6 NEW YORK STATE MUSEUM 



quadrangle from the east is less pronounced than in the central 

 part of the State. Both of these facts have led to the obscuration 

 of the stratigraphy of the region. 



The rocks of Buffalo abound in fossils often of the most inter- 

 esting character. These have been cited here under their respec- 

 tive formation names, but for fuller accounts of the species with 

 analytic illustrations the student must refer to the volumes of 

 the Palaeontology of New York. 



In the preparation of this map the territory has been carefully 

 resurveyed by D. Dana Luther, field assistant on the geologist's 

 staff. In this work he has had the assistance of Prof. Irving P. 

 Bishop of Buffalo, who several years ago at the solicitation of the 

 State Paleontologist prepared a map of the quadrangle giving the 

 boundary lines of the formations with their broader and earlier 

 value. Much previous work has been done in the same field. 

 Professor Bishop prepared and published in the 15th Annual 

 Report of the State Geologist a special account with a map of the 

 structural and economic geology of Erie county, at a date when a 

 detailed topographic map was not available. In 1901 Prof. A. W. 

 Grabau prepared and published a map and descriptive account of 

 the northern part of this- region in State Museum bulletin 45, 

 A Guide to the Geology and Paleontology of Niagara Falls and Vicinity, 

 but it has been possible since then to trace the stratigraphic bound- 

 aries in much 'more refinement of detail. The reader may find it 

 desirable to refer to both of these publications ; the latter especially 

 for a summary account of the fossils in the northern formations of 

 the region. Professor Grabau has also published in the i6th 

 Annual Report of the State Geologist and as a bulletin of the 

 Buffalo Society of Natural Sciences, volume 6, a full descriptive 

 account of the formations and fossils in the rocks exposed at 

 Eighteen Mile creek, and Professor Bishop has supplemented his 

 original report on Erie county with more recent notes on the gas 

 wells and production of the region, in the 17th and 19th reports 

 of the State Geologist. 



John M. Clarke 



State Geologist 



