LAF 101: Biotite Granite

Title: LAF 101: Biotite Granite
Description: MACROSCOPIC: Large anhedral crystals of Potassium Feldspar, Quartz, and Plagioclase Feldspar with some smaller crystals of Biotite.
MICROSCOPIC: Coarse grains of perthite consisting of Potassium Feldspar with Albite exsolutions along with coarse grains of Quartz and simple twinned Plagioclase Feldspar. Biotite is prominent throughout, along with smaller crystals of high birefringent Muscovite.
Source: Petrology Teaching Collection
Contributor: William DeBarba
Identifier: LAF-101
Mediator: Tamara Carley (carleyt@lafayette.edu
Rights Holder: Lafayette College Department of Geology and Environmental Geosciences

Media: https://exhibits.lafayette.edu/geology/files/original/4a4fd4e5941649c8b0d2020563fbe8c9.JPG; https://exhibits.lafayette.edu/geology/files/original/ee6f1f02b861eaa71c9eeb28606b602c.JPG; https://exhibits.lafayette.edu/geology/files/original/1d6f95314e23bf908247cc7060a67b40.JPG; https://exhibits.lafayette.edu/geology/files/original/c96748b7d4b06bdf89136eee01154975.JPG; https://exhibits.lafayette.edu/geology/files/original/8c6b3d4f4ebf5bcb10f1d8f98dfb93c1.jpeg; https://exhibits.lafayette.edu/geology/files/original/e939a3307f1b9ab9dcc792d5a273266d.jpeg; https://exhibits.lafayette.edu/geology/files/original/3c7d2677bee14c5488473ad01bc6a344.jpeg; https://exhibits.lafayette.edu/geology/files/original/39fac453520a975c17f5387f6ebfd197.jpeg