162 



PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [June 17, 



beautiful white stone used in most of the public buildings at Sevasto- 

 pol was obtained from these quarries : when first worked, it is soft, 

 but becomes harder on exposure to the atmosphere. 



From the Steppe-limestone, which belongs to the Newer Tertiary 

 formation, and forms the whole plateau before Sevastopol, as well 

 as the northern and greater portion of the peninsula, collections were 

 made at the Quarantine Harbour, Monastery of St. George, and Gorge 

 of Iphigenia ; the condition of the deposits and their fossil contents 

 at the two latter places being very similar. 



These Upper Tertiary deposits, occurring in the various conditions 

 of shelly and oolitic limestones and sands, sometimes associated with 

 volcanic ashes, tufa, &c, are mostly marine, but sometimes of fresh- 

 water origin, and more or less fossiliferous. This series is well ex- 

 posed at the Monastery of St. George, near which may be seen the 

 point of junction between them and the Jurassic formation. 



From a fine-grained yellowish calcareous deposit of the Upper 

 Tertiary at Quarantine Harbour, I obtained several species of Tro- 

 chus, with other well-preserved shells, herewith described. 



Section of Newer Tertiary Strata, at the Cliff' {about 400 feet high) 

 West of the Monastery of St. George. 



[About 50 feet of the upper part, including R and Q, are undescribed.] 



R. 



Compact shelly limestone, contain- 

 ing pebbles. Cardium protractum, 

 C. Demidoffi, Cyprina ? triangulata, 

 Pleurotoma, and Buccinum. 



Q. 



(P, N, L, and J to C are tuff-like calca- 

 reous rocks.) 



P. White, very crystalline, unstratified 

 (10 feet) ; upper part oolitic, with 

 small spiral shells. Cerithium trun- 

 catum, C. trochleare, Pholas Hom- 

 marei, and Planorbis cornucopia. 



0. Seam of clay. 



N. White, honeycombed; fossils as in 

 bed I. 



M. Seam of clay. 



L. White (2 feet). 



K. Thin seam of clay. 



J. White, somewhat crystalline, made 

 up of small fossils (4 feet). Astarte 

 pulchella and Venus minima. 



1. White (3 feet) ; with numerous small 



fossils and rounded fragments of 



various rocks. Astarte pulchella and 

 Venus minima. 



H. W T hite (4 feet) ; very much honey- 

 combed, and divided half-way by a 

 layer of quartzose and other frag- 

 ments. No fossils. (" Porous, ir- 

 regularly deposited." Du Bois.) 



G. Coarse (1 foot). 



F. Fine (1 ft. 6 in.). 



E. Coarse (1 ft.). 



D. Fine white (5 ft.). No fossils. 



C. Red (6 ft.) ; full of Helix Duboisii, 

 H. Bestii, Planorbis obesa, with 

 Bulimus Sharmani and Cyclostoma 

 reticulatum. 



B. Yellowish-white layers (30 feet) ; 

 unfossiliferous. (Whitish sand in 

 layers, unfossiliferous. Du Bois.) 



A. Somewhat honeycombed rock, with 

 few fossils. 



Volcanic rocks, at the base, with veins 

 of limestone. 



For detailed descriptions of the Geology of this country, see 



I. Travels through the Southern Provinces of the Russian Empire 

 in the years 1793 and 1794. By Peter Simon Pallas, M.D., 

 F.R.S. London, 1842.' 



