A successor to A Geologic Time Scale 1989 (Cambridge ... Veizer 10. Toward a 'natural' Precambrian time scale W. Bleeker 11. The Cambrian period J. H. Shergold and R. A. Cooper 12. The Ordovician ...

We will provide a list of web sites with relevant information. The geologic time scale is divided into eons, eras, periods, epochs, and ages. Our activities, and the time scale for download above, ...

The authors have been at the forefront of chronostratigraphic research and initiatives to create an international geologic time scale for many years, and the charts in this book present the most up to ...