REPORT OF THE STATE PALEONTOLOGIST 1901 549 



There are exposed here 52 feet of hard, quartzose, fine grained 

 and thin bedded layers, which however have become consoli- 

 dated into compact banks averaging 2 to 3 feet in thickness. 

 The thin bedding is indicated by the rapid alternation of darker 

 greenish gray with lighter colored bands. These heavy banks 

 are separated by extremely tenuous partings of carbonaceous 

 shale, which are often densely covered with graptolites, 

 mostly specimens of Phyllograptus. The graptolite layers of 

 the quarry beds are, on the diagram, designated by heavier 

 lines and the letter p. They constitute graptoUte bed 5. By 

 erogenic disturbances which have affected this region the 

 blocks have been slipped along many of the partings and the 

 organisms destroyed. In the silicious layers only worm tubes 

 were noticed. 



q Here ends the practically continuous section of the lower 

 and middle graptolite zones, and for a distance of about 825 

 feet (figure obtained by pacing) no further exposures could be 

 found. 



r Then follows the large but temporary exposure afforded by 

 the cutting into the north bank of the creek for the purpose of 

 securing the north end of the dam. The length of this section 

 was 135 feet. The prevailing rock of the exposure was green- 

 ish gray quartzite, similar to that of the quarry beds, but less 

 compact and softer, with some brecciated layers and several 

 thin bands of gray limestone interbedded with the greenish 

 rocks. All these strata were however contorted in the manner 

 mentioned before. 



Two graptolite beds were found in this part of the section. 

 The first (bed 6), 39 feet from the west end of the cut, forms 

 the nucleus of a narrow steep fold consisting of 6 feet of a 

 compact mud rock. As the bed is folded on itself, the actual 

 thickness of the layer is 3 feet. 30 feet farther east 2 feet of a 

 soft black graptolite shale were found (graptoUte bed 7). On 

 account of the disturbed position of the beds, the exact dis- 

 tance between the graptolite beds and the total thickness of 

 the beds exposed could not be ascertained satisfactorily. The 



