| Geochemical variation is common in deposits of many rhyolitic eruptions, especially those from large, caldera-forming events in continental settings. |
| It was characterized by rhyolitic volcanism which appears to have been restricted to the Horn Graben area. |
| Then came the period of rhyolitic flows, the centers of volcanic activity being as before Mts. |
| The injection of a mafic magma into a more silicic magma chamber is an important trigger mechanism in moderate-sized andesitic, dacitic and rhyolitic eruptions. |
| To calibrate major elements, two peralkaline rhyolitic glasses were used. |
| Both were formed in rhyolitic alluvium and tephra, and had different particle size distributions and different specific surface areas. |
