CONTRIBUTIONS TO THE GEOLOGY OF BENGUELLA. 



535 



Fig. 2. Oendolongo Quartzite. Hill west of Senhor Pire's at Babaera. With authigenous muscovite (m). 

 (Crossed Nicols.) (No. 241.) 



Fig. 3. Epidotic Quartzite. East of Lepi. The dark granules are mainly epidote. (No. 135.) 



Fig. 4. Micaceous Schistose Quartzite with interlocking grains. Bailundo Series. West bank of Lovule 

 River, east of Catotlo. (Crossed Nicols.) (No. 161.) 



Fig. 5. Schistose Quartzite. Bailundo Series. Ambussa Hills, near old stone fort. (Crossed Nicols.) 

 (No. 149.) 



Fig. 6. Sillimanite Schist. Bailundo Series. South-east of first camp, about ten miles north-east of 

 Bailundo. (No. 158.) 



All x 24 diameter. 



EXPLANATION OF ILLUSTRATIONS IN TEXT. 



Fig. 1. Geological section along the Benguella Railway from Lobito Bay to Candumbo. The hills 

 outlined in broken lines are situated south of the railway. (Scale: Vertical, 1" = 30 miles; 

 horizontal, 1" = about 30 miles.) 



Cretaceous and alluvium. 



CC 



o o 

 o o O 



Sandstones at Culimahala (age undetermined). 

 Oendolongo Series. 



K^S^nJ Lepi graywackes 

 "\X | Gneiss. 



j /\ /\ I Granite, etc. 



i 



Dolerite. 



Fig. 2. Section across the Cretaceous beds south-east of Lobito Bay. (Scale: Vertical, 1 " = 1000 feet; 



horizontal, 1"= 1 mile.) 



i = inflata beds. 



a = Algal limestone. 



* = False-bedded inflata beds. 

 Fig. 3. Section along the Hanha River. (Scale as in fig. 2.) 



c = Astroccenia bed. 



a = Algal limestone. 

 Boulder bed. 



I Gneiss. 

 Fig. 4. — The sandstone above the gneiss at the head of the Lengwe Gorge. 

 Fig. 5. Section across the Oendolongo Mountains and through the Quingenge Agricultural Station to the 



Cuiva River. (Scale: Vertical, 1"= 2000 feet; horizontal, 1" = 2 miles.) 



s = Sandstone. 



r = Rhyolite. 



t = Tuffs. 

 Q = Quartzite. 

 A = Fine-grained granite. 

 A = Coarse-grained granite. 

 TRANS. ROY. SOC. EDIN., VOL. LI, PART III (NO. 13). 77 



