CONTENTS. General Report of the Geological Survey of India for the year 1937. By A. M. Heron, D.Sc., F.G.S., F.R.G.S., F.R.S.E., F.R.A.S.B., F.N.I., Director, Geological Survey of India The Hindu Kush Earthquake of the 14th November 1937. By A. L. Coulson, D.Sc., D.I.C., F.G.S., F.N.I., Superintending Geologist, On Khoharite, a New Garnet and on the Nomenclature of Garnets. By Sir Lewis Leigh Fermor, O.B.E., D.Sc., F.R.S. Provisional Statistics of some of the more important Indian Minerals for 1937. By A. M. Heron, D.Sc., F.G.S., F.R.G.S., F.R.S.E., The Geology of Gujarat and Southern Rajputana. By B. C. Gupta and P. N. Mukerjee, B.Sc. (Cal.), M.Sc. (Lond.), D.I.C., Assistant Geologists, Geological Survey of India. (With Plates 1 to 5) Tin-Tungsten Mineralisation at Mawchi, Karenni States, Burma. By J. A. Dunn, D.Sc. (Melb.), D.I.C. (London), F.N.I., F.G.S., Petro- logist, Geological Survey of India. (With Plates 6 to 12) Tin-Tungsten Mineralisation at Hermyingyi, Tavoy District, Burma. By J. A. Dunn, D.Sc. (Melb.), D.I.C. (London), F.N.I., F.G.S., Petrologist, Geological Survey of India. (With Plates 13 and 14). Two Fossil Dicotyledonous Woods from the Garo Hills, Assam. By K. Ahmad Chowdhury, Forest Research Institute, Dehra Dun. On some Fossil Fish-scales from the Inter-trappean beds at Deothan Tirodite, a manganese amphibole from Tirodi, Central Provinces Quarterly Statistics of Production of Coal, Gold and Petroleum in M147742 The Western Margin of the Eastern Ghats in Southern Jeypore. By H. Crookshank, B.A., B.A.I. (Dub.), Superintending Geologist, Are the Equidæ reliable for the Correlation of the Siwaliks with the Cœnozoic Stages of North America? By Guy E. Pilgrim, D.Sc., F.G.S., with an Appendix by A. T. Hopwood, D.Sc., F.L.S.. A Seismological Study of the Baluchistan (Quetta) Earthquake of May 31, 1935. By K. R. Ramanathan, M.A., D.Sc. and S. M. Mukherji, M.Sc., Colaba Observatory, Bombay Contributions to the Geology of the Province of Yunnan in Western China. (10) The Distribution, Age and Relationships of the Red Beds. By J. Coggin Brown, O.B.E., D.Sc., M.I.M.M. Earthquake Shocks at Paliyad in Kathiawar. By H. Crookshank, B.A., B.A.I., D.Sc. (Dub.), Superintending Geologist, Geological Survey LIST OF PLATES, VOLUME 73. PLATE 1.-FIG. 1.-Aravalli schist country, south-west of Kundanpur, Jhabua State. FIG. 2.-View of Aravalli quartzite country, N.E. of Virpur, Balasinor State. PLATE 2.-FIG. 1.-Deccan trap country, Samoi, Jhabua. FIG. 2.-General view of Aravalli quartzite ridges, Umria, Bariya State. PLATE 3.-FIG. 1.--Aravalli quartzite (dip-slope), Hadaph river-section, Umria, FIG. 2.-Low-dipping Aravalli slaty and quartzitic bands, south of PLATE 4.--FIG. 1.—Much jointed Aravalli quartzite, Edalwara, Bariya State. PLATE 5.-Geological map of Gujarat and Southern Rajputana. PLATE 6.-FIG. 1.-Cassiterite (C) interstitial to wolfram (W). Quartz (Q). P. S. 252. X 54. FIG. 2.-Cassiteritic (C) and molybdenite (M) interstitial to wolfram (W). Bakelite (B). P. S. 251. Crossed nicols. X 54. FIG. 3.--Wolfram (W) partly enclosing a tourmaline crystal (T) in quartz (Q). P. S. 243. x 54. FIG. 4.-Scheelite (dark grey), replacing wolfram (light grey). P. S. 231. X. 54. PLATE 7.—FIG. 1.-Wolfram (W) crystal replaced by scheelite (S). Cassiterite (C) and quartz (Q). Bakelite (B). P. S. 251. X 28. FIG. 2.-Quartz (Q) replacing wolfram (W). A little pyrite (P). P. S. 236. × 54. FIG. 3.-Pyrite (white) veinlets in quartz (Q) and wolfram (W). P. S. 232 × 54. FIG. 4.-Pyrite (P) veining tourmaline (T), and both replaced and veined by chlorite (C). P. S. 239 B. X 54. PLATE 8.-FIG. 1.--Pyrite (P) and chalcopyrite (C), veining arsenopyrite (A). Quartz (Q). P. S. 164. X 28. FIG. 2.-Arsenopyrite (white) veined by chalcopyrite (grey) and carbonate (black). P. S. 164. X 180. FIG. 3.-Arsenopyrite needles in chlorite (dark grey); the latter replaces quartz (lighter grey) and galena (white). Pyrite (P). P. S. 236. X 54. FIG. 4.--Sphalerite (S) veining and replacing arsenopyrite (A). Also chalcopyrite (C) and carbonate (Ca). P. S. 242. X 84. PLATE 9. FIG. 1.-Quartz veins in sphalerite. P. S. 173. FIG. 2.-Starnite (S) and galena (G) which altered in part to cerussite (Ce). 166. Oil immersion. X 420. X 40. veined stannite but is Wolfram (W). P. S. FIG. 3.--Molybdenite flake (M) in bismuthinite (B) and quartz (Q), the bismuthinite replacing the quartz along the molybdenite. Note the strong difference in reflectivity between adjacent areas of bismuthinite. P. S. 175. X 54. FIG. 4.—Intergrowth of bismuthinite in galena. Crossed nicols. P. S. 235. X 54. PLATE 10.—Fig. 1.—Galena vein (white) in cassiterite (C). Quartz (Q). P. S. 235. X 180. FIG. 2.-Chalcopyrite (C) partly altered to chalcocite and covellite, and stannite (S) vein along cleavage in galena. P. S. 166. X 235. FIG. 3.-Zoning in cassiterite (thin section). Mic. slide 24690. X 24. FIG. 4.--Tourmaline (T) replaced by muscovite (M) and chlorite (Ch) in cassiterite (C) and wolfram (W). Mic. slide 24681. X 24. PLATE 11.—FIG. 1.-Cassiterite replaced by interstitial felspar. Mic. slide 24680. X 24. FIG. 2.-Cassiterite replaced and veined by beryl. Mic. slide 24687. X 24. FIG. 3.-Beryl replaced along its cleavage, at walls of scheelite vein. FIG. 4.-Scheelite replacing platy carbonate. Mic. slide 24683. X 24. PLATE 12.—FIG. 1.--Mica veins (M) in cassiterite (C). Note how one of them stops at the border of scheelite (S) after wolfram, and its position in the latter occupied by clear scheelite. Tourmaline (T). Mic. slide 24688. X 24. FIG. 2. Tourmaline (T) and cassiterite (C) veined by lepidolite (M). Mic. slide 24698. X 24. FIG. 3.-Relic quartz in platy carbonate. Mic. slide 24690. X 24. FIG. 4.-Platy carbonate. Mic. slide 24696. X 24. PLATE 13.-FIG. 1.-Wolfram veining muscovite (M) which interstitial to coarser wolfram (W). appears also to be Quartz (Q). P. S. FIG. 2.-Wolfram (light grey) brecciated and veined by quartz (dark grey). P. S. 268. X 54. FIG. 3.—Cassiterite (dark grey) replaced by wolfram (grey). Quartz vein to left. P. S. 266. X 54. FIG. 4.-Cassiterite (white) veined and replaced by quartz (grey). P. S. 265. X 54. PLATE 14.—FIG. 1.-Fluorite (F) replacing quartz (Q). Wolfram (W) and tungstite (T). Cracks in fluorite, infilled with bakelite, appear like quartz. P. S. 267. X 54. |