192 E. W. Berry — Carboniferous Plants from Peru. 



Massive greenish-grey somewhat arkosic sandstone 15 



Thin-bedded sandstone 10 



Thin-bedded sandstone with dark shale (no coal) toward the 



top (tunnel in shale) 32 



Alternating sandy and carbonaceous shale with 6 inch coal 



at top, abundantly fossiliferous (tunnel) 38 



Massive greenish-gray somewhat arkosic sandstone 20 



Shale carbonaceous above, sandy below (N. 20 E, 25 E) (tun- 

 nel) 10 



Greenish-gray sandstone, thin-bedded above 5 



Gray shale 2 



Interbedded thin sandstones and shales 3 



Shale 1 



Gray arkosic sandstone 5 



Sandy shale 18 



Thin-bedded sandstone and sandy shale with more massive 



sandstone at base 70 



Dark carbonaceous shale with 2 to 3 inches of coal at top, 



abundantly fossiliferous (N. 5 , 25 E) (tunnel) 18 



Massive greenish sandstone 15 



Sandy shale 13 



Pleistocene 585 



Section repeated by faulting to the southwest. 



The materials are relatively coarse throughout and 

 would seem to indicate rapid deposition. Between 53 and 

 54 per cent of the total thickness is described as sand- 

 stone, which is often coarse and arkosic. Of the 273 feet 

 described as shale 192 feet are distinctly sandy, so that less 

 than 14% of the total thickness, including the so-called 

 coal seams, is fine-grained shale and even the coal con- 

 tains much silty impurities. No underclays with rootlets, 

 or upright stems were observed and the coaly layers have 

 every appearance of having been formed of drift material, 

 which also appears to have been the case in the probably 

 contemporaneous and very similar continental Carbon- 

 iferous examined on the Copocabanya Peninsula on Lake 

 Titicaca in Bolivia. 



The Flora. 

 The flora comprises the following forms :. 



Pteridophytes or Pteridospermophytes. 



1 Palmatopteris furcata (Brongn.) 



2 Eremopteris whitei Berry. 



3 Eremopteris peruianus Berry. 



