147 



Cora. 



Corals in Niagara limestone^ Yh, at Lockport, N. Y. Lower 



VI ^S^^^^^^^^^^^^^^^^^^a^^ beds 



nital 

 Lime- 

 stone^ 

 No. 1, of 

 Hall's 

 section) 

 wholly 

 made 

 up of 

 broken 

 & worn 

 stone s 

 & plates 

 of Gary- 

 OGvinus 

 ornatus 



Fragments of ETicrinital columns in Limestone, ^ other 



corallines, weathering in relief. Hall, page 90, fig. 26. — In 

 Pennsylvania, corals of obscure structure abound in some of 

 the finer grained '' wormeaten " Irenton limestone of the inte- 

 rior valleys. (T, p. 57.) See H. D. Eogers' section at Belle- 

 fonte, Centre Co., Pa., beds e, g, h, j, k. (T, 56.) He. — In 

 the Lower Helderlerg^ (VI) coral reefs are abundant along the 

 Pike & Monroe outcrop, in the lower beds (G6, p. 133); in the 

 Stormville beds (G6, p. 134, 199, 219, 230, 244, 268) the same 

 coral reef horizon has extensive outcrops in the Danville- 

 Selinsgrove region, as at Appleman's quarry, Chillis, t., North- 

 umberland Co. (G7, p. 334); and so west through Middle 

 Pennsylvania, in Huntingdon Co., Powell's quarry. Cove Sta- 

 tion, 35' to 50' beneath the Oriskany (T3, p. 123); in Bastard 

 limestone., 44 of Coffee Run section, small branching coral, 

 especially Ghmtetes and Cladopora (p. 172); very abundant in 

 McConnellstown cliffs (p. 201); in Juniata Sand Co.'s quarry 

 cliff on Mill Cr. Corals of other forms than Favosites and 

 Zaphrentis., occur among masses of Stromatoporidoe. (p. 269.) 

 In Bedford Co. corallines abound in the cherty beds of K/, in 

 Martin's ridge near State line (T2, p. 159). In Blair Co. corals 

 are absent from lower, but abound in upper beds of VL, (T, 



