56 NEW YORK STATE MUSEUM 



f label lites is very common among the specimens. The trilobite from 

 Webster lake is a Dalmanites." 



We have large collections of fossils from this sandstone on Lake Telos, 

 Webster lake, etc., which were not seen by Mr Billings, and have not yet 

 been determined. There are many genera among them not mentioned in 

 the preceding list. 



We need say no more respecting this Oriskany sandstone of Maine 

 now, except to refer to its representation upon the map, extending from 

 Parlin Pond to the Aroostook river in a general northeasterly course, and 

 to the special details of the character and position of the rocks in Part II. 



On later pages of this work, details of stratigraphy are given which it 

 is not necessary here to quote as it has been the effort to revisit the 

 majority of Hitchcock's localities for the purpose of the present investiga- 

 tions. It is interesting to note, however, Hitchcock's conclusions after a 

 study of several sections in regard to the strike and dip of these beds ; he 

 says [p.4O2] speaking of the section along the east branch of the Penobscot 

 river, near Matagamon lake : " It is difficult to ascertain the true position 

 of this rock but we consider the following as the normal one : strike north 

 65 west ; dip 45 north. The same layers are traversed by cleavage planes 

 running north 18 east and inclined 83 east." This section evidently indi- 

 cates a local departure from the attitude of the rock strata as a whole and 

 some conception of the dislocation of these rocks is afforded by the series 

 of variant dips recorded by Hitchcock on page 406, thus: "Just above 

 Webster lake dam, the strata dip about 20 easterly. Then we soon pass 

 an anticlinal as the next observation gives a westerly dip of 30 while the 

 cleavage planes dip 75 southeast. Before reaching the west end of the 

 lake the following are the positions of the strata in order : 5 east, 6 to 12 

 east, 20 west and 30 northwest, making two anticlinal and one synclinal axis 

 on the lake." Evidence of similar character as to the folding of the strata is 

 afforded by the dips and strikes recorded in the sections given herewith. 



In a paper entitled "Geology of the Northwest Part of Maine" by Pro- 

 fessor Hitchcock and J. H. Huntington [Am. Ass'n Adv. Sci. Proc. 1873] 

 and in Hitchcock's final summary of the Geology of Maine accompanying 

 his map of 1885, the known data in regard to the Oriskany sandstone have 

 been summarized as follows : 



