Define electron spin resonance dating technique
The species was named Orrorin tugenensis after the location. One advantage of the carbon method, which was one of the first radiometric dating methods developed, is that only a handful of charcoal, burned bone, shell, hair, wood, or other organic substance is required for laboratory analysis.
The Australopithecus sediba skull has several derived features, such as relatively small premolars and molars, and facial features that are more similar to those in Homo.
The method can be used to accurately date rocks that were formed as early as 20, years and as far back as 5, years, as long as the rocks were not heated to Celsius in the interim, as this is the temperature where argon will begin to leak.
In addition, any argon that existed prior to the last time the rock was molten will have been driven off by the intense heat.