Can carbon 14 used dating lava flows

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Geologists do not use carbon-based radiometric dating to determine the age of rocks.

Carbon dating only works for objects that are younger than about 50,000 years, and most rocks of interest are older than that.

Any charcoal or wood sample that is carbon dated will have an apparent age, which may result in errors of up to hundreds of years unless short-lived tree species or twigs are selected for radiocarbon dating.

In Italy, engineers have installed retaining walls to try and…

But the rock that makes up lava has very little carbon content, and it wouldn't necessarily be of any help in dating it anyway, since it came from underground and was only…

Different methods have been used including: breaching the sides of a lava tube or channel, diverting the flow, constructing barriers, and bombing the lava flow.

It may be possible in some special cases where the lava contains embedded organic material (plants and animals that were caught in the lava flow), or where there are significant inclusions of air (due to carbon dioxide in the air).

But the rock that makes up lava has very little carbon content, and it wouldn't necessarily be of any help in dating it anyway, since it came from underground and was only very briefly exposed to atmospheric 14C. Lava itself does not contain much carbon and comes from material too old for there to be detectable levels of carbon 14.

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