Isotope dating of rocks new thread sedating patient

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Or, it could have been rapid-moving floodwaters that lodged the Tava sandstone sediment into a fracture in the granite, explaining the intrusion, Siddoway added.

Whether it was an earthquake or a flood that set the formation into motion, the intrusion as we see it today can be explained by "natural fracking," she said.

Typically, it is igneous rocks, such as granite, that intrude into sedimentary stone.

Ignorance of the variation has created small errors in our chronology of the world.

Correcting this oversight should put geological dating on a solid scientific footing for the first time.

A swimming race illustrates the simple principles involved in measuring time.

This swimmer is competing in a 1,500 metre race and we have an accurate, calibrated wristwatch.

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