Radiometric Dating

“…the exponential decay-law … is the cornerstone on which the common measurement system of radioactivity is built.”
Pomme, et al. (2018)[3, p.6]

Radiometric dating was invented in 1905 by Ernest Rutherford.

Useful abbreviations for years:
Ka = Kiloannum (1,000 years)
Ma = ? annum (1,000,000 years)
Ga = Gigaannum (1,000,000,000 years)

The methods of radiometric dating are:

Argon-argon (Ar-Ar) was invented by Grenville Turner in the 1960’s (?).
Applicable age range:

Beryllium (Surface exporsure?) (10Be–9Be)

Half-life: 1.52 million[8]

Half-life: 300,000[8]

Fission track
Applicable age range: 1,000-billion of years[5]

Iodine-xenon (I-Xe)
Applicable age range:

Krypton-krypton (Kr-Kr)
Applicable age range:

Lanthanum-barium (La-Ba)
Applicable age range:

Lead-lead (Pb-Pb)
Applicable age range:

Applicable age range: 1,000-1,000,000[5]

Lutetium-hafnium (Lu-Hf)
Half-life: 38 billion[8]
Applicable age range:

Potassium-argon (K-Ar) was invented in the 1920’s and 1930’s.[1]
Half-life: 1.3 Ga,[7] 1.26 billion[8]
Applicable age range: 1,000-billion of years,[5] 10 Ka to 4.57 Ga[7]

Potassium-calcium (K-Ca)
Applicable age range:

Radiocarbon (C-14) dating was invented by Willard Libby in 1946.
Half-life: 5,730 years,[6], [7], [9] 5,715 years[8]
Applicable age range: 100-50,000 years,[4] 1-70,000 years,[5] 100-70,000 years,[6] 100-60,000 years,[7] <55,000 years[9]

Rhenium-osmium (Re-Os)
Half-life: 42 billion[8]
Applicable age range:

Rubidium-strontium was invented in the 1930’s and 1940’s.[2]
Half-life: 47 Ga,[7] 48.8 billion[8]
Applicable age range: 10 Ma to 4.57 Ga[7]

Half-life: 106 billion[8]
Applicable age range:

Half-life: 14 billion[8]

Half-life: 75,400[8]

Half-life: 4.5 Ga,[7]
Applicable age range: 10,000-billion,[5] 1 Ma to 4.57 Ga[7]

Half-life: 4.5 billion[8]

Half-life: 0.7 billion[8]

Half-life: 248,000[8]
Applicable age range: 1,000-500,000[5]

Uranium-uranium (U-U)
Applicable age range:

Radiocarbon Dating

“Scientists have used carbon-14 dating to identify bottles of counterfeit Scotch Whisky, which, contrary to what their label says, were produced after the nuclear tests were conducted.”
Leman (2020)[9]


Accelerator Mass Spectrometer (AMS)


Beta Analytic Testing Laboratory:

Waikato Radiocarbon Dating Laboratory:

Last time I checked, the journal Radiocarbon listed 45 labs: They also had a link to what looked like hundreds of labs:


Radiocarbon, An International Journal of Cosmogenic Isotope Research:

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[1] –,4%20of%20the%20total%20K.. Accessed 29 August 2020.

[2] –,identified%20as%20the%20relevant%20radioisotope.&text=Otto%20Hahn%2C%20with%20E.,made%20by%20Hahn%20et%20al.. Accessed 29 August 2020.

[3] – Pomme, et al. “Is decay constant?” (April 2018). Accessed 1 Feb. 2021.

[4] – “Radiometric Age Dating” (October 3, 2018). Accessed 27 Feb. 2021.

[5] – Peppe, D. J. & Deino, A. L. (2013) Dating Rocks and Fossils Using Geologic Methods. Nature Education Knowledge 4(10):1. Accessed 27 Feb. 2021.

[6] – Prof. Stephen A. Nelson. “Radiometric Dating” (18-Apr-2012). Accessed 27 Feb. 2021.

[7] – Stephen Earle. “Physical Geography – Second Edition” (2019). Accessed 27 Feb. 2021.

[8] – Dr. Roger C. Wiens. “Radiometric Dating: A Christian Perspective” (2002). Accessed 27 Feb. 2021.

[9] – Jennifer Leman. “Murder! Espionage! Cosmic Rays! The History of Carbon-14 Is Way More Thrilling Than You Think” (25 Feb. 2020). Accessed 27 Feb. 2021.

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