isochron

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isochron

(ˈaɪsəʊˌkrɒn)
n
1. (Geological Science) a line on an isotope ratio diagram denoting a suite of rock or mineral samples all formed at the same time. The slope of the line is related to the age of the rock or mineral suite
2. (Geological Science) a line or curve on a geological map or cross section (esp of oceanic crust) connecting points of identical age
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A plate tectonic model for the Paleozoic and Mesozoic constrained by dynamic plate boundaries and restored synthetic oceanic isochrons.
Our data from various layers of Bilong Co oil shale do not define isochrons.
Nevertheless, our data from various layer oil shale do not define isochrons, which is true of the Belong Co oil shale, and also of the Shenglihe oil shale.
they fail to explain why there are so many cases where there is good concordance of isochrons .
We believe the rate of helium diffusion from zircons, the presence of polonium radiohalos near uranium radiohalos in granite, the discordance of isochron dates among multiple conventional dating methods, and the presence of measurable concentrations of carbon-14 in coal and diamonds as explicated in our book provide strong evidence for a young earth.
2002): A plate tectonic model for the Paleozoic and Mesozoic constrained by dynamic plate boundaries and restored synthetic oceanic isochrons.
use stable isotope data to demonstrate the importance of evaluating chemical and isotopic equilibrium in the interpretation of isotopic mineral isochrons.
Consider Figure 4, a set of isochrons from TDOA and a set of isofreqs from FDOA calculated for a single baseline of two receivers.
Rb/Sr isochrons of Precambrian age from plutonic rocks in the Cobequid Highlands, Nova Scotia.
In November 1997 the Geographical Journal, published by the Royal Geographical Society (with IBG), carried a feature assessing the pros and cons of these claims, along with weighty assessments of sunrise isochrons, declinations and complex equations to pinpoint the place where the sun first peeps over the horizon.
Yet they fail to explain why there are so many cases where there is good concordance of isochrons, something which would never happen if radioisotopic dating were not valid.
Internal or mineral isochrons are constructed from isotopic analyses of individual minerals that have been extracted from a single large rock sample.