umptekite
English
Noun
umptekite (countable and uncountable, plural umptekites)
- (mineralogy) This term needs a definition. Please help out and add a definition, then remove the text
{{rfdef}}.- 1905, John Henry Sears, Essex Institute, The Physical Geography, Geology, Mineralogy and Paleontology of Essex County, Massachusetts (page 213)
- The rock-mass in which this umptekite form of hornblende occurs may therefore be called umptekite gabbro.
- 1920, Alfred Reginald Schultz, Oil Possibilities in and Around Baxter Basin (page 85)
- The Beverly syenite includes the alkaline syenites of Beverly, Manchester, Salem, and Marblehead, comprising pulaskites and umptekites.
- 1956, The Quarterly Journal of the Geological Society of London (page 210)
- There Strauss & Truter record a gradual transition from the white umptekite (fenite) to a pulaskitic rock with nepheline.
References
- Mindat.org, Hudson Institute of Mineralogy, 2000–2022.