gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1986.050.356.26 Short Communications Discussion and Comments on the Paper: Electron-Optical Studies of Phyllosilicate Intergrowths in Sedimentary and Metamorphic Rocks Morad S. Aldahan A.A. Department of Mineralogy and Petrology, Institute of Geology, Uppsala University, Box 555, S-75122 Uppsala, Sweden 6 1986 50 356 340 343 13 7 1985 28 11 1985 Copyright © 1986, The Mineralogical Society 1986 phyllosilicates biotites Brottum Formation Norway metamorphic rocks sedimentary rocks