INTRODUCTION, 



'3 



to the conclusion that we must rather look to subsidence than 

 " upheaval " as the primary cause of this folding process. In his 

 second paper the author has compiled all the knowledge we possess 

 of the geological structure of the Kumaon and Garhwal Himalayas 

 It is chiefly a summary of the author's own work in the Lower Hima- 

 layas and Siwaliks, and a reprint of General Strachey's paper above 

 quoted, and forms an exceedingly important addition to the Hima- 

 layan literature. 



1880. Griesbach, C L. — Geological notes. Rec, Geol. wSurv #i Ind , 

 XIII, 83—93. (1S80). 



1880. Palaeontological notes. Ib.g^. — 113. 



In these papers I have given preliminary notes on my first 

 season's work in the Himalayas, which will be found in greater detail 

 in the pages of this memoir. 



1887. Oldham, R. D. — Notes on some points of Himalayan Geolo- 



gy. Rec, Geol. Surv., Ind., XX, 155 — 161. 



1888. The sequence and correlation of the pre-tertiary sedimen- 



tary formations of the Simla region, etc. lb., XXI, 130 



— 143- 

 1-888. Some notes on the geology of the North- Western Hima- 

 layas, XXI, 149 — 159. 

 Mr. Oldham touches upon some points closely connected with the 

 structure of the Central Himalayas besides giving his views on the 

 Spiti section. The latter are founded on insufficient data, which 

 I have shown in a paper, 



1889. Geological notes. Rec, Geol. Surv., Ind., XXII, 158 — 167 



(1889), to be to some extent untenable. In the chap- 

 ter on the Spiti sections I shall again refer to these 

 differences. 

 The papers by Colonel McMahon and the later ones by Mr. Mid- 

 dlemiss, although of great importance generally, and especially so as 

 regards Himalayan geology, do not directly deal with ground describ- 

 ed in this memoir, and I therefore need not do more than refer the 

 reader to the foregoing list of authors. 



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