FOSSILS FROM THF FW I RONS OF TOKYO. 



[):\ 



-Loam. i").78 uietie) 





■■•<>j ■ -Oo-it»'." -, 



responds to that oi" ( )ji. This l)ro\viiish chiy cuntaiiis plant leaves 

 like those found in the corresponding clay at Oji. A ibssil local- 

 ity of Tabata, a place situated between Oji and Tokyo, lies at the 

 foot of a })hiteau which is a southern continuation of that of Oji. 

 Some years ago a good geological profile was exposed by a cut- 

 ting made for ]-ailway purposes. The brownish and bluish clay 

 layers at the bottom of my profile (Fig. 4) contain ditterent 



kinds of fossils at diti'erent 

 jiarts even of the same hori- 

 zon. In some parts we find 

 numerous plant leaves, while 

 in others trunks of trees 

 and shells. Where the 

 shells are numerous, the 

 clay jjasses into sands. These 

 clay layers must represent 

 those of the plant bearing 

 clay of Oji and Shinagawa. 

 The fossil layer of ISuruga- 

 dai, whence Bkau>'S obtain- 

 ed some of his specimens, 

 is at present not accessil)le on account of the considerable 

 weathering of the rock surface. But it is almost certain that 

 it is a continuation of the shell-bed of Tabata, the geological 

 profile being the same in both localities, and most of the shells 

 collected by Beauts belong to those forms which are found at 

 Tabata. In the three profiles above mentioned, the uppermost 

 part which consists of loam with underlying gravel is decidedly 

 diluvial. Below the gravel lie brownish and bluish clays which 

 are represented partly by a shell-bearing sand, as at Tabata. 



■ .« » • o 



;-c>V:'-o->o>.o;^f ^•.■•î ^ -oT-î.'/o j°;: 



-^^-•^^••'=^E,^^L-r^^-=.-:^-^-^-=?)-Hru\viiisli Clav 



■Gravel layer (i 

 metre) 



IJliiish clay 



Fil!-. 4.— Profile :it Talnitii Ib^.sil l)e<l. 



