46 NEW YORK STATE MUSEUM 



abandonment of the Grand Gorge outlet, the waters of the lake in 

 the Schoharie valley found their next lower escape at an elevation 

 of about 1 2 10 feet to Catskill creek through the col 2 miles north of 

 Franklinton. North of Broome Center, in the valley of Keyser kill, 

 a splendid series of hanging deltas at various levels was built into a 

 lake whose waters dropped through several stages down to the level 

 of the Grand Gorge outlet. 



PALEONTOLOGY 



The Museum. Reference has been made to the installation of a 

 group displaying the fauna of the Portage epoch rehabilitated with 

 its organic parts. The success of this group is so striking and its 

 purpose so satisfactorily accomplished that it is planned to present 

 from time to time other rehabilitations of the several extinct faunas 

 of our older rocks. 



The general systematic collections in paleontology having been 

 fully installed, an additional effort has been made to facilitate its 

 interpretation and educational worth. This has partly been done by 

 installing a case carrying the legend, What is a fossil? In this is 

 skilfully arranged a display of the various modes of fossilization, or 

 preservation of fossils, with full explanatory labels, so that the 

 student finds herein a complete visual introduction to this phase of 

 paleontology. This work has been very successfully done by 

 Winifred Goldring. 



Investigations. Doctor Ruedemann has continued his study of 

 the Utica and Lorraine formations of the Mohawk and Black River 

 valleys. Further study of sections of the Utica shale added more 

 details to the establishment of three horizons in the Utica shale, 

 while continued careful study of the section of the Lorraine gulf and 

 the elaboration of the collections from our Lorraine beds brought 

 out the fact that the Lorraine formation of New York consists of 

 two distinct divisions, the lower Lorraine, corresponding to the 

 Eden of the Ohio valley, and the upper Lorraine, corresponding to a 

 part at least of the Maysville of the western Cincinnatian. Alto- 

 gether we have been able to distinguish eight life zones in the Lorraine 

 formation of New York, the first three of which correspond respec- 

 tively to the Economy, Southgate and McMicken zones of the Eden, 

 the first or Fulton zone of the Eden being represented by the black 

 shale that underlies the lower Lorraine. Zone 4 shows relationship 

 to the Mount Hope beds of the Maysville, Zone 5a to the Fairmount 

 and Zones 56-8 to the Bellevue beds of the Maysville. 



The finding of many new species as well as of many forms hitherto 



