Katz (2004) Journal of Structural Geology tell us that the structures were first reported by Cloos (1928)...and 'that' famous Riedel :-) Riedel, W., 1929. Zur Mechanik Geologischer Brucherscheinungen. Zentral-blatt fur Mineralogie, Geologie und Paleontologie B, 354–368. Best wishes Tiago ________________________________________ From: Tectonics & structural geology discussion list <[log in to unmask]> on behalf of Ben van der Pluijm <[log in to unmask]> Sent: 28 January 2016 18:31 To: [log in to unmask] Subject: Riedel Who is Riedel, from Riedel shears fame?