Dating meteorites age earth Sauth america xxx
The Talmudic rabbis, Martin Luther and others used the biblical account to extrapolate back from known history and came up with rather similar estimates for when the earth came into being.
The most famous came in 1654, when Archbishop James Ussher of Ireland offered the date of 4004 B. Within decades observation began overtaking such thinking.
He was one of the dominant physicists of his time, the Age of Steam.
His achievements ran from helping formulate the laws of thermodynamics to advising on the first transatlantic telegraph cable. Shelton was a philosopher of science, critical (as shown in his contribution, the 1915 article “Sea-Salt and Geologic Time”) of loose thinking and a defender of evolution in debates.
Having come that far, they were initially quite reluctant to accept a further expansion of the geologic timescale by a factor of 10 or more.
And we should resist the temptation to blame them for their resistance. Different methods of measurement (such as the decay of uranium to helium versus its decay to lead) sometimes gave discordant values, and almost a decade passed between the first use of radiometric dating and the discovery of isotopes, let alone the working out of the three separate major decay chains in nature.
One outstanding feature of this drama is the role played by those who themselves were not, or not exclusively, geologists.
The third act sees the entry of a newly discovered set of physical laws—those governing radioactivity.Robert Hooke, not long after, suggested that the fossil record would form the basis for a chronology that would “far antedate ...even the very pyramids.” The 18th century saw the spread of canal building, which led to the discovery of strata correlated over great distances, and James Hutton’s recognition that unconformities between successive layers implied that deposition had been interrupted by enormously long periods of tilt and erosion.We, of course, know the final outcome, but we should not let that influence our appreciation of the story as it unfolds.Even less should we let that knowledge influence our judgment of the players, acting as they did in their own time, constrained by the concepts and data then available.
The second depended on highly dubious theories of formation of the earth and moon and plays relatively little role in this compilation.