The lunar studies of Tera and Wasserburg introduced a coupled evolution diagram for this system.
The lunar studies of Tera and Wasserburg introduced a coupled evolution diagram for this system. An abundance constant of one over 137.88 allows one to separately compare two components of this system to a reference. This system can be used with samples that have undergone metamictization by chemically abrading them. A locus of concordant coordinates on a concordia diagram is an essential part of using this system. Zircon is particularly awesome when using this system because it concentrates the actinide component of this system while excluding the carbon group component of this system. For 10 points, radiometric dating spanning one million years to billions of years is possible using what system, named for the two elements it uses, with isotopes of 235 or 238 and 206 or 207.
The lunar studies of Tera and Wasserburg introduced a coupled evolution diagram for this system.
uraniumÂ–thoriumÂ–lead dating [or UÂ–ThÂ–Pb dating; prompt on dating] 