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 and Kheri, Central Provinces. By Sunder Lal Hora, D.Sc., F.R.S.E., F.N.I., Assistant Superintendent, Zoological Survey of . M147742 Tirodite, a manganese amphibole from Tirodi, Central Provinces Quarterly Statistics of Production of Coal, Gold and Petroleum in India including Burma: January to March 1938. Bismuthinite and bismutosphærite from Manbbum. (With Plate 19) 135-144 145-156 The Mineral Production of India and Burma during 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 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 PLATE 2.-FIG. 1.-Deccan trap country, Samoi, Jhabua. FIG. 2.-General view of Aravalli quartzite ridges, Umria, Bariya FIG. 2.-Low-dipping Aravalli slaty and quartzitic bands, south of PLATE 4.--FIG. 1.-Much jointed Aravalli quartzite, Edalwara, Bariya State. FIG. 2.-Weathering of granite, Kothamba, Lunavada 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 PLATE 7.—FIG. 1.-Wolfram (W) crystal replaced by schcelite (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 X 54. FIG. 4.-Pyrite (P) veining tourmaline (T), and both replaced and veined by chlorite (C). P. S. 239 B. × 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 FIG. 3.-Arsenopyrite needles in chlorite (dark grey); the latter 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. × 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 molybde nite. 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. × 235. FIG. 3.-Zoning in cassiterite (thin section). Mic. slide 24690. X 24. PLATE 11.—FIG. 1.-Cassiterite replaced by interstitial felspar. Mic. slide 24680. 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 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). 268. X 54. FIG. 2.-Wolfram (light grey) brecciated and veined by quartz FIG. 3.-Cassiterite (dark grey) replaced by wolfram (grey). Quartz appears also to be Quartz (Q). P. S. 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. |