2 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [NoV. 7, 



and east sides of the lake a conglomerate occurred, dipping with a 

 slight inclination towards the lake. Ouram Mountain, in the rear 

 of Niceea, appeared to be composed of tufa. Tufa also occurs on the 

 shore near Keramid. 



Between Ghio and Brussa the prevailing rocks are limestone, con- 

 glomerate, and sandstone. 



In consequence of rumours of the existence of coal near the Lake 

 of ApoUonia, Mr. Poole travelled round that lake, but met with 

 none. Limestone and sandstone prevail there. 



Subsequently Mr. Poole went from Yallova (in company with Mr. 

 Sandison) inland to Ortokoi, without finding any traces of a coal- 

 formation. He next went from Yallova westwards along the coast 

 as far as Kourikoi, where a bed of lignite, 9 inches thick, occurs ; this 

 is said to have been worked to some extent (by a 60 yards' level) by 

 the Armenians four years since ; thence he went inland to Sulimanli 

 without seeing any indications of coal. He then proceeded to visit 

 Arli Effendi's coal, near the village of Tchoukurkoi, S.E. of Yallova 

 at three hours' distance. Along a ravine here lignite occurs in a 

 seam varying from 1 to 4 feet in thickness, and dipping S. 23° E. at 

 an angle of 52°, with coarse sandstone above and below it. This 

 lignite also has been worked some years since by the Armenians. It 

 was from this lignite that samples had been sent to Mr. Sandison* ; 

 but in Mr. Poole's opinion it is of no promise. 



Another excursion was to the Lake Sabandji, where a thin seam 

 of lignite crossing the road on the south of the lake, and a lignite at 

 Ak Sophe, to the east of the lake, were visited. Nowhere did Mr. 

 Poole find proof of the existence of good workable coal in the districts 

 above referred to. 



Subsequently he proceeded to visit the Kosloo and Zungeldek 

 coal-district. , 



In a letterf to Sir R. Murchison, Mr. Poole makes the following 

 observations on the geology of the districts through which he passed 

 on his last tour of inspection. Going from Constantinople to Yallova 

 in an open boat, he observed that at Touzla Point the limestone has 

 been squeezed into zigzags, with intervening concentric bands, as if 

 pressure had been applied from below. Salt is made from a small 

 lake near the Point; and lead-mines are worked at two hours' 

 distance. 



From Yallova, writes Mr. Poole, I rode to the top of the ridge 

 which overlooks Ortokoi, where I had been on my former tour ; after 

 crossing the plain, I found coarse sandstone dipping S.E. at about 

 45°. The next ridge had soft red sand overlying micaceous rock, 

 which dipped 23° N. 34° W. After crossing the ridge, the rock 

 was nearly vertical, dipping S. and E. I then crossed to the west 

 side of the brook, and found limestone all along its western side. 



Going along the shore from Yallova in a westerly direction, at 

 Ghiuz Tepe, I met with sandstone, dipping S. 48°, full of broken 



* See Quart. Journ. Geol. Soc. vol. xi. p. 476. 

 t Dated Constantinople, Sept. 21, 1855, 



