pulaskite

English

Noun

pulaskite (countable and uncountable, plural pulaskites)

1. (mineralogy) A massive course-grained rock composed chiefly of feldspar with some other minerals such as hornblende and biotite.
   • 1909, Samuel James Shand, Royal Scottish Museum, An Introduction to Petrography and Guide to the Collections of Rocks, page 45:

     The pulaskites occupy a position similar to that of larvikite between syenite and nepheline-syenite. Quartz is absent, while felspathoids are present in small quantities.

   • 1920, Alfred Reginald Schultz, Oil Possibilities in and Around Baxter Basin, in the Rock Springs Uplift, Sweetwater County, Wyoming, page 93:

     The normal granite nowhere cuts the normal pulaskite, nor does the pulaskite cut the granite. That the two rocks are transitional is clearly shown in some places.

   • 1977, Québec (Province). Dept. of Natural Resources, Special Paper (issues 28-29, page 55)

     Nepheline and sodalite are two accessory minerals in the pulaskites.

Derived terms

• pulaskitic