REPORT OF THE DIRECTOR I9II 2^ 



outcrops of a black argillaceous shale, the Cornwall shale, carrying 

 a Hamilton fauna. In New Jersey this grit forms a narrow belt 

 parallel to the outcrops of the Longwood shale (Siluric), but sep- 

 arated from it by the Decker Ferry limestone which has been corre- 

 lated by Hartnagel and others with the Wilbur limestone and the 

 Rosendale cement beds of the upper part of the Salina of New 

 York. The base of the grit has not been observed in New Jersey, 

 and although its outcrops are nowhere far removed from the prob- 

 able occurrence of the Decker Ferry limestone, there is always a 

 concealed interval between them, so that the beds immediately sub- 

 jacent are unknown. 



On the basis of a small fauna found by Weller at two localities, 

 one in the coarser beds and the other in the finer and upper layers, 

 the formation was' referred by the authors cited to the Onondaga, 

 although some previous workers (Merrill, Darton and others) had 

 regarded it as Oriskany. It is the lowest Devonic formation recog- 

 nized in the New Jersey portion of the Green Pond area. Owing 

 to a ruling by the board of geologic names of the United States 

 Geological Survey, this formation has been called the Kanouse sand- 

 stone in several of the recent geologic folios. 



The formations which immediately underlie the Kanouse (New- 

 foundland) sandstone of the New Jersey area are well exposed in 

 a relatively new section at Highland Mills, New York. This section 

 described by Clarke^ is from the base upward as follows: (i) thin- 

 bedded sandstones (Port Ewen beds?) 55 feet; (2) heavy-bedded 

 sandstone (Oriskany) 13 feet; (3) thin-bedded blue sandstone, 14 

 feet; (4) heavy-bedded sandstone lighter in color and becoming 

 coarser upward, 230 feet (these beds represent the Esopus and 

 Schoharie grits). The highest beds exposed at Highland Mills are 

 a few feet of thick-bedded white quartzite and conglomerate exactly 

 like the basal beds of the Kanouse sandstone as exposed at New- 

 foundland, New Jersey and west of the southern end of Greenwood 

 lake, and as the latter have been referred to the Onondaga as 

 determined by Weller, the uppermost beds of the Highland Mills 

 section may be so regarded.^ 



1 Clarke, J. M., N. Y. State Museum Memoir 9, pt. 2, p. 137. 



~ While the Onondaga limestone stage may be represented in the Kanouse 

 sandstone, it seems a nearer expression of the exact relations that the 

 Kanouse sandstone be regarded as the expression of the coarsely clastic 

 earlier deposits of the Onondagan division, that is, a near equivalent to 

 the Schoharie grits. J. M. C, 



