Porter GeoConsultancy Pty Ltd (PGC) provides access to this database at no charge.   It is based on material prepared for the PGC International Study Tour series, papers entered to the PGC Literature Service and PGC publications.   It was current when sources/papers consulted were published.   While we endeavour to ensure the information was accurate at the time of compilation, PGC takes no responsibility what-so-ever for inaccurate or out of date data, information or interpretations. ......... MORE