Basaltandesite
Basaltic andesite in the Cascade Mountains
Basaltandesite (also basaltic andesite ) is a volcanic rock from the andesite family .
composition
In the black base there are visible crystals of plagioclase , olivine and augite . In the TAS diagram , it is located in field O1, and with a proportion of 52 to 57 wt% SiO 2 belongs to the intermediate rocks .
Occurrence
- Hegau or on Donnersberg in Germany
- Volcán de Agua in Guatemala
- Mount Shasta , Three Sisters in the Cascade Mountains on the west coast of the USA
- Dekkan Trapp in India
See also
literature
- Roger Walter Le Maitre (Ed.): Igneous Rocks. A Classification and Glossary of Terms . Cambridge University Press, Cambridge 2002, ISBN 0-521-61948-3 .