This geologic map of the southern Swiss Alps is modified from Tromsdorff and Connolly (1996, Fig.2). Tick marks are Swiss Grid (CH1903). Mouseover any map unit to see a brief description. Click the "Assemblages" checkbox below the map to show polygon dots with locations of mineral pairs shown on the Tromsdorff and Connolly map. Click the "Isograd" checkbox below the map to show two isograds drawn by Tromsdorff and Connolly.
Based on the assemblages reported on the map and on the T-P diagram on the previous page, identify the chemical reactions that are represented by the two isograds. Check the box for the reaction that is your answer and click "Submit." Be sure to check only one box.
West Isograd: Yes! No. Try again.
East Isograd: Yes! No. Try again.
Click the "Samples" checkbox. Match each red sample dot with a cmSerpentinite sample that has a mineral assemblage that matches the assemblage and isograd information reported by Tromsdorff and Connolly. Use the pulldown lists to choose a cmSerpentinite rock sample that is appropriate for the Map Sample location. To help make your selections, you may wish to return to the previous page, which shows mineral assemblages and reactions, by using the "Previous Page" button in the Header Bar. Unfortunately, this page will not remember your sample selections.
