Put another way, no nation can afford to pay for the most expensive features of both the blue - collar, industrial age model and the modern, professional model. (ncee.org)
Their new method allows them to extract rates of change from a sediment record without the need for an actual sediment age model. (sciencedaily.com)
If you consider the existing uncertainties in dating and simple linear age model, we could get some strong leads. (notrickszone.com)