U.S. GEOLOGICAL SURVEY 



MONOGRAPH !X . PLATE \XX 



(»_..• •.««■ i . ' ■'\ 





i 



10 



11 



V 



"^'■ 11 '■■ \m . Ill 



*-/ 



19 



C 



15 



16 



18 



% 



LA.D. and RPV/ del 



T Sincla-u- * Sor. Ph-Jc 



LAM ELLI BRANCH I ATA . 



EOCENE-UPPER LAYER OE UPPER MARLS.) 



