Teghaza 001 Reveals 4.1-Billion-Year-Old Martian Crust as Study Recasts Early Mars Water Cycle
Updated
Updated · The Week · Nov 9
Teghaza 001 Reveals 4.1-Billion-Year-Old Martian Crust as Study Recasts Early Mars Water Cycle
3 articles · Updated · The Week · Nov 9
Summary
Teghaza 001, a 4.1-billion-year-old meteorite found in the Sahara, appears to be the first sample of Martian crust from a previously unsampled region, according to a Science study.
Its distinct mineral mix suggests Mars’ crust formed from cooling magma and was later altered by subsurface water, placing the rock within roughly the planet’s first 400 million years.
That evidence points to a more dynamic early Martian water cycle than previously thought, with researchers saying the meteorite may preserve signs of water-rock interaction and even atmospheric water loss.
Because most other Martian meteorites are about 2 billion years younger, the find helps bridge a long-standing mismatch with observations showing much of Mars’ surface is older than 3 billion years.
Researchers say the sample could also sharpen comparisons with Earth, whose tectonic activity erased most primordial crust, helping explain why Mars dried out while Earth remained habitable.