In the case of nearly all branches of science a great advance was made when accurate quantitative methods were used of more qualitative. One great advantage of this is that it necessitates more accurate thought, points out what remains to be learned, and sometimes small residual quantities, which otherwise would escape attention, indicate important facts.

CD-ROM contains the programs described v. 3 and listed in the appendices of the sessions.

CD-ROM contains the programs described v. 3 and listed in the appendices of the sessions.

The trend towards a more quantitative approach in structural geology has stimulated the development of a number of techniques for determining the strain in deformed rocks of which the most widely used is one called the Rf/&fgr; method. With more than 100 applications of the technique published in the literature this is a timely work, describing as it does the practicalities of the method and its recent refinements. The comprehensive collection of standard graphs, indispensable for the determination of the strain, has never previously been widely available.