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Common materials for radiocarbon dating are: The radiocarbon formed in the upper atmosphere is mostly in the form of carbon dioxide. Because the carbon present in a plant comes from the atmosphere in this way, the radio of radiocarbon to stable carbon in the plant is virtually the same as that in the atmosphere.Plant eating animals (herbivores and omnivores) get their carbon by eating plants.

This date marks the end of the Cenozoic Era and the Pleistocene Period on the geologic time scale.Geologists credit stromatolite activity for creating the earth's first atmospheric oxygen and making animal life possible. It’s important that we allow God’s written record of history, the Bible, to guide our thinking about the past—this includes our understanding of the age of the Earth/universe How many times have you heard something like, “This animal lived 50,000 years ago”, or “This person died 20,000 years ago’?This chart uses both radiometric, relative comparisons, fossils, and reversals in the earth’s magnetic field to order events in the history of the earth.Living stromatolites in Shark Bay World Heritage Site of Western Australia are built by colonies of bacteria that draw energy from the sun and carbon dioxide, releasing oxygen (photosynthesis).

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