Absolute Dating. A.D. is used when geologists want to know the actual numerical age of a rock layer. A.D. is used when geologists want to know the actual.
A.C.E. Biology Spring 2011 Chapter 2: Basic Chemistry.
Applications of Modern Data Collection and Modelling Techniques to Biogeochemistry GGR 403S Eugene Kwan March 2004.
A Fossil. Any method of measuring the age of an event or object in years.
Topic 7.2 The ABC’s of Radioactivity Types of Nuclear Decay.
