WooDwoRTH. — Geological Expedition to Brazil and Chile 



PLATE 24. 



Ice-rafted boulder and stones in shales near Rio Negro, Santa Catharina. 

 Same locality as Plate 23. This shale underlies the earthy bed shown in Plate 

 23, and contains near bottom of view a 1.5 inch band of the same material. 

 Surface shows the herbaceous growth of the open lands between forested 

 tracts. The boulder is a gneiss. Page 68. 



