Origins of Igneous Layering

Abstract 1 1 • Introduction 1 1. 1 The agpaitic rocks of the Ilimaussaq intrusion 3 2. 1 General relationships 43 5. 2 Granular syenites 43 5. 1 Structure and cryptic variation 43 5. 2 Origin of granular layers 46 5. 3 Trace elements and chamber dlinensions 47 5. 3 Laminated syenites 48 5. 1 General features 48 5. 2 Mineral layering 51 5.