THE GEOLOGY OF THE SYRACUSE QUADRANGLE 1/ 



and surfaces where these crystals have been leached out give the 

 rock a vermicular texture similar to that of the vermicular limestone 

 in the Camillus group. 



Good exposures of the entire thickness of the Rondout are not 

 frequent in the Syracuse quadrangle, because it is in general less 

 durable than the overlying Manlius and Onondaga limestones which 

 form cliffs and their fragments form talus slopes covering the 

 Rondout. The best exposure on the quadrangle is in the ravine 

 south of Chrysler's station on the Auburn electric line, where nearly 

 every layer at this horizon is exposed. There is a good exposure 

 along the electric line between Dunlop station and the penitentiary 

 near Jamesville. This is on the northern margin of the Tully quad- 

 rangle. Other exposures near Syracuse are at Kimber springs on 

 the west side of Onondaga valley (Tully quadrangle) and several 

 places along the escarpment between Jamesville and Manlius. 



The Rondout limestone is not used commercially at Syracuse, 

 except locally for road ballast or rough building stone, because it is 

 inferior to the overlying limestones as a waterlime, quicklime, or 

 building stone. 



MANLIUS LIMESTONE 



The name Manlius was first used by Vanuxem 1 in 1842 as the 

 " Waterlime group of Manlius," apparently including under this 

 term the waterlimes of the underlying Bertie and Camillus groups. 

 The name subsequently gave way to Tentaculite limestone until it 

 was revived by Clarke and Schuchert 2 in 1899. In the type locality 

 at Manlius, Hartnagel 3 gives a total thickness for the Manlius of 

 yy feet from the upper waterlime bed at the top to the Rondout, 

 into which the Manlius grades without any sharp line of separation. 

 This conception differs somewhat from that of Schuchert 4 and 

 from that of Harris. 5 The difference seems to be in the delimita- 

 tions at the top and base. There is still some question as to whether 

 the Manlius properly terminates with the upper waterlime or should 

 include the overlying Stromatopora layer and some of the accom- 

 panying blue limestone and, if so, how much. As the waterlimes 

 are persistent and quite uniform in character in the Syracuse region, 



iGeol. N. Y., Third District, 1842, p. 1 10-16. 



2 Science, 10 1874-78, 1899. 



3 N. Y. State Mus. Bui. 69, Rep't of State Pal. 1902, p. 1165. 



4 On the Manlius Formation of N. Y. Schuchert. Am. Geol., March 1903, 

 p. 160. 



5 American Paleontology. Bui. 19. Ithaca, N. Y. 1904. 



