16 Mr, W. J. Hamilton and Mr. H. E. Strickland, on the Geology of 



beds of flint which accompany it, to the lacustrine deposits of Smyrna and other 

 places, induces us to refer it provisionally to the same group. The formation ex- 

 tends to the Lake of Apollonia and reappears at Kirmasli, whence it sends a 

 branch up the valley of the Rhyndacus as far as Kesterlek. 



(6.) Basin of Dunddr (lat. 39° 50'). — This basin is of small extent, occurring 

 in a valley on the S.W. side of the Rhyndacus. The deposit is a soft, white, 

 sandy limestone, dipping at the village of Bourmah, about 10° E.S.E. Here also, 

 having found no fossils, we are guided only by analogy in referring it to the lacus- 

 trine group. 



(c.) Basin of Harmanjik (lat. 39° 47')- — This is bounded on the north by the 

 schistose hills which form the base of Mount Olympus, and on the S.E. by the 

 volcanic rocks of Eshen. It consists throughout of white limestone horizontally 

 stratified. Like similar deposits in Auvergne and the Cantal*, it contains an 

 abundance of black flint in beds and nodules ; and considerable quantities of gun- 

 flints are made there and sent to Constantinople. Near Haidar, at the northern 

 limit of the basin, is a picturesque gorge, at least 600 feet deep, traversed by 

 the Rhyndacus, which affords an admirable section of the horizontal strata on 

 each side. The limestone contains a small turrited species of Paludina, resem- 

 bling P. acuta (Michaud), or P. stagnorum (Turton). A species, similar in form 

 but double the size, occurs associated with a Limnaea near the south boundary o^ 

 the basin, about five miles from Harmanjik, and two from Eshen. 



{d.) Basin ofTaushanli (lat. 39° 35'). — The trappean rocks of Eshen (postea, p. 23) 

 separate this basin from the last. The lacustrine deposit, if such it be, has received 

 considerable modification from the vicinity of the igneous rocks, which appear to ' 

 have been in action during its deposition. In place of a pure earthy limestone, 

 we have a peculiar kind of tufa or peperite, composed of particles of quartz im- 

 bedded in a felspathic cement, and accompanied by hexagonal crystals of horn- 

 blende. Near Taushanli this tufa becomes more calcareous, and contains angular 

 fragments of jasperine rocks f. It is capped by a stratum of brown impure jasper, 

 containing a large proportion of iron J. 



The alluvial plain of Taushanli is surrounded by platforms of this tufaceous 

 deposit, — the scattered outliers of a formation once continuous. No organic 

 remains were noticed. 



* See Scrope on Central France, p. 2.5. Lyell's Principles of Geology, 3rd edition, vol. iv. p. 106, &c. 



t Mr. Hamilton is of opinion that this tufaceous deposit, which he observed in many other parts of 

 Asia Minor, does not belong to the lacustrine group, but is anterior to it, being in fact an accompaniment 

 of the trachytic rocks which everywhere appear in its neighbourhood. 



I This deposit of tufa and jasperine rocks is probably continuous with a similar district on the north 

 of Kutahiyah, described by Mr. Fellowes in his " Excursion in Asia Minor," pp. 128, 129. 



n 



