Deformation Mechanisms, Rheology and Tectonics. Special publication / Механика деформация, реология и тектоника. Специальный выпуск

It is my great pleasure to introduce this volume dedicated to my long-standing colleague and friend, Henk Zwart; the more so since I missed the opportunity of addressing him on the occasion of his retirement from the chair of structural and applied geology in the State University at Utrecht in 1988.Hendrik Jan Zwart enrolled as a student of geology in the State University at Leiden in 1946. In my welcome speech as chairman of the student's geology club at that time I included him among the 'rolling stones of the post-war basal conglomerate' of enrollment, and I must admit that he has never gathered any moss!
Although initially absorbed by Quaternary geology, Henk opted for structural geology at a later stage taking his MSc and PhD with L. U. de Sitter as supervisor. At that time the stamping ground of de Sitter was located in the soft-rock sector of the central Pyrenees, but Henk managed to persuade de Sitter (no mean task anyway!) to let him study the crystalline basement of the Saint Barthelemy Massif for his dissertation <...>