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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
What is primordial crust ?
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Sajan sarthak Best Answer
Primary crust / primordial when a planet is originated from hot molten ball at the end of cooling the outer external covering is formed from less dense material incomparision to mantle and core. "original" crust. It forms from solidification of a magma ocean. Toward the end of planetary accretion, the terrestrial planets likely had surfaces that were magma oceans. As these cooled, they solidified into crust. This crust was likely destroyed by large impacts and re-formed several times as the Era of Heavy Bombardment of meteorites.
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Saurabh 1![best-answer]()
Well primordial crust was formed from the crystallization of the surface magma ocean during the Hadean. But the fact is we can rarely find such traces of crust dating back to hadean.So might be the subduction process prevailed during that time and thereby resulted into complete deformation of the layer. The results indicate that a substantial amount of the primordial crust could have been subducted through subduction channels into the deep mantle. These subducted primordial crust materials might have strongly influenced the thermal evolution of the mantle.