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 such cases, the phase should be undefined (unless a broader definition of phase is adopted based on isochrones; see below).
(2002): A plate tectonic model for the Palaeozoic and Mesozoic constrained by dynamic plate boundaries and restored synthetic oceanic isochrones. Earth and Planetary Science Letters 196, 17-33.
Variable isochrones for estimating runoff based on digital stream networks.
Figure 6 also shows the magnetic isochrones obtained by Rappaport et al.
In order to avoid the exaggerate loss of time and assure the efficiency of mobility we should assure the isochrones (the limits when the transport from the domicile to the working place is registered in the interval of 30-45 minutes).
The first ten townships which have registered a significant percentage of demographical growth are located within the 15 minute isochrones (Fig.
The mean stellar lifetimes are taken from the isochrones from the Padova group [86-89] instead of using those from the Geneva group Schaller et al.
The color scale shows hole drift speeds, in mm/ns, the black lines show charge drift trajectories, and the light grey lines show "isochrones"-loci of equal hole drift time for events in the detector bulk.