6 KOTO : NOTES ox THE GEOLOGY 



tongue, which projects out from >Sei-shi-an^^ towards the citadel 

 of Baku, thus enclosing within it a safe harbour, — we see the second 

 slteet of flow, beautifull}^ exposed along the steep declivity all round 

 the shore under the uppermost lava-liow, from which it is 

 separated by a thin bed of tuffite. This is a most extensive and 

 strong sheet, aggregating about 1() m. In its upper portion, the 

 lava is porous, whitish, and much decomposed, Avhile the lower 

 portion is fresh and compact. It is the one which we usually 

 see along the sea-shore on whose tra})pean üoor the rollers 

 break and recoil in tumultuous waves. 



The third is the lowest, consequently the oldest flow visible 

 in the Pescadores, and frequently forms the floor of the coast, when 

 the second sheet, already referred to, makes its appearance higher 

 up the precipice. It is likewise doleritic and porous as in the 

 above flow, and this Basalt is well seen at the environs of .liri, 

 already referred to, where it is underlaid by a meagre lignite- 

 bearing bed. It rarely happens to come to the surface not because 

 of its absence but that it is hidden under the level of sea. 



Tertiary strata, often accompanied by lignite seams, occur 

 inserted between the iirst and second flows, and also below the 

 third sheet. An undeterminable cast of gastcropod together with 

 an Area were secured by Saitû from the corresponding bed at 

 Bun (Lun) point in the Island of Gio-ô. The sure proofs of their 

 being of the Tertiary age are not at hand ; but from the analogy 

 of the occurrences of Basalts in the neighbouring regions, I 

 conjecture the sediraeutaries, here referred to, to be of later Terti- 

 ar}^ According to Cholneckv"', two volcanic lines are said to be 



1) mm- 



-) ' Vurlilufiger Eeiiclite über meine Forsclumgsreibe in China.' Petcrmanns JfiUh. 45, 

 1S99, S. 8. 



