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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In the present study, we use KOT as a time marker, or isochron, to quantify long-term soil erosion by comparing differences in KOT depth and concentration between the study plots.
II, 2008, An isochron method for cosmogenic nuclide dating of buried soils and sediments: American Journal of Science, v.
Such a scenario would explain the very low strontium isotope values, high strontium concentrations, low Sr/Ca, and also the Rb-Sr isochron (Douglas et al.
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.
North Dakota, yielded a Re-Os isochron age of 354 [+ or -] 49 Ma ([lambda] = 1.
Within the context of Kirchhoff migration, this stretch is associated to the variation in the curvature of isochron surfaces for different times on an input seismic trace (Figure 1).
Subsequently, they used spatial interpolation methods to generate isochron maps that plotted the mean rates of spread of farming (and of the disappearance of hunting and gathering) in two dimensions (Ammerman & Cavalli-Sforza 1984).
According to Jim Munnell, vice president of sales and customer operations for Isochron, the desire for "instant gratification" is a big inhibitor to success.
Available geophysical data suggest that the Newfoundland Basin contains a zone approximately 150 kilometers wide of thinned continental crust separating known Grand Banks continental crust from known oceanic crust seaward of a mid-Cretaceous period (about 118 million years ago) isochron, a magnetic anomaly known as MO.
Anns Leucogranite has yielded a younger, Cambrian age using the Rb-Sr isochron method (Cormier 1980) and may represent a later phase of plutonism.