443 NEW YORK STATE MUSEUM 



A^ Partly covered. Heavy bedded massive, 

 very compact arenaceous limestone. Calciferous 

 sandrock. 6o'=i5o' 



A^ Covered with soil except at top. 6o'= 90' 



A^ Covered. Gravel and boulders at the mouth 

 of the Evakill. River level. 30'= 30' 



The following species were identified from the Black river (C o 1 - 

 umnaria) zone: 



1 Columnaria alveolata Goldfuss , (a) 



2 Monticulipora (Prasopora) lycoperdon Say? (r) 



3 PPhytopsis cellulosua Hall (a) 



4 Streptelasma profundum Hall (c) 



5 Rafinesquina altemata (Con.) Hall and Clarke (r) 



6 Murchisonia bellicincta Hall (r) 



7 Crinoid segments (c) 



This section presents a number of points of interest. The upper 

 part of no. 4 representing the fucoidal member of the Calciferous is 

 of unusually dark color and weathers nearly white. It abounds in 

 the so-called fucoidal markings. These layers are doubtless near the 

 top of the Calciferous stage both from considerations of dip which 

 would bring the Trenton due a few feet above them and from their 

 lithologic character. The rocks on Quarry hill present several 

 points of special interest. As one ascends the steep eastern slope 

 of the hill a gradual transition in the lithologic character of the 

 Calciferous sandrock, which is typical at the base of the hill, is 

 noticed, the layers at the top being thin^ finer grained, lumpy and 

 less arenaceous. The weathered escarpment of Calciferous appear- 

 ing at the southern end of the main escarpment of the hill does not 

 look different superficially from the Black river and Birdseye beds 

 which form the northern end of the escarpment. The Calciferous is 

 however arenaceous and lighter colored. Above the Calciferous and 

 forming as was stated the northern part of the escarpment or ledge 

 (for the superincumbent rocks have been for the most part re- 

 moved from the Calciferous at the southern part of the ledge) are 

 layers belonging to the Birdseye and Black river horizons. The 

 Birdseye at this point has a thickness of 2J feet. Just over the edge 

 of the hill in the northeastern part of the quarry the coral bearing 

 lumpy layers of Black river limestone are seen resting immediately 



