For those who are interested in learning more about palaeomagnetism Robert Butler's book, "Paleomagnetism: Magnetic Domains to Geologic Terranes", is now available on this site.  They are posted as PDF files for which you will need Acrobat Reader (obtainable here).  To read or download any of the chapters just click on the links below. 

Preface & Table of Contents
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Chapter 9
Chapter 10
Chapter 11
Appendix.
 

Thanks to Robert Butler for permission to post the book here, and to Norm Meader for his assistance.