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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,
Geological Survey of India
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.,
F.R.A.S.B., Director, Geological Survey of India.
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.
(With Plates 15 and 16)
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
India, Calcutta. (With Plates 17 and 18)
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,
Geological Survey of India. (With Plates 20 to 24)
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
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
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. 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
(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 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
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.
FIG. 4.--Sphalerite (S) veining and replacing arsenopyrite (A). Also
chalcopyrite (C) and carbonate (Ca). P. S. 242.
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.
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.
FIG. 4.--Tourmaline (T) replaced by muscovite (M) and chlorite (Ch)
in cassiterite (C) and wolfram (W). Mic. slide 24681.
PLATE 11.—FIG. 1.-Cassiterite replaced by interstitial felspar. Mic. slide 24680.
FIG. 2.-Cassiterite replaced and veined by beryl. Mic. slide 24687.
FIG. 3.-Beryl replaced along its cleavage, at walls of scheelite vein.
Mic. slide 24685. X 24.
FIG. 4.-Scheelite replacing platy carbonate. Mic. slide 24683.
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). 268. X 54.
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.
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.