International Geological Congress. International Geological Congress Internatonal Cological Congress 24th international geological congress.Abstracts International Geological Congress.24th,Montreal,1972 International Geological Congress,25th,Sydney,1976 International Geological Congress,26th,paris,1980. 24th International Geological Congress.Sections 4 International Geological Congress(27th:1884:Moscow) International Geological Congress(25th:1976:Sydney)