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COLBERT, E. H. 1935 (2). Siwalik Mammals in the American Museum of Natural History. Trans. Amer. Phil. Soc., N. S. XXVI, pp. 401, Map and 198 text figs.


COOPER, C. FORSTER Miocene Proboscidea from Baluchistan. Proc. Zool. Soc. London, pp. C09-626, pl. i-iv, 12 text figs.

DEPERET, C. 1887 .




AND ROMAN, F. 1923.


FALCONER, H. 1868 .

HOPWOOD, A. T. 1935


Recherches sur la succession des Faunes
de Vertébrés Miocènes de la Vallée du
Rhône. Arch. Mus. Hist. Nat. Lyon,
IV, pp. 45-313, pl. xii-xxv.

Les animaux Pliocènes du Roussillon, Mem.
Soc. Géol. France, Pal. pp. 1-152, pl.

L'évolution des Mammifères tertiaires;

importance des migrations, Epoque miocène. C. R. Acad. Sci. France, CXLIII, p. 1120.

L'évolution des Mammifères tertiaires; importance des migrations. Epoque pliocène. C. R. Acad. Sci. France, CXLVIII, p. 140.

Les Elephants Pliocènes, Ann. Univ. Lyon., N. S. fasc. 42, 224 pp., 11 pl., 33 text figs.

Observations on the Upper Siwalik formation and later Pleistocene deposits in India. Proc. Amer. Phil. Soc., LXXVI, pp. 791-822, 14 text figs. Palæontological Memoirs, edited by

Murchison C. Vol. I, pp. 1-590, pl.
i-xxxiv, Vol. II, pp. 1-675, pl. i-xxxviii.
8vo. London.

Fossil Elephants and Man. Proc. Geol.
Ass. London., XLVI, pp. 46-60.
The former distribution of Caballine and
Zebrine horses in Europe and Asia.
Proc. Zool. Soc. London, 1936, pp. 897-
912, pl. i, ii, 2 text figs.

LEWIS, G. E. 1937.


MATTHEW, W. D. 1929

MAYET, L. 1908

MCGREW, P. O. AND MEADE, G. E. 1938.

MERRIAM, J. C. 1919

OSBORN, H. F. 1936

PILGRIM, G. E. 1912





A new Siwalik correlation. Amer. Jour.

Sci., XXXIII, pp. 191-204, 2 text figs. Catalogue of the Fossil Mammalia in the British Museum (Natural History), part iii, pp. xi-186, 30 text figs., British Museum, 8vo. London.

Critical observations upon Siwalik Mammals. Bull. Amer. Mus. Nat. Hist., LVI, pp. 437-560, 55 text figs. Étude des Mammifères Miocènes des Sables de l'Orléanais et des Faluns de la Touraine. Ann. Univ. Lyon, N. S. fasc. 24, pp. 1-336, 12 pls., 100 text figs. The bearing of the Valentine area. in continental Miocene-Pliocene correlation. Amer. Jour. Sci., XXXVI, pp. 197-207.

Tertiary Mammalian faunas of the Mohave desert. Univ. Cal. Publ. Bull. Dep. Geol. Sci., XI, 5, pp. 437-585, 253 text figs. Proboscidea. pp. xxx. 802, 13 pl., 680 text figs., 4to. New York, American Museum Press.

The Vertebrate fauna of the Gaj series

in the Bugti Hills and the Punjab. Pal. Ind., N. S. IV, Mem. 2, pp. 1-83, pl. i-xxxi.

Correlation of the Siwaliks with Mammal horizons of Europe. Rec. Geol. Surv. Ind., XLIII, pp. 264-326.

Catalogue of the Pontian Carnivora of Europe in the British Museum. pp. 1-174, pls. i, ii, 30 text figs., British Museum, 4to. London.

The fossil Carnivora of India. Pul. Ind. N. S. XVIII, pp. 1-232, 10 pls., 2 text figs.

Correlation of ossiferous sections in the

Upper Cenozoic of India. Amer. Mus.
Nov. No. 704, pp. 1-5.

PILGRIM, G. E. 1939


STEHLIN, H. G. 1904

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N. S. XXVI, pp. 1-358, pl. i-viii, 35 text figs.

Die Mastodonten der Budapesten Samm-lungen. Geol. Hungarica, II, fasc. 1,

pp. 1-284, pl. i-xxii, 3 text figs.

Une faune à Hipparion à Perrier. Bull.
Soc. Géol. France. (4), IV, pp. 432-444.

TEILHARD, P. AND PIVE- Les Mammifères fossiles de Nihowan. Ann. Pal. Paris, XIX, pp. 1-134, pls. i-xxiii, 42 text figs.

TEAU, J. 1930.

TEILHARD, P. AND STIR- A correlation of some Miocene and Plio

TON, R. A. 1934.

TOBIEN, H. 1938

VIRET, J. 1939

cene Mammalian assemblages in North America and Asia, with a discussion of the Mio-Pliocene boundary. Univ. Cal. Publ. Bull. Dep. Geol. Sci., XXIII, 8, pp. 277-290.

Über Hipparion-Reste aus der Ober Miozänen Süsswassermolasse Südwestdeutschlands. Zeits. Deutsch. Geol. Gesells. XC, pp. 177-192, pl. vi. Monographic Paléontologique de la Faune de Vertébrés des Sables de Montpellier : Carnivora Fissipedia. Trav. Lab. Géol. Univ. Lyon. fasc. xxxvii, mém 2, pp. 1-26, pl. i-ii, 6 text figs.



BALUCHISTAN (QUETTA) EARTHQUAKE OF MAY 31, 1935. BY K. R. RAMANATHAN, M.A., D.SC., AND S. M. MUKHERJI, M.Sc., Colaba Observatory, Bombay. (With plates 25 to 28.)


A preliminary account of the earthquake from the geological and general points of view has been published by Mr. W. D. West1 in the Records of the Geological Survey of India. From the field evidence, Mr. West concluded that "in the case of the present earthquake there is no doubt about the position and extent of the epicentre, since severe damage was confined to a long narrow tract, away from which the intensity of the damage rapidly decreased. This tract extended from Baleli just north-west of Quetta through Dingar and Mastung to Mand-i-Haji and included the Shirinab Valley to the west of the Mastung-Kalat road. It is an area about 68 miles long and 16 miles wide. Within this area there were clearly places where the intensity was greater than elsewhere, notably Dingar and Mastung road and possibly Mand-i-Haji. Since it is well known that earthquakes are more severely felt on alluvium than on solid rock, it is possible that the length of the epicentral area as compared with its breadth has been enhanced to some extent by the fact that it is parallel to the valleys of the district." The surface crack extended from about 30°-3 N., 66°.9 E. to 29°•1 N., 66°-5 E., the centre of the region of maximum disturbance being 29°-7 N. and 66°-7 E. From the seismological evidence, the best position for the epicentre appears to be 29°-6 N., 66°-5 E., slightly to the south-west of the above position, but well within the region of maximum intensity.

The materials available for study.

The following materials were available for the seismological study of the present earthquake.

1. The seismograms (horizontal components only) of the Indian observatories: Bombay, Agra, Calcutta, Hyderabad and Kodaikanal.

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1 W. D. West, Preliminary geological report of the Baluchistan (Quetta) Earth- quake of May 31st, 1935." Rec. Geol. Surv. Ind., LXIX, Pt. 2, p. 203, (1936).

2. The seismograms of 15 foreign observatories: Batavia, Chiu-
feng, Medan, Peichiko, Tokyo, Göttingen, Ivigtut, Pul-
kovo, Scoresby Sound, Vienna, Adelaide, Melbourne,
Sydney, Ottawa and Tacubaya. These seismograms had
been obtained from the Directors of the respective ob-
servatories by Dr. S. C. Roy and were kindly placed
at our disposal for purposes of study.

3. The data of travel-times of the principal phases recorded
at 142 observatories, as measured at the observatories
themselves and mostly collected at Oxford for the
purpose of
the International Seismological Summary.
These were obtained from Miss Bellamy by the Director
of the Geological Survey of India and kindly sent to us.
Some data were also taken from observatory bulletins.

The position of the epicentre and the time of origin of the earthquake.

For determining the epicentral time and position of the earthquake, only the arrival-times of the P phase at different observatories were used, as this phase is in general the least subject to uncertainty. As a first approximation, the centre of the region of greatest disturbance in Mr. West's map of isoseismals was assumed to be the epicentre. The distances of the different observatories from the assumed epicentre were calculated from the geographical co-ordinates and using Jeffreys' and Bullen's table of traveltimes (published in 1934 in the International Seismological Summary for the year 1930), the times of arrival of P at the different places were calculated and compared with the observed times of arrival. A comparison of the mean residuals (observed minus calculated times) at observatories situated in different azimuths showed in what manner the hypothetical epicentre should be shifted in order to get a better fit and thus, by a process of successive approximation, the best position of the epicentre was determined and the corresponding epicentral time to calculated. The distribution of stations in different directions is markedly non-uniform, the directions best represented being north-west and north-east. Towards the south, the number of stations is few, and even among them, the times of first onset as recorded at the Indian stations were abnormally

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