PORTAGE AND NUNDA QUADRANGLES 45 



The first of these was accompanied by a perspective map (here 

 reproduced) of the Genesee river prepared by Eben N. Horsford, 

 assistant to Professor Hall and then a resident of Moscow.^ 



2 Palaeontology of New York, v. 5, 6, 8. 



In these volumes are descriptions of many of the fossils occur- 

 ring in the rocks of these quadrangles. 



3 The Higher Devonian Faunas of Ontario County, N. Y. John 



M. Clarke. U. S. Geol. Sur. Bui. 16. 1885. 

 Though chiefly concerned with the stratigraphy and paleontology 

 in a section further to the east this treatise applies to and in con- 

 siderable measure was based upon the Portage group of the Genesee 

 river. 



4 Faunas of the Upper Devonian, Genesee Section of New York! 



H. S. Williams. U. S. Geol. Sur. Bui. 41. 1888. 



5 Stratigraphic Value of the Portage Sandstones. D. D. Luther. 



N. Y. State Mus. Bui. 52. 1902. p. 616-32. 

 Traces the upper sandstones of the Upper Falls at Portage east- 

 ward and shows their continuity with the High Point sandstones 

 of Ontario county. In the same paper J. M. Clarke shows that 

 the fauna of this sedimentation unit is entirely different at the 

 east from that in the Genesee valley, at the former containing a 

 Chemung brachiopod assemblage, in the latter the typical Portage 

 fauna with cephalopods and lamellibranchs. 



6 Geologic conditions at the Site of the Proposed Dam and Stor- 



age Reservoir on the Genesee River at Portage. John M. 

 Clarke. An. Rep't State Engineer and Surveyor for 1896, p. 

 106-22. 



7 Naples Fauna in Western New York. John M. Clarke, pt 1. 



N. Y. State Geol. i6th An. Rep't. 1898; pt 2. N. Y. State 

 Mus. Mem. 6. 1903. 

 This work describes and illustrates the fauna of the Portage 

 group in its entirety, discusses its bionomic relations and elucidates 

 the stratigraphy of the formation. 



8 'Stratigraphy of the Portage Formation between the Genesee 



Valley and Lake Erie. D. D. Luther. N. Y. State Mus. Bui. 

 69. 1903. p. 1000-29. 



Mr Horsford, after serving as a teacher at Geneseo and at Albany, 

 became the distinguished Rumford professor of chemistry at Harvard Uni- 

 versity. The rocks and fossils of the Genesee valley have inspired other 

 men to distinction. Maj. John W. Powell, late director of the United 

 States Geological Survey was a native of Mount Morris, and the eminent 

 paleontologist Prof. O. C. Marsh was born on the richly fossiliferous rocks 

 crossing the lower Genesee and not far from its western boundary. 



