100 



Report of the State Geologist. 



sandstones of tlie White quarry, northeast of EarlviHe. Fossils are abun- 

 dant, mainly small forms, although Spwifer granulosus (Con.), Hall, is 

 common. The small Lamellibranchs are the abundant and characteristic 

 fossils of this zone, especially the NuculidcB and species of similar habitat, and 

 the locality is w ell known to some collectors of Hamilton fossils. 



The gorge in Kingsley's brook at Randalls ville, four miles above Earl- 

 viHe, is another excellent locality for collecting. The rocks are blocky, 

 moderately coarse arenaceous shales, which form cliffs twenty-five to thirty 

 feet high along the brook. Fossils are common, especially Amhoco'lia umbo- 

 nata (Con.), Hall, and Liorhynchus multicosta, Hall, while in the finer shales 

 Spirifer mucronahts (Con.), Bill., is abundant. 



Smyrna. 



Three and one-half miles southwest of Earlville is the village of Smyrna, 

 in Smyrna township, which is in the northern tier of townships of Chenango 

 county. The upper part of the Hamilton formation is well exposed in the 

 brooks near Smyrna, especially along Pleasant brook from the village north- 

 westerly. 



In drawing the line of separation between the Hamilton and Portage 

 formations in central New York, Smyrna township is an important region 

 since it embraces the easternmost extension of the Tully limestone. To 

 the east of this township and the Chenango valley, the calcareous conditions 

 of deposition disappeared and the horizon of the Tully limestone is repre- 

 sented by shales or argillaceous sandstones. Vanuxem, in 1842, mentioned 

 the occurrence of the Tully limestone in "the northwestern part of Smyrna," 1 

 and stated that it had "not been seen beyond the town of Smyrna in an east 

 direction." 2 Prosser, in 1 X87, recorded its presence and thickness near Upper- 

 ville, on the south side of Pleasant brook, about two miles northwest of 

 Smyrna village. 3 At this locality the Limestone is capped by twenty feet of 

 black, argillaceous shales of the Genesee. In the same year, Professor S. G. 

 Williams published a paper on the "Tully limestone, its distribution and its 

 known fossils," in which this locality is described, 4 and the map accompanying 

 the report showing "The geographical distribution of the Tully limestone in 

 central New York," indicates the eastern end of the Tully limestone at this 

 locality. 5 



1 Geology of New York, Pari III, p. 292. 

 » I/Ad., p. 164 



1 Proceed ingii American Association Advancement of Science. Vol. XXXVI, \>. 210. 

 4 Sixth Annual Keport State Geologint | New York] for die year lHWi, p. 18. 

 6 Ibid., map being p. 28. 



