The rare meteorite, estimated to be 4.6 billion years old, was found by a team led by Jean-Alix Barrat of Université de Bretagne Occidentale. Results of the study have been published in PNAS.
Named Erg Chech 002 (EC 002), after the Algerian site where it was discovered, the rock is a rare artefact from a protoplanet — a large body of matter in orbit around the Sun or another star, and believed to be developing into a planet — that was likely forming when the solar system was a young 2 million years old.
The meteorite was part of a group that was recovered in May 2020 near Bir Ben Takoul, southern Algeria, within the Erg Chech sand sea. The stones are described as having a “coarse grained, tan and beige appearance” interspersed with crystals that are green, yellow-green, and yellow-brown.
The oldest volcanic rock we have ever discovered may help us understand the building blocks of planets. The meteorite, which was discovered in the Sahara desert in 2020, dates from just 2 million years after the formation of the solar system – making it more than a million years older than the previous record-holder.
Since no known asteroid resembles EC 002, the researchers suspect that no other remnants are left from these early times.
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©2021 Darryl Pitt / Christie’s / pix: newscientist.com
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ALGERIA