Analysis: Older Than Dirt

On Earth, only magma, water, the (periodic) elements, and the Earth itself is older than dirt. Dirt is older than the dinosaurs (300MYA+). Dirt is older than flowering plants (650 MYA+). Dirt is probably 2BYA+, though I'm no expert on prehistoric ages. How about, older than (the/any) alphabet, or something like that.
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