The Magmatic Origin and Evolution of the Oxnadalur Volcanic Complex in Northern Iceland
The 8-9 million year old volcanic complex of Oxnadalur is host to large-volume basalt flows, small and large volume rhyolite ash and lava flows, and a gabbroic intrusion. Both the plagioclase and pyroxene phenocrysts of the basalt are larger in size in the younger flows. The rhyolite ashes contain...
| Main Author: | |
|---|---|
| Format: | Others |
| Published: |
ScholarWorks@UMass Amherst
2010
|
| Subjects: | |
| Online Access: | https://scholarworks.umass.edu/theses/502 https://scholarworks.umass.edu/cgi/viewcontent.cgi?article=1599&context=theses |