BULLETIN OF THE GEOLOGICAL SOCIETY OF AMERICA 



Vol. 14, pp. 407-420, PL. 59 OCTOBER 19, 1903 



ORDOVICIAN SECTION NEAR BELLEFONTE, PENNSYLVANIA^ 



BY GEORGE LUCIUS COLLIE 



(^Presented before the Society January 2^ 1903) 



CONTENTS 



Page 



Introduction 407 



Position and thickness of the rocks 408 



Character of the rocks 409 



In general 409 



Group I. — Beekmantown stage 410 



Group II. — Stones River stage 411 



Group III. — Black River stage 411 



Group IV. — Trenton stage 411 



Group V. — Utica stage 412 



Group VI. — Lorraine stage 412 



The faunas and their relationships 412 



Utica and Lorraine shales 416 



Summary , 417 



Description of new species 418 



Brongniartia trentonensis (Simpson) 418 



Encrinurus tuberculosis sp. nov 418 



Riheiria parva sp. nov 419 



Liospira strigata sp. no v 419 



Proiowarthia tenuissima sp. nov 420 



' Prototvarthia rossi sp. nov 420 



Introduction 



During the summer of 1902 the writer made a collection of Ordovician 

 fossils in the neighborhood of Bellefonte, Pennsylvania, for purposes of 

 future comparison with faunas of like age in Wisconsin. 



Several interesting features were brought out during the study of the 

 Pennsylvania material, and a preliminary account of them is presented 

 in this paper. 



Bellefonte is the county seat of Center count}^ the geographical center 

 of the state, as the name indicates. The town lies in Nittany valley, a 

 denuded anticline, which affords exceptionally good exposures of the 



*The writer wishes to acknowledge his great indebtedness to Dr C. E. Beecher, of New Haven, 

 and Messrs E. O. Ulrich and Charles Schuchert, of Washington, for aid in the determination of 

 species and for many helpful suggestions. 



LVII— Bui-L. Geol. Soc. Am., Vol. 14, 1902 (407) 



