Why is there no rock record from the hadeanperiod?

Answer 1

There is no rock record from the Hadean period primarily because the Earth's surface was extremely hot and geologically active, leading to the frequent melting and recycling of crustal materials. Additionally, the planet was bombarded by meteorites, which further disrupted any potential rock formation. The earliest solid crust likely formed only after the planet cooled sufficiently, transitioning into the Archean Eon, where the oldest known rocks originate. Thus, any Hadean rocks that may have existed were either destroyed or have not survived to the present day.