Discovery of radioactive dating

We know that it is older than Christendom, but whether by a couple of years or a couple of centuries, or even by more than a millenium, we can do no more than guess." [Rasmus Nyerup, (Danish antiquarian), 1802 (in Trigger, 19)].

Nyerup's words illustrate poignantly the critical power and importance of dating; to order time.

Oakley (1979) suggested its development meant an almost complete re-writing of the evolution and cultural emergence of the human species.

Desmond Clark (1979) wrote that were it not for radiocarbon dating, "we would still be foundering in a sea of imprecisions sometime bred of inspired guesswork but more often of imaginative speculation" (Clark, 1979:7).

But annual sales before World War II (1939-45) amounted to no more than a few hundred metric tons of the metal and its compounds. Scientists discovered that one form of uranium will undergo nuclear fission.

Nuclear fission is the process in which the nuclei of large atoms break apart.

Games with manipulative or computer simulations should help them in getting the idea of how a constant proportional rate of decay is consistent with declining measures that only gradually approach zero.

The mathematics of inferring backwards from measurements to age is not appropriate for most students.

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The first lesson, Isotopes of Pennies, introduces the idea of isotopes.Classifying Reservoir Carbonates When the Status Quo Simply Does Not Work: A Case Study from the Cretaceous of the South Atlantic, Paul Wright and Andrew Barnett, #51419 (2017).Quantifying Architectural Controls on Reservoir Behavior in the Turonian Wall Creek Member of the Frontier Formation in the Powder River Basin, Wyoming, Nathan La Fontaine and Michael Hofmann, #51418 (2017).The Lower Montney Turbidite Complex of Northwest Alberta and Northeast British Columbia: Evolution of an Oil and Gas Play From Conventional to Unconventional, Richard Sereda, #10987 (2017).Update of Horizontal Plays in Wyoming, Andrew Finley, #10980 (2017).Uranium occurs near the beginning of the actinide family.

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