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Zircon Image

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Large Zircon Image

Mineral: Zircon: ZrSiO4
Comments: Cathodoluminescence image of earth's oldest-known mineral (zircon grain - W74/2-36) with inset concordia plot showing the 4,404 billion year old region. Note the oscillatory zoning in the outer rim. Image by John W. Valley.
Location: Interlayered red quartzites and metaconglomerates, Jack Hills, Western Australia.
Scale: See Image.
Copyright: © University of Wisconsin
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