136 NEW YORK STATE MUSEUM 



division of the formation. These terms however useful locally must have 

 a very restricted value in view of the rapidity of change of sediment in the 

 oscillating coast line which received these deposits. While such divisions 

 are practicable, I think we can not yet safely speak of a Lower Oriskany and 

 Upper Oriskany, even in the face of certain paleontological differences 

 indicated by Shimer in the Port Jervis section, the most effective of which 

 is the presence of the trilobite Dalmanites dent at us in the lower 

 zone only. In my memoir of 1900 [p-77] I expressed the view from the 

 information then available, that the fauna of the D. dentatus zone 

 was Helderberg (Port Ewen) age. I am prepared now to withdraw this 

 view and recognize this zone as a proper part of the Oriskany section in 

 accordance with the suggestion of Dr Barrett and the propositions of 

 Messrs Weller and Shimer. 



Oriskany section at Highland Mills. In order to bring together the 

 composition of the Oriskany fauna as a whole as known in eastern New 

 York outcrops, occasion is taken at this point to discuss the Pine Hill 

 section at Highland Mills, Orange co. 



This section lies along the new grade of the Erie Railroad just north of 

 Highland Mills station 1 and extends somewhat beyond Woodbury Falls 

 station. The succession here is a quite regular but somewhat faulted series 

 constituting the eastern limb of a syncline which bends down beneath the 

 Skunnemunk mountain at the west and comes up on the western slope of 

 that mountain with loss or change of some minor details. Pine Hill is that 

 part of the section constituting the hill just east of the Erie Railroad, which 

 is bounded on both east, north and west sides by branches of the Wood- 

 bury creek which are confluent branches of the Moodna creek. The course 

 of the hill has the general course of the strike of the rocks, ne.-sw. The 

 lowest member of the series is the Cambric which lies or is faulted against 

 the crystallines at the east, and the entire series on this limb of the syncline 



'The section was first observed by Mr H. C. Wardell who has measured it with care 

 and has collected freely of its fossils. This was possible during the construction of the 

 road but with the completion of the cut access to the rocks has been effectively suspended. 



