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Dear Andrea, Damien Delvaux's Wintensor software is able to produce "Twiss-type" tangent lineation diagrams: http://www.damiendelvaux.be/Tensor/WinTensor/win-tensor.html Remember that Twiss' tangent lineation diagrams portray the relative slip sense of the footwall fault block. A variation of the tangent lineation diagram sensu Twiss was developed by R. Hoeppener in the 1950ies in Germany*. In contrast to the "Twiss method", Hoeppener plotted the movement direction of the hanging wall block. TectonicsFP (http://tectonicsfp.com) allows you to plot fault-striae pairs and switch quickly between "Angelier plots" (i.e., fault-slip pair shown as a great circle with its fault striae) and the Hoeppener tangent lineation (showing the motion of the hangingwall block). I personally prefer Hoeppener-type diagrams over Twiss' tangent lineation diagrams, because they are consistent with "Angelier-type" diagrams in the sense that they both portray the relative motion of the hangingwall fault block. Best wishes, Kamil *) Hoeppener, R. (1955), Tektonik im Schiefergebirge, Geologische Rundschau, 44(1), 26-58. ______________________________________ Kamil Ustaszewski Head of Structural Geology Institute of Geological Sciences Friedrich-Schiller University Jena ______________________________________ Tel. +49(0)3641-948623 e-mail: [log in to unmask] WWW: http://www.structures.uni-jena.de Burgweg 11 — office H106 D-07749 Jena, Germany On Jul 27, 2015, at 13:42 , Andrea Billi <[log in to unmask]> wrote: > Dear All, > > do you know where I can find a software able to produce tangent lineation diagrams (Twiss and Moores, Structural Geology 2nd ed., 2007, page 437)? > > thanks a lot > Andrea > > _________________________________________________ > Andrea Billi (PhD) > Consiglio Nazionale delle Ricerche, IGAG, > c.o. Dipartimento Scienze della Terra, > Sapienza Università di Roma, > P.le A. Moro 5, 00185, Rome, Italy. > > Phone: +39 06-49914955 > Skype: a.billi > Email: [log in to unmask] > Web site: http://www.andreabilli.com > Photos: https://www.flickr.com/photos/andreabilli68/ > _________________________________________________ > > Dalla Costituzione della Repubblica Italiana > Art. 9: "La Repubblica promuove lo sviluppo della cultura > e la ricerca scientifica e tecnica." > Art. 33: "L'arte e la scienza sono libere e libero ne è > l'insegnamento." > > "Non è grave il clamore chiassoso dei violenti, bensì il silenzio spaventoso delle persone oneste." Martin Luther King > > > > ---------------------------------------------------------------- > This message was sent using IMP, the Internet Messaging Program.