Errors in radiometric dating how do singles get dating confidence

Another example of Woodmorappe exaggerating trivial errors in radiometric dating can be seen in his use (1999, p. they did extensive argon-argon analyses that contradict Dalrymple's conclusions about the alterations of the trap rock.

Thorium dating will almost always yield different ages for the same rock than other radiometric dating techniques.

41, 52) is misleading us into believing that these errors are huge and fatal to radiometric dating! (1964), which had been used to calibrate the Eocene-Oligocene boundary of the geologic time scale, were later shown to be "unreliable": “When Carl Swisher of the Institute of Human Origins in Berkeley began to redate the Flagstaff Rim ashes in 1989, he discovered something shocking.

Many of the K-Ar dates first run by Jack Evernden and Garniss Curtis in 1963 were drawn from contaminated samples. 1964) had served as the basis for dating the North American mammalian chronology for over a quarter century, and everyone relied on them ...”At face value, this quotation appears to be very bad news for the 1964 K-Ar dates and the ability to date the Eocene-Oligocene boundary. Sampson, 1999, "U-Pb Geochronology, Geochemistry, and Provenance of the Grenvillian Huiznopala Gneiss of Eastern Mexico," Muecke, G.

Vast differences in ages were recorded for the same rocks.

In the nine papers, Lunar Sample # 10017 was reported to have 19 different ages.

Flagstaff Rim Ash J, for example, had been K-Ar dated at 32.5 million years, but laser-fusion 40Ar/39Ar methods gave a date of 34.4 ...[reference to figure omitted].”Clearly, this discrepancy is a serious challenge for geologists that want high resolution (less than 1% error) in the geologic time scale. In another attempt to undermine radiometric dating, Woodmorappe (1999, p. 27-28), where Dalrymple, Renne and other scientists "cannot agree" about which dates are "real" and which are "spurious" for some Siberian basalts and associated rocks:"Over time, Dalrymple concludes, some of the argon-40 had leaked out of the trap's rocks, making them look 1 or 2 million years younger than they are.