REPORT OF THE DIRECTOR I9O4 



*5 



specially in the hope that it may prove of use to the residents 

 of that city and vicinity. I reported last year that the work on 

 this map was essentially completed and have now to record that 

 the map is issuing from the press and constitutes Museum bul- 

 letin 82. 



Geology of the Schoharie region. In connection with the pre- 

 paration of a Guide to the Geology and Stratigraphy of the Scho- 

 harie Region, Prof. A. W. Grabau has prepared an areal map of 

 this region. I have previously referred to the fact that the Schoharie 

 creek is the classical ground of New York geology. It was here 

 that the Gebhards, father and son, labored before the organiza- 

 tion of the geological survey of 1836-42. The classification of 

 the rocks in the fine exposures along this creek was adopted by 

 the state geologists very much as it had been worked out by the 

 Gebhards. To the present time there has been no adequate 

 geologic map of the region. 



Professor Grabau's work in this region was not completed in 

 1903. His determinations have carried him in some measure 

 afield from the locality referred to in order to coordinate his re- 

 sults, and during the early part of the season he made some ex- 

 aminations in the country extending from the Indian Ladder to 

 Rosendale, Ulster co. Subsequently the Schoharie region was 

 reviewed with the object of determining certain points involv- 

 ing the genesis of the rock formations and their bearing upon 

 the paleogeography of the district. The Schoharie map and the 

 report to accompany it are now in course of publication. 



Cobleskill formation. Mr Hartnagel, who had previously re- 

 ported upon the extent and characters of this formation from 

 Ulster county west to Buffalo, has continued his investigations 

 farther to the southeast and to the New Jersey line. The de- 

 termination of this formation, which has heretofore been barely 

 recognized as a member of the New York series, has constituted 

 an important step forward in New York stratigraphy. Lying 

 near the border line of the great Siluric and Devonic series it 

 has required extremely cautious treatment and Mr Hartnagel's 

 investigations upon this theme have helped to throw light on the 

 extension of certain of our formations into New Jersey and have 

 indicated the equivalence of some of the New Jersey formations 

 with our own. 



The section he has studied with particular attention extends 

 from High Falls, Ulster co., southward through Sullivan and 

 Orange counties as far as the Nearpass quarry, which is a short 



