The collaboration with colleagues from abroad was subsequently fostered through several International Geological Correlation Programme
(IGCP) projects, notably 'Ecostratigraphy' (1983-1987) and 'Global Bioevents' (1984-1992), where Dimitri Kaljo was among the leaders and made the Palaeozoic succession of the Baltic region well known globally.
Among the scientific posts held not mentioned so far we find: Vice-president of the Geological Society of France, President of the International Subcommision of the Stratigraphy of the Triassic of the IUGS, Member of the Management Council of the UNESCO's International Geological Correlation Programme
, Board President of Madrid's Museo Nacional de Ciencias Naturales, etc.
Charles Gower of the Newfoundland and Labrador Geological Survey described how the International Geological Correlation Programme
(IGCP), has been active for over 30 years as a long-term, interdisciplinary, co-operative venture in the geological sciences between the International Union of Geological Sciences (IUGS) and the United Nations Educational, Scientific and Cultural Organization (UNESCO).