1 8 NEW YORK STATE MUSEUM 



Exposures. The black upper shales with large concretions 

 are exposed by the lake shore on the east side of the Lehigh Valley 

 Railroad 1% miles north of Levanna. Tlie Agoniatite limestone with 

 15 feet of black shale above it and the impure limestone layers below, 

 down to the Onondaga limestone, are finely displayed in the upper 

 part of the old Wood quarry a mile south of Union Springs and the 

 lower impure limestones in Wood's new quarry and the Smith quarry 

 I mile east of Union Springs also. 



The Agoniatite layer outcrops slightly by the roadside a mile east 

 of Half Acre and the black upper beds are displayed in the new rail- 

 road cut half a mile farther east. 



Marcellus shale crops out slightly in the bed of the stream % mile 

 north of Soule's cemetery on the Auburn Road (N. Y. C. & H. R. R. 

 R.) 35^ miles east of Auburn and 2 miles northeast of the city in 

 the bank of a small ravine that crosses the road leading from Grant 

 avenue to Franklin street. The large concretions are seen here. 

 The Agoniatite limestone and adjacent black shales outcrop ^4 ^^^ 

 from the east line of the quadrangle by the side of the third east and 

 west road from the north line of the quadrangle. 



Fossils. The lower shales contain : 



Orthoceras subulatum Hall Chonetes mucronatus Hall 



Styliolina fissurella (Hall) C. lepidus Hall 



Pleurotomaria rugulata Hall Orbiculoidea media Hall 



Liorhynchus limitire (Vamixem) Pterochaenia fragile {Hall) 



L. laura Billings Liopteria laevis {Hall) 



Strophalosia truncata Hall Nuculites oblongatus Conrad 



Ambocoelia umbonata (Conrad) Panenka ventricosa Hall 



A list of 28 species found in the Agoniatite limestone in Onondaga 

 and Schoharie counties may be found in State Museum Bulletin 

 49, but the stratum appears to be less fossiliferous here. Frag- 

 ments of the large cephalopod Agoniatites expansus 

 (Vanuxem) occur in this layer at Wood's old quarry. Union 

 Springs. 



Cardiff shale 



The Stafford limestone being absent from these quadrangles the 

 Marcellus shale is succeeded by about 50 feet of dark shale until 

 recently known as the upper Marcellus shale. In State Museum 

 Bulletin 63, published in 1904, this formation was designated by 



