A minimum age of emplacement for the Tower Hill Granite is given by an Rb-Sr muscovite isochron
date of 401 [+ or -] 4 Ma (Whalen et al.
age was calculated with the ISOPLOT program (Ludwing, 1998).
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.
41 Weighted Mean Analysis Isochron
Analysis Sample Age (Ma) N [sup.
and it is possible to plot an isochron
line with B to F data yielding an age of 55.
1992): "Uranium-series Isochron
Dating at El Castillo Cave (Cantabria, Spain): The Acheulean/Mousterian question", Journal of Archaeological Science, vol.
age for amphibolites of the ophiolitic complexes of the Appalachians of Quebec.
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.
North Dakota, yielded a Re-Os isochron
age of 354 [+ or -] 49 Ma ([lambda] = 1.
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.
U-series dating of impure carbonates: an isochron
technique using total-sample dissolution.