CONTENTS: I. INTRODUCTION (i) Physiography, Garo Hills, Khasi Hills, Jaintia Hills, (ii) Drainage, (iii) Climate, (iv) Flora and Fauna, (v) Previous Work, (vi) Acknowledgement, II. GENERAL GEOLOGY AND STRATIGRAPHY: (A) Older Supracrustals, (B) Assam Meghalaya Gneissic Complex, (C) Shillong Group (D) Khasi Mafic Felsic Intrusives, (E) Granite Pluton, (i) Kyrdem Granite Pluton, (ii) Nongpoh Granite, (iii) Mylliem Granite, (iv) South Khasi Granite, (F) Lower Gondwana Group, (G) Sylhet Traps, (H) Sung Alkaline Complexes, (i) Alkaline-ultramafic-carbonatyite complex of Sung, (ii) Mawpyut or Mupyut ultramafic-mafic-alkaline complex, (iii) Rongjeng-Nongchram lamkprophyre, basic and alkaline dyke, (iv) Nongryngkoh-Jarain-Padu picritic tholeiite and alkaline dykes/dykelets swarm, (I) KHASI GROUP: (i) Jadukata Formation, (ii) Mahadek Formation, (J) JAINTIA GROUP: (i) Langpar Formation, (ii) Shella Formation, (iii) Kopili Formation, (K) BARAIL GROUP, (L) GARO GROUP: (i) Simsang/Chokpotgri Formation, (ii) Baghmara or Boldamgiri Formation, (iii) Chengapara Formation, (M) SURMA GROUP, (N) DUPITILA GROUP, (O) Quaternary and Recent deposits, III. TECTONIC SET UP, iv. STRUCTURE: (i) Shear Zones, (ii) Lineaments and faults, (iii) Domal Structures, V. GEOLOGICAL HISTORY: Meghalayan Age, VI. MINERAL RESOURCES: (i) Limestone, (ii) Coal, (iii) Sillimanite, (iv) Base Metals, (v) Feldspar, (vi) Glass Sand, (vii) Kaolin/Clay, (viii) Dimension Ston e, (ix) Lateritic Bauxite, (x) Rare Earth Elements (REE) (xi) Iron ore, (xii) Titaniferous Vanadiferous Magnetite, (xiii) Apatite/Rock Phosphate, (xiv) Molybdenum, (xv) Silver, (xvi) Uranium, VII. LOCALITY INDEX, VIII. BIBILIOGRAPHY.