pulaskite

plural pulaskites

1. countableuncountablechemistryA massive course-grained rock composed chiefly of feldspar with some other minerals such as hornblende and biotite.

   Nepheline and sodalite are two accessory minerals in the pulaskites.

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

   2 more examples

   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.

   1909, Samuel James Shand, Royal Scottish Museum, An Introduction to Petrography and Guide to the Collections of Rocks, page 45

   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.

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