Radiometric dating of the oldest rocks on earth


23-Aug-2019 15:54

radiometric dating of the oldest rocks on earth-24

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The first major episode of eruption formed much of the volcanic rock exposed in the central New Territories.

These rocks are dominantly crystal-rich ashes containing abundant rock fragments.

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Although the caldera that produced the ash has long since disappeared, its approximate location can be determined from the concentration of volcanic vent-type materials and the associated plutonic rocks.

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