Uh what’s the second layer of the Grand Canyon made of
Please.

The second layer of the Grand Canyon is made of Kaibab Limestone.

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this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.