24 NEW YORK STATE MUSEUM 



Eight miles south of the above section and 1^4 miles north- 

 west-north of Lyons Falls station another excellent section is 

 shown along Mill creek where all the beds from the Precambric 

 to the Trenton are exposed. Mill creek is not properly placed 

 on the map here. Its true course is close to the town line be- 

 tween Turin and West Turin. By means of the hand level the 

 writer has determined the thickness of the Pamelia here to be 

 about 56 feet. The basal conglomerate, i foot thick, is followed 

 by 10 feet of gray, calcareous sandstones and very sandy lime- 

 stones with some sandy shale partings. Next come 4^ feet of 

 bluish black limestones. Above this the beds are much like 

 those along Roaring brook and their summit is here also capped 

 by a limestone conglomerate. 



Some 7 miles south of the Mill creek section and in the vicin- 

 ity of Denley there are good exposures of the Pamelia. No 

 complete section is visible but a study of all the outcrops makes 

 it certain that the formation is here not over 20 feet thick. The 

 basal conglomerate and sandstone underlies grayish, sandy, thick 

 bedded limestones, while the whole is capped by the usual lime- 

 stone conglomerate. The most southerly outcrops of Pamelia 

 occur along Mile creek from ^ to i mile above its mouth, where 

 the formation is apparently not over 10 or 12 feet thick. It dis- 

 appears before the Remsen quadrangle is reached. 



The thinning out to disappearance of the Pamelia in passing 

 southeasterly may be entirely explained as due to overlap, since 

 the formation came in from the west, as above shown, and rap- 

 idly thins out eastward. Its place of disappearance, most likely 

 in the northeastern corner of the Boonville quadrangle, is some 

 9 or 10 miles east of a north-south line passing through the 

 Roaring brook section where the Pamelia is over 71 feet thick. 

 This represents an eastward thinning of 7 or 8 feet per mile 

 which compares favorably wn'th the rate of thinning noted by 

 Gushing over the Theresa quadrangle. Of course, some of the 

 thinning may quite possibly be due to a lack of deposition of so 

 much material in the southern portion of the basin. It seems 

 certain that the Pamelia is present in considerable force, under 

 cover of later rocks, in the western part of the Port Leyden 

 quadrangle and to some extent, at least, in the northern part of 

 the Boonville quadrangle. In a letter Gushing says that what 

 has heretofore been referred to as Beekmantown-Lowville passage 

 beds in the region around Little Falls may in reality be a touch of 

 the Pamelia there. 



