How old is the earth based on radiometric dating marijuana and dating
Radiocarbon dates come from organic matter that contain the element carbon.
Ice cores, pollen, wood, hair, bone, shell, bird egg shell, and coral are some of the things datable by this technology which depends on measuring the atomic decay rate of carbon isotopes.
The radiocarbon dating method is based on the fact that radiocarbon is constantly being created in the atmosphere by the interaction of cosmic rays with atmospheric nitrogen.
What scavengers like vultures and hyenas leave behind, flies, ants, worms, and bacteria quickly consume.
Material older than about 50,000 years can’t be dated with radiocarbon techniques because too little of the original radioactive material remains.
Modern labs can measure samples as small as 100 mg (0.003 oz) to a precision of ±16 years (Radiocarbon Web Info) Most fossil are dated by decay of isotopes such as Uranium 235, Potassium 40, and Rubidium 87 that have much longer half-lives than carbon 14.
The method was developed by Willard Libby in the late 1940s and soon became a standard tool for archaeologists.
Libby received the Nobel Prize in Chemistry for his work in 1960.