Definition of Trachyandesite. Meaning of Trachyandesite. Synonyms of Trachyandesite

- Trachyandesite is an extrusive igneous rock with a composition between trachyte and andesite. It has little or no free quartz, but is dominated by sodic...
- is intermediate in composition between basalt and andesite Basaltic trachyandesite – Naming system for volcanic rocksPages displaying short descriptions...
- Trachybasalt. S2 (Basaltic trachyandesite)—*Sodic and pot****ic variants are Mugearite and Shoshonite. S3 (Trachyandesite—*Sodic and pot****ic variants...
- basalt-trachybasalt-trachyandesite volcanoes (Ngorongoro also contains trachydacite) and the 1.6-1.5 Ma Oldeani basalt-trachyandesite volcano. The highlands...
- descended over steep slopes. Tambora has produced trachybasalt and trachyandesite rocks which are rich in pot****ium. The volcanics contain phenocrysts...
- rock. More specifically, it is a pot****ium-rich variety of basaltic trachyandesite, composed of olivine, augite and plagioclase phenocrysts in a groundm****...
- Huechulafquen. This cone has three craters. A tephra layer of black trachyandesite has been linked to Huanquihue and is dated 4028-4212 BP. Varve count...
- fields, such as the trachyandesite field, are further classified by the ratio of pot****ium to sodium (so that pot****ic trachyandesites are latites and sodic...
- million years ago in 5,000 years ago. The island consists primarily of trachyandesite rock. A major explosive eruption around 8000 BCE decapitated its top...
- mafic compositions. Typical intermediate rocks include andesite and trachyandesite among volcanic rocks and diorite and granodiorite among plutonic rocks...