11 



CONTENTS. 



(bb) The Lower Miocene or Prome Stage 



(a) Lithological characters • 



(b) Palseontological characters 



(c) The occurrence of petroleum 

 Stratigraphy ...... 



A. General Features .... 



(a) Unequality of sedimentation • 



(b) Veins of eruptive mud . . 



(c) The anticlinal and dome-like structure 



(aa) The anticlinal arch • 



(bb) The longitudinal arch 



B. Superficial sections 



C. The sections of the drilled wells 



D. The original sedimentation of the petroli 



ferous beds .... 



E. General conclusions, and further prospect 



of the Yenangyoung Oil-field 



(a) The native reserves • 



(b) The area exploited by drilled wells 



61 

 61 



62 



63 

 77—123 



77 

 77 

 80 

 86 



86 

 87 

 89 

 9i 



in 



"5 

 116 



123 



Chapter V.— THE OCCURRENCE OF PETROLEUM 



NEAR 'YENANGYAT 124—137 



1. Geographical Position, Area and Physical 



Geography ...... 124 



2. Geological Features . . . • • 126 



A. The Pliocene or Irrawaddi Series • • 126 



B. The Miocene or Pegu Series . . . 126 



(aa) The Upper Miocene or Yenan- 



gyoung Stage . • . . 126 



(bb) The Lower Miocene or Prome Stage 128 



(cc) The Occurrence of Petroleum • 129 



3 Stratigraphical Features .... 132 — 137 



A. The Superficial sections .... 132 



B. The sections of the drilled wells . • 133 



Chapter VI.— THE OCCURRENCE OF PETROLEUM AT 



OTHER LOCALITIES IN UPPER BURMA . 137 



Chapter VII.— RELATION BETWEEN THE OCCUR- 

 RENCE OF PETROLEUM AND THE 

 MAIN STRUCTURAL LINES OF UPPER 

 BURMA 138—142 



Chapter VIII.— CHEMICAL COMPOSITION AND PHY- 

 SICAL PROPERTIES .... 143—159 



Part II.— ECONOMIC IMPORTANCE OF THE OIL- 

 FIELDS OF BURMA 160 



Chaptbr I.— THE YENANGYOUNG OIL-FIELD. . .160—202 



1. The Community of Twinzayos and their history 160 



2. The Construction of the Pit wells . . . 164 



