SMITHSONIAN CONTRIBUTIONS TO KNOWLEDGE— SHERZER. 



PLATE XL 



Fu;. I. — Line of contact between two "dirt zones," Lefroy Glacier. These zones repre- 

 sent ontcropping edges of depositional strata. 



Aberdeen. 



Fig. 2. — 'Dirt zuncb upon Ltiiuy Ulacici, ln..iutiul> niuUiseil witli ■ dut hands" of l-orbes. Compare figure 2, 



plate XVI. 



