CONTENTS. 5 



CHAP. PAGE. 



X. The Cape Gray Promontory and Still well Island 144 



Description of Localities 1 44 



The Garnet Gneisses 146 



Cape Gray 146 



Garnet Point 147 



Cape Pigeon Rocks 151 



Stillwell Island 151 



Chemical Characters 152 



The Acid Hypersthenic Gneisses 154 



Stillwell Island 155 



Cape Pigeon Rocks 159 



Summary 1 04 



XI. The Cape Gray Metamorphosed Dyke Series 168 



Cape Gray 1 68 



Stillwell Island 171 



Cape Pigeon Rocks 177 



Garnet Island 181 



Chemical Characters 183 



Summary 186 



Correlation with other Areas 188 



XII. Relation between the Rocks at Cape Gray, Madigan Nunatak, and 



Aurora Peak 190 



The Charnockite Series of India 193 



Fermor's Hypothesis of an Infraplutonic Zone 198 



The Kodurite Series 198 



XIII. The General Problem of Transference of Material during Metamorphism 200 



Evidence of Migration in Geological Literature 200 



The Process of Migration 203 



Solution 203 



Solid Diffusion 204 



Force of Crystallisation 208 



X I V. Description of Plates 210 



General Index 221 



Number Index of Rock Specimens 229 



