225 
PHYSICAL AND FAUNAL EVOLUTION 
z 
a) 
& 
o 
110 100 90 Yo WE 
% a 
i 
Ne $i Yi, 
Le 
52 
LENS WW 
Fig. 7.—Paleogeographic map at the end of Chazy time and the probable currents. 
M, Ozark Island, the remains of Mississippia T., Taconic Island. 
