Stratigraphic Record

[[A view of the Earth from space.]] Nearly 4.5 billion years ago, Earth had liquid water. But all the crust older than 3.5 billion years has been recycled into the mantle by subduction. [[The same view.]] A billion years of the stratigraphic record, the memory of the hills, is forever lost to us. What was it like here, four billion years ago? [[The same view.]] Earth, what secrets do you have? [[The same view.]] Earth: come closer [[A closer view.]] [[An even closer view.]] Earth: i'll never tell. {{Title text: All we have are these stupid tantalizing zircons and the scars on the face of the Moon.}}

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