By Prof. Paul Edwin Potter, Prof. Francis J Pettijohn (auth.)

The research of paleocurrents, considering the fact that 1963, is now a truly regimen a part of sedimentology, and a growing number of such stories are discovering use in different fields. hence it appeared acceptable for us to study post-1963 advancements and current them in a compact demeanour for the reader. rather than rewriting a moment version, which 13 years later we might set up in a totally dif­ ferent manner, we have now introduced every one bankruptcy brand new with new fabric as much as 1976. a brand new replace complement has during this variation been inserted after each of the unique chapters. now we have stayed just about the unique topic of paleocurrents-how to degree them and the way to exploit them to unravel geological difficulties ranging in scale from the hand specimen to the sedimentary basin and past. we now have used many annotated references and tables to aid pre­ despatched this knowledge to the reader. The reader will notice that we have got mentioned a couple of 1962 references - courses that seemed too overdue to be mentioned within the unique 1963 variation. once or twice we've got additionally stated a reference which was once integrated within the first version. those are marked with an asterisk and for that reason don't look within the new lists of references. we have now been aided by means of many. In Cincinnati, WANDA OSBORNE and JEAN CARROL did typing and RICHARD SPOHN, the University's geological librarian, was once very beneficial in acquiring many references to the literature.