Erg Chech 002

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Recently, some unusual rocks containing distinctive greenish crystals were found in the Erg Chech sand sea.

About Erg Chech 002

  • What it is? These are the rocks containing distinctive greenish crystals, it turned out to be from outer space, left over from the dawn of the Solar System.
  • They were all pieces of a meteorite known as Erg Chech 002, which is the oldest volcanic rock ever found.
  • It is known as an “ungrouped achondrite” means their parent bodies and family relationships are unknown.
  • Achondrites are rocks formed from melted planetesimals, which is what we call solid lumps in the cloud of gas and debris that formed the Solar System.
  • Erg Chech 002 contains a high abundance of lead-206 and lead-207, as well as relatively large amounts of undecayed uranium-238 and uranium-235.
  • Aluminium-26 was distributed quite unevenly throughout the cloud of dust and gas which formed the solar system.


Key facts about Erg Chech

  • It is a sandy region of the Sahara in western Algeria and northern Mali.
  • It consists largely of shifting dunes.


Q1) What is Uranium-238?

Uranium-238 (U-238) is a radioactive isotope of uranium, a chemical element with the symbol U and atomic number 92. It is one of the two primary isotopes of uranium found in nature, the other being uranium-235 (U-235).

Source: Sahara space rock, 4.5 billion years old, upends assumptions about the early Solar System.