WOODWORTH: GEOLOGICAL EXPEDITION TO BRAZIL AND CHILE. 63 
West from Sengéns on the north of the Rio Jaguaricatu in one of 
the deep cuts along the ascending grade striated stones were first 
found in Brazil. The bed exposed at this locality is a typical tillite, 
containing large subrounded masses of a whitish rock resembling the 
ja 
White 
Sand Stone 
Fig. 13.— Section along the railway showing white novaculitic sandstone 
bed under tillite bed. 
white, fine, silicious sandstone from near the base of the Permian 
section. 
This occurrence of the fine white sandstone in the boulder-beds from 
Sao Paulo southward in close association with the preglacial stratum 
of the same character is strong evidence of the eastern derivation 
of the erratics. 
Conglomerates at Ponta Grossa: — Overlying the trap-invaded fossili- 
ferous Devonian shales which underlie the “big point” between 
Fic. 14.— Section of Permian conglomerate beds in vicinity of Ponta 
Grossa, Parané. 
streams on which the city of Ponta Grossa stands, there are to be 
seen on the northwest of the town near the base of the Permo-Car- 
boniferous series, at least two beds of waterworn conglomerate (Fig. 
14) interpolated in a thick sandstone series. These waterworn 
pebbles present in themselves no evidence of glacial origin or trans- 
portation. The lower pebble bed, from four to five feet thick, is made 
up of subangular to well rounded, waterworn, light-colored sandstone 
pebbles from .5 inch to 6 inches in diameter. Rarely larger cobble- 
