82 



Report of the State Geologist. 



Hamilton group, but in its later manifestations assumes many characters of 

 the Chemung fauna. In the Chenango valley and eastward the upper portion 



PORTAGE GROuP -w> 



. , P 



<>t' the deposits of this age is represented by the Oneonta group with a very 

 sparse fauna and well characterized strata. In Chenango county they 

 replace the higher l>e<ls bearing the Ithaca fauna. 



