Institution: | (1) Union Oil Company of Canada, Calgary, Alberta, Canada;(2) Gewerkschaften Brigitta und Elwerath Erdgas Erdöl, Hannover, FRD;(3) Istituto di Mineralogia, Milano, Italy;(4) Department of Geology, University of British Columbia, Vancouver, B.C., Canada;(5) Department of Geology, University of Leicester, Leicester, England, UK;(6) Department of Geology, Syracuse University, Syracuse, New York, USA |