Geology and Geophysics, Louisiana State University, E235 Howe-Russell Geoscience Complex, Baton Rouge, LA 70803, USA.

Science (New York, N.Y.)

|June 14, 2003

Summary

A mid-Devonian asteroid impact in Morocco is linked to a major marine extinction event. Evidence includes shocked quartz and chemical anomalies, potentially causing the extinction of 40% of marine genera.

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Conducting Elevated Temperature Normal and Combined Pressure-Shear Plate Impact Experiments Via a Breech-end Sabot Heater System

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Published on: August 7, 2018

Area of Science:

Geology
Paleontology
Planetary Science

Background:

The mid-Devonian period experienced significant environmental changes and biodiversity shifts.
Mass extinction events can drastically alter marine ecosystems and evolutionary trajectories.

Purpose of the Study:

To investigate potential extraterrestrial impact evidence in the Anti Atlas desert, Morocco.
To determine if this impact event correlates with the Kacák/otomari extinction.

Main Methods:

Geochemical analysis for elemental anomalies (Ni, Cr, As, V, Co).
Petrographic examination for shocked quartz and microspherules.
Stable isotope analysis (carbon isotopes) to detect environmental shifts.

Main Results:

Discovery of shocked quartz, anomalous concentrations of specific elements, and microspherules at Jebel Mech Irdane.
A significant negative carbon isotope excursion (-9 per mil) was recorded.
The impact evidence is dated to the mid-Devonian, coinciding with the Kacák/otomari extinction event.

Conclusions:

The findings provide strong evidence for a bolide impact in the mid-Devonian.
This impact event is a potential trigger for the major marine extinction, which eliminated up to 40% of marine genera.