Oldest rocks on earth radiometric dating

Wikipedia The Genesis Rock is Moon rock sample collected during the Apollo 15 mission by astronauts James Irwin and David Scott from the Spur crater.

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It is hypothesized that the accretion of Earth began soon after the formation of the Ca-Al-rich inclusions and the meteorites.

Because the exact accretion time of Earth is not yet known, and the predictions from different accretion models range from a few million up to about 100 million years, the exact age of Earth is difficult to determine.

Studies of strata, the layering of rock and earth, gave naturalists an appreciation that Earth may have been through many changes during its existence.

These layers often contained fossilized remains of unknown creatures, leading some to interpret a progression of organisms from layer to layer.

However, there have been several discoveries of terrestrial rock formations that are nearly as old as the Earth itself.

In addition to these ancient rock formations, some of the oldest rocks in the world came from outer space as either rock samples from the Moon or meteorites.

Wikipedia Prior to the discovery of the Nuvvuagittuq greenstone belt, the Acasta Gneiss was the oldest rock formation found on Earth, the oldest parts of which date back to about 4.031 billion years. Due to its age, the Acasta Gneiss was formed during the Hadean, the earliest eon in Earth’s history and it is only about a half-billion years younger than the Earth itself.

However, due to the contention surrounding the methods used to determine the age of the Nuvvuagittuq rocks, many people still consider the Acasta Gneiss the oldest known intact crustal rock ever found. Wikipedia Alan Hills 84001 (commonly abbreviated as ALH84001) is a meteorite that was found in Antarctica in 1984 – it is believed to be from Mars.

Wikipedia In 2001, geologists found the oldest known rocks on Earth, the Nuvvuagittuq greenstone belt, on the coast of the Hudson Bay in northern Quebec.

Geologists dated the oldest parts of the rockbed to about 4.28 billion years ago, using ancient volcanic deposits, which they call “faux amphibolite”.

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