| Quartz is the dominant mineral in veins in siliceous rocks, calcite in limestones, and gypsum in gypsiferous sediments. |
| They were laid in gypsiferous clay, a mass of which lay close to the southwest corner. |
| Wherever the gypsiferous marls of the Calchaqui are near the surface, the springs are saline. |
| The message in this Note is that reported values of exchangeable calcium for calcareous or gypsiferous soils are usually incorrect. |
| By this mechanism holes, commonly up to 20m deep and 40m or more across, continue to appear suddenly in gypsiferous terranes throughout the world. |
| This result is attributed to the connection of the lake with rocks of the gypsiferous series. |
