60 N. Kaneiiara 



have been derived from the rocks of the Carboniferous or Permian, 

 mainly by the contact action of the schistose granites and also partly 

 through dynamometamorphism ; good examples sho.ving the gradual 

 transition between the two are observable in the Tenryu-gawa region, 

 the Kasagi district and the shores of the Inland Sea. 



(b) Mesozoic Group. 



(1) Triassic System. 



The Triassic of Japan consists of marine and estuary deposits 

 distributed in small areas in Rikuzen, Awa and Higo in the Outer 

 Zone, and in Mino, Bitchti and Nagato in the Inner Zone. 



The ages of the fossiliferous beds are considered as follows : — 



Plant Bed of Yamanoi, Ehaetic 



Pseudomonotis Beds of Isatomae, Nariwa, 



Sakawa, etc., Noric 



Daonella Beds of Sakawa and Bifu, . ... Ladinic 



Ceratites Bed of Rikuzen, . Anisic-Skytic 



Fossils found in these beds are : 



In the Ceratites Bed of Eikuzen ; Ceratites (ffollandites) japoni- 

 cus V. Mojs., C. liaradai v. Mojs., Joponites planiplicatus v. Mojs., 

 Danuhites naumanni v. Mojs., Gymnites loatanahei v. Mojs., etc. 



In the Daonella Bed of Sakawa ; Daonella sakaioana v. Mojs., 

 D. liotoi V. Mnjs., Arpadites sakaioanus v. Mojs., etc. 



In the Pseudomonotis Bed of Sakawa ; Pseudomonotis ochotica Kay- 

 serl. var. densistriata, Tell., Ceratites sakawanus v. Mojs., etc. 



In the Plant Bed of Yamanoi ; Cladophlehis, Dictyophyllum, 

 Podozamites, Nilssonia, Baiera, etc. 



(2) Jurassic System. 



The System consists of marine deposits as in Nagato and Tango 

 in the Inner Zone, Iwaki and Eikuzen in the Outer Zone, and of 

 brackish-water deposits as in Echizen, Etchti, Echigo, etc. in the Inner 

 Zone. The Jurassic deposits of Japan may be correlated as follows : 



