Version 3.0 New version by Cédric Gouard. Please cite as: Iacovino, Kayla, Gouard, Cédric, & Fernandez, Crescencio. Versión en español del trazador de diagramas TAS traducido del inglés por Crescencio Fernandez H. Please cite as: Iacovino, Kayla, & Gouard, Cédric. Created using coordinates as given in Le Maitre et al (2002). If you have a question about any of these tools, feel free to reach out via email at kayla iacovino nasa gov Spreadsheets, Calculators, and Python CodeĮxcel spreadsheet that allows for fast plotting onto a TAS (total alkali silica) diagram for use in naming your volcanic rock by composition. I do regularly update this page when I find or develop new tools, but I don’t often check the comments posted here. Hello! I’m glad these tools continue to be a useful resource for so many.