ii 



PART 2. 



GEOLOGY OF THE NORTHERN SHAN STATES: BY T. H. D. 

 LA TOUCHE, M.A., F.G.S., LATE OFFICIATING DIRECTOR, 

 GEOLOGICAL SURVEY OF INDIA. (With 27 plates and 11 Text 

 Figures.) 



Page. 



Chapter I. — Introduction - . 1 



Chapter II. — Physical Geology 13 



Chapter III. — Geological Formations ...... 27 



Chapter IV. — Arch.ean — 



Mogok Gneiss 33 



Chapter V. — Tawng Peng System— 45 



Mica Schists of Mong Long 46 



Chaung Magyi Series ...... 47 



Bawclwin Volcanic Stage ..... 55 



Intrusive Rocks ....... 59 



Chapter VI. — Ordovician System — 63 



Ngwetaung Stage ...... 66 



Lower Naungkangyi Stage ..... 67 



Upper Naungkangyi Stage (Western Area) . . 84 



Upper Naungkangyi Stage (Eastern Area) . . 92 



Nyaungbaw Stage ...... 119 



Chapter VII. — Silurun System 125 



Llandovery Group (Pangksa-pye Graptolite Band) . 125 



Lower Namksim Stage ..... 129 



Upper Namhsim Stage (Konghsa Marls). . . 139 



Chapter VIII. — Silurian System — 



Zebingyi Stage 163 



Chapter IX. — Plateau Limestone (Devonian Section) . . . 182 



Padaukpin Coral Reef . . . . • 196 



Wetwin Shales 241 



Chapter X. — Plateau Limestone (Permo-Carboniferous or Anthra- 

 colithic Section) ...... 



256 



