He was employed at Caltech's Division of Geological & Planetary Sciences at the time of writing the first edition.
He is presently employed in the Space & Atmospheric Sciences Group at the Los Alamos National Laboratory.
Some paleontologists study the ecology of the past; others work on the evolution of fossil taxa.
For additional information on the subdisciplines of paleontology, read our "What is paleontology? Archaeologists primarily work with human artifacts objects that have been made by humans and with human remains.
Radiometric dating--the process of determining the age of rocks from the decay of their radioactive elements--has been in widespread use for over half a century.
You may find it useful for the clear definitions, and for excellent links on a variety of topic.
Archaeological geology as a science had to precede the proposal of evolution, as an understanding of the immense age of the earth is necessary to understand evolution.
Cuvier established amongst the scientific community the fact of extinction.
Wiens has a Ph D in Physics, with a minor in Geology.
His Ph D thesis was on isotope ratios in meteorites, including surface exposure dating.