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"Everything which has come down to us from heathendom is wrapped in a thick fog; it belongs to a space of time we cannot measure.

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Potassium (K) is one of the most abundant elements in the Earth's crust (2.4% by mass).

One out of every 10,000 Potassium atoms is radioactive Potassium-40 (K-40).

In the past ten years I've fixed mass spectrometers, blasted sapphires with a laser beam, explored for uranium in a nature reserve, and measured growth patterns in fish ears, and helped design the next generation of the world's most advanced ion probe.

My main interest is in-situ mass spectrometry, but I have a soft spot in my heart for thermodynamics, drillers, and cosmochemistry.

Etna basalt, Sicily (May 1964) 0.7±0.01 Ma Medicine Lake Highlands obsidian, Glass Mountains, California ( in the 1800-1801 Hualalai flow, Hawaii, resided in fluid and gaseous inclusions in olivine, plagioclase, and pyroxene in ultramafic xenoliths in the basalt, and was sufficient to yield "ages" of 2.6 Ma to 2960 Ma.

Further confirmation comes from diamonds, which form in the mantle and are carried by explosive volcanism into the upper crust and to the surface. obtained a K-Ar isochron "age" of 6.0±0.3 Ga for 10 Zaire diamonds, it was obvious excess was inherited from the mantle source areas of the magmas. Snelling, "Discordant Potassium-Argon Model and Isochron ' Ages' for Cardenas Basalt (Middle Proterozoic) and Associated Diabase of Eastern Grand Canyon, Arizona," in R. The potassium-argon age of some meteorites is as old as 4,500,000,000 years, and volcanic rocks as young as 20,000 years old have been measured by this method.Welcome to the K12 section of the Radiocarbon WEBinfo site.A method designed to avoid such complexities was introduced by American geochronologist Craig M.Merrihue and English geochronologist Grenville Turner in 1966.reaches millions of people each year–many of these aren't believers in our Creator and Savior Jesus Christ.

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