654 Report of the State Geologist. 



XL VI C 1 . Medium to thin bedded calcareous sandstone. Layers 

 irregular. To canal level. Calciferous sandrock. 



C 2 . Heavy bedded, massive arenaceous limestone 



C 3 . Mostly covered. Steel grey arenaceous limestone, containing 

 flint and calcite. 



C\ Dove-colored, very compact, even bedded limestone with flat Ji , = 1 F 5 g 

 conchoidal fracture, and weathering ash white. This rock contains abundant 

 examples of Plnjiop-ii-s tulmloxa and rests upon buff arenaceous limestone. 

 Birdseye limestone. 



Feet 

 52 = 52 



Feet 



23 = 75 



Feet 

 80 = 155 



C 5 . In the large quarry, just east of the small creek that empties 



Feet 



165 



into the canal, a few rods east of the cut, is exposed dark bluish-black, mas- 

 sive, fine grained limestone, which weathers lig-ht and contains Black river 

 c(»rals. Black river limestone. 



C 6 . About 200 yards east of the creek is a large quarry in which 9^74 

 the basal layers are thick, even bedded and somewhat crystalline, and weather 

 light bluish-grey. They contain Rafinesquina alt&rnata and other Trenton 

 fossils. Base of Trenton. 



C 1 . Above the heavy layers of C 6 are thin, irregular, dark blue 12 F 2 e m 

 layers abounding in fossils. 



C s . Base of Utica. In the bed of the creek, near the highway, 148 F 1' '\ iU 

 black, even bedded, calcareous shale. The difference in altitude between this 

 point and the top of the hill, just to the south, is 148 feet. Utica slate. 



At the railroad cut, where Nos. 1 and 2 of the above section are exposed, 

 the rocks of No. 1 exhibit a rather abrupt bending of the layers. Near the 

 eastern end of the cut is a nearly vertical line, east of which the dip is ten 

 degrees east, and west of which the dip is one degree west, or nearly normal. 

 This section furnishes the best outcrop of the Birdseye limestone to be found 

 anywhere in this region. At this place the Birdseye presents the characters 

 so typical of it along the northern branches of the Mohaw k river to the north- 

 west. It is dove-colored, impalpably tine grained, with flat conchoidal fracture, 

 smooth vertical joint faces; and weathers ash white with a delicate bluish 

 tint. The peculiar plant-like reticulations of Phytopsis tubulosa are very 

 conspicuous in the rock at this locality, since they weather buff, whereas the 

 rock matrix weathers nearly white. The vertical columns, the extremities of 

 which give the '"birdseye" appearance to the surfaces of the layers, are larger 

 than in t lie rock of this subformation near Newport and Little Falls, where 

 they are quite small and composed of calcite. w hile in the Birdseye of the 

 lower Mohawk they are composed of argillaceous material. Within the 



