LOFTUS TURKO-PERSIAN FRONTIER. 247 



Ofi the Geology of portions of the Turko-Persian Frontier, 

 and of the districts adjoining. By William Kennett 

 LoFTUs, Esq., F.G.S. 



(Communicated from the Foreign Office, by order of the Earl of Clarendon.) 

 [Read June 21*, 1854.] 



[Plate IX.] 



Note. — The publication of this Memoir having been unavoidably postponed, 

 the Council thought proper that a full Abstract should appear in its place in 

 No. 40 of the Society's Journal. This Abstract (Journ. vol. x. p. 464, &c.) 

 will prove of the more service, as illness before the completion of the Survey, 

 and afterwards multiplicity of business previous to his second departure from 

 England, rendered it impossible for the Author himself to draw up a summary of 

 his views, or even to conclude his Memoir, as he had intended, with general 

 remarks on the whole subject. — Ed. 



[Contents.] 

 Introduction. 



Part I. (Southern Portion of the Frontier). 

 I. Recent Deposits. 



1. Alluvium. 



A. Fluviatile alluvium. 



B. Marine alluvium. 



2. Lacustrine deposit. 



3. Limestone gravel. 

 II. Tertiary Rocks. 



1. Gypsiferous Series. 



Bituminous products. 



2. Nummulitic Series. 



Altered nummulitic limestone. 



Tangs or transverse clefts in the limestone saddles. 



Longitudinal fractures. 



III. Secondary Rocks. 



1. Upper Secondary or Cretaceous Series. 



2. Lower Secondary Series. 



IV. Palaeozoic Rocks. 



V. Metamorphic schists. 

 VI. Plutonic Rocks. 



Granites. 

 VII. Trappean Rocks. 



Part II. (Northern Portion of the Frontier). 



Introduction. — The notes from which the followmg paper f has 

 been compiled were made in the years 1849-52, during the progress 

 of a joint Commission appointed by the EngUsh, Russian, Turkish, 

 and Persian Governments for the demarkation of the Turko-Persian 

 Frontier. 



For the greater part of the first three years various pohtical ques- 

 tions detained the Commissioners on the alluvial banks of the Lower 

 Tigris, where but little scope exists for the labours of the geologist. 



* For the other Communications read at this Evening Meeting, see Quart. 

 Journ. Geol. Soc. vol. x. p. 454, &c. 



t The collections of rock-specimens and fossils made by Mr. Loftus are 

 deposited in the British Museum, the Museum of Practical Geology, and the 

 Museum of the Geological Society. — Ed. 



