Geological Association of Canada http://www.esd.mun.ca/~gac/
A national geoscience society, publisher and distributor of quality geoscience publications and journals, including Geoscience Canada, GEOLOG, Geotext, and Palaeontographica Canadiana.
Geologists' Association http://www.geologist.demon.co.uk/
Promotes the study of geology by both professionals and amateurs through a range of activities, including publications, lecture meetings, and field trips both within the UK and abroad.
International Union of Geological Sciences (IUGS) http://www.iugs.org/
Non-governmental scientific organization which promotes and supports the study of geological problems of world-wide significance, and facilitates international and interdisciplinary cooperation in the earth sciences.