Fig. 1 . — Section 1 mile west 

 of Entrance Point, Rio 

 Santa Cruz. 



Fig. 2. — Section at Monte Leon, 

 from sea -lev el to tlie first 

 pampa. 



Tehuelche Pebble-Bed 

 and light sands. 



Pumiceous 

 mudstone. 



Alternate thin bands 

 of pumiceous mud- 

 stone and clay ; 

 two bands of Ostrea 

 ingens ; seams of 

 ferruginous sand- 

 stone, with verte- 

 brate remains. 



Thinly-bedded grits, 

 sandstones, and 

 mudstones, with 

 plant-remains. 



Hard gypseous mud- 

 stone, with Turritelja. 

 Shell-baud. 



Soft mudstone, with 

 Cancer patagonlca. 



