INTRODUCTION. 9 



121. Strachey, R.— On the physical geography of the provinces of Kumaon and 



Garhwal in the Himalayan mountains and the adjoining parts of 

 Thibet. Jour. Roy. Geogr. Soc, XXI, 57 -85. 1851. 



12 2. On the physical geology of the Himalayas. Quart. Jour. Geol. 



Soc, X, 249— 2 53- 1854. 



123. R. S. (Strachey, R.)— " Himalaya" article in the Encycl. Brit., Vol. XI, pp. 821 



-836. 

 12 a. — . See Suess, Eduard. 



125. Suess, Eduard. — (Letter on triassic fossils collected by Genl. R. Strachey), Verh. 



Geol. Reichsanst. i8f"2, Vol. XII, p. 258. 



126. — Das Antlitz der Erde. Wien, 1885. 8°. 



127. Theobald, W.- On the Kumaon lakes. Rec. Geol. Surv. Ind., XIII, .. 61 — 175. 1880. 



128. Traill, G. W. — Report on the Bhotia Mahals of Kumaon. Jour. As. Soc, Beng., II, 



551; reprinted in Kumaon rep: see Batten. As. Res., XVII, 

 s p. 1. 1829. 



l2 g. Statistical sketch of Kumaon. As. Res., XVI, pp. 137— 234. 1828. 



130. Weller, J A. — On a trip to the Bulcha and Oonta Dhoora passes. Jour. As. Soc. 



Beng., XII., 78—102. 1843. 



All the papers recorded in this list of literature contain mention, 

 more or less extensive, of the rocks and minerals found in the Central 

 Himalayas or adjoining regions, but practically only the following 

 authors need be considered here : — 



1 85 1. Strachey, R. — On the geology of part of the Himalaya 

 mountains and Thibet. — Quart, Jour. Geol. Soc, VII, 

 292 — 310. 



General Strachey gives, in this short paper, the results of many 

 years of study in the Central Himalayas and the adjoining province 

 of Hundes ; with the map it forms by far the most important contribu- 

 tion to our knowledge of the geology of the Himalayas. He distin- 

 guishes correctly, in the main, the various systems which he met north 

 of the great gneissic axis, although all detail is avoided. In descend- 

 ing order he distinguishes — 



7 Tertiary deposits of Hundes. 



6 Grits, shales and limestone. 



5 Shales (Oxford, Spiti shales). 



4 Jurassic series (limestone, etc.). 



3 Trias. 



2 Palaeozoics. 



I Azoic slates. 

 Soon after the publication of this paper, notes and descriptions of 



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