THE SHOREWARD REGION 339 



at Clinton) of blue shale next above the oolitic bed at Lairdsville (1 : 87), 

 it is a safe hazard that the Wolcott is still included, but whether forming 

 the whole shale mass or onty the lower few feet up to the thin middle ore 

 found on Stebbins Creek (1:85) is uncertain; and whether the cal- 

 careous sandstone below the red-flux ore is Williamson or Brewerton can 

 be only conjectured, though the rumor of "guide Clinton graptolites" 

 somewhere in the upper beds (10:7, footnote) is reminiscent of the 

 former/ 



The Shoreward Eegion 



The section given by Hall (3 : 16) in the quarries on the hill south of 

 Utica and the better one on Swift Creek, near by, described by Vanuxem 

 (1:84-85), are fvmdamental, though because of certain unmeasured in- 

 tervals they appear but imperfectly on the chart. Beyond these comes 

 Steeles Creek, south of Ilion, and then the place Hall calls Tisdale's mill, 

 at both of Avliich (1 : 82, 81; 3 : 16) is a resistant sandstone, 60 to 70 feet 

 thick, known as the "upper gray band," forming the summit of the Clin- 

 ton. In the largely unique and mostly molluscan fauna of this mass 

 Trimerus delphinocephalus is the only definitely Eochester element, 

 whereas two of the other eight or ten species (3 : 100-105) are common to 

 the Brassfield of Ohio (13: 1481, 1487-1488). But Vanuxem says (1: 

 82) that Trimerus begins in the iron ores, and Hall (3 : 299) also reports 

 it far down in the Clinton. This sandstone continues unabated west 

 toward Moyers ("Myers," 1: 257) Creek, then suddenly drops out of the 

 sections. Five or six miles west of Moyers Creek, at Utica, the equally 

 thick mass of the Phoenix shales (here mostly sandstone) is at the Clinton 

 summit in the same relative position and carrying fucoids, as does the 

 gray band at AVick's store east of Tisdale's (1 : 81), where it also includes 

 shale. Were the ^^ray band" still present as a distinct member above the 

 Phoenix beds, it could scarcely fail to outcrop in the excellent section on 

 Swift Creek, and the conclusion is therefore drawn that this heavy white 

 stratum, which for convenience we will call the Herkimer sandstone, is 

 the strand facies of the Phoenix. (Schrocppel) shale, and so of some part 

 of the lower Irondequoit limestolie of the Eochester section, rather than, 

 as has been claimed, of the much attenuated Eochester shale of the Lake- 

 port well. We will recur to this question beyond. 



"^ A dififerent interpretation has been adopted in text-flgure 3, where the 6 feet of sand- 

 stone is identified as Brewerton and the underlying 15 feet of shale is all referred to 

 the Wolcott, the Williamson being shown as lapped out. This is the relation suggested 

 by the physical history as discussed beyond. 



