THE DEVONIAN SECTION NEAR ALTOONA, PA. 627 



which the lowest Chemung fossils are found, are here considered to 

 be Nunda. On the Pennsylvania Railroad this point is about 2^ 

 miles west of the Logan House, Altoona, in a cut near the beginning 

 of the curve at which, in going westward, the track turns into the 



Fig. 7 

 valley of Burgoon Run. In this cut is a thin band of sandstone, full 

 of Leiorhynchus Mesacostale and Productella lachrymosa, or a closely 

 allied form. Under the fossil-bearing band nearly 100 feet of rocks 

 are exposed, but no fossils could be found in them. On the New 

 Portage Railroad the lowest Chemung fossils found were the same 



