What is zircon and what can it teach us about the history of Earth?

The oldest zircons suggest that a continental crust a hydrosphere, that is to say an ocean and sedimentary cycles ex, and sedimentary cycle existed on Earth as far back as 4.4 billion years ago. They also suggest that the Earth differentiated that is to say, the the bulk Earth, differentiated into a mantle and a core.

Explanation:

she forgot to record a transaction