NAGT > Teaching Resources > Rock and Mineral Exchange > Intermediate Volcanics

Intermediate Volcanics

Steve Dunn, Mount Holyoke College

Description of Available Specimens

I needs samples of intermediate volcanic and plutonic rocks.


I have samples I can send in trade:
Gassetts schist, VT (sta-gar-bi mu schist +/- ky); Pinney Hollow fm, VT (clt-chl-mu phyllite); Holyoke basalt (aphyric, holocrystalline); pebbly arkose of Mt Toby and/or Sugarloaf fm; Cape Ann granite (A-type, generally peralkaline, perthite granite), gabbro (Grenville-age), msv magnetite/ilm, diop marble, and more...