﻿process-blocks and other illustrative eigeres. xi 



Page 



Fig. 1. Geological map of the Lugar district 86 



2. Section across the Glenmuir Water 90 



3. Geological map and section of a part of the Lugar Sill 94 



4. Vertical section of the Lugar Sill 96 



5. Diagram illustrating mineralogical variation concurrent with 



increasing depth in the sill 116 



6. Diagram illustrating variations in chemical composition in 



the Lugar sill 119 



1. Generalized section across the Rhinns of Islay 136 



2. Section across Colonsay 136 



3. Map illustrating the suggested continuation of the Great Glen 



Fault across Islay 138 



4. Cliff-section on the north-western coast of Eileach-an- 



Naoimh (Garvellach) 146 



5. Section from Portaskaig to the northern coast of Islay 148 



6. Cliff-section on the southern coast of Islay 154 



1-3. Branching and blind veins [of pseudotachylyte] near the boat- 

 house [Parijs] 201 



4-6. Veins of pseudotachylyte and pegmatite, ibid 202 



7 & 8. Veins of pseudotachylyte below the bridge, ibid 203 



9-12. Veins of pseudotachylyte, ibid 204 



13. Pseudotachylyte 200 yards above the boathouse, ibid 205 



1. Map illustrating the distribution of the volcanic rocks of 



Mozambique 226 



2. Section from the Mitikiti River to Mosuril Bay 227 



3. Section from Ibrahimo to Conducia Bay 227 



4. Specimen of amygdaloidal basalt from the Sanhuti-River 



district 229 



5. Sketch of the Mochelia Dyke penetrating Tertiary sand- 



stones , 230 



6 & 7. Variation-diagrams of the Tertiary volcanic rocks of Mozam- 

 bique 266-67 



8. Variation-diagrams of the post-Cretaceous volcanic rocks of 

 Abyssinia, British East Africa, Mozambique, Reunion, and 

 Teneriffe 268-69 



