GEOLOGICAL SURVEY 
R W.BROCK, Director, 
7 MypUts' 
s7r xx '<Z-Z’/A cS-7 ■ ^ 
^ .,-• <fr '*'/? O •'.7 V" / 7?-^ 
/ 
(^yc^e^€> f^cs*r? 
72 ~i-2 ?/x Z-cd7 XzZZ 
y^zZyT- s-yz zZrf~ /^Zyisz*~z--'z. ^ y^z^'i y^yt-C-. — yyyyyTyy 
/ ^ 7y ^- y~u ZL yy^-zt-z^zZ ^a -w; 
(y 
• ( ^ *£- ■v'Z- XlZZT^Zy-^? '-*^'7+ <Mzt*Z 
Zc-r^sf' /*£ a^ 
'/£S^nyvsJ 
1 -oz«y—' 
4 
U £-^h~ £ 
^77^X7 
*-C-t-^> Z7TZ /X~ZO i'^x-i,^ 7<XuzS-z^iT—y "p 
Xt i i y7~ < ^X~f’ i >y 2-z v 
^ a 
L/ 7f, 
^>> 7 c y z/^ 7 
