a rare plagioclase found in alkaline igneous rocks
Examples of 'bytownite' in a sentence
bytownite
In most of this anorthosite, andesine megacrysts with bytownite inclusions are embedded in a fine-grained groundmass of bytownite or anorthite.
A. Hietanen 1986, 'Role of replacement in the genesis of anorthosite in the Boehls Butte area, Idaho',Bulletin of the Geological Society of Finlandhttp://www.geologinenseura.fi/bulletin/Volume58/sgs_bt_058_1_pages_071_079.pdf. Retrieved from DOAJ CC BY 4.0 (https://creativecommons.org/licenses/by-sa/4.0/legalcode)