gsminmag Clay Minerals Clay Minerals 0009-8558 Mineralogical Society 10.1180/minmag.1975.040.310.25 Book Reviews The Alkaline Rocks Mackenzie W. S 6 1975 40 310 217 218 Sørensen H. The Alkaline Rocks 1974 London and New York Wiley-Interscience xii+622 pp., 137 figs., I pl., 31 geol. sketch-maps, Price £20·00 ($34-95) Copyright © 1975, The Mineralogical Society 1975