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@trucker09

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earthstory

An agatised branch

When volcanic ash engulfs forests during explosive eruptions the wood is often replaced when silica from the ash is remobilised by percolating groundwater, sometimes in exquisite detail preserving cellular structure. Other times, as evidenced by this 10.5 cm tall X 5.5 cm diameter limb cast found in Oregon, the branch becomes a mould that gets filled with silica gel, preserving the outside of the piece including all its knots, but none of the internal detail.

Loz

Image credit: LGF Foundation

Source: facebook.com
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sissi-zoey

For a little bit, if you don’t want it public, say so.

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trucker09

Ill answer anything!