﻿i4 Bulletin 19 64 



South-east of Manlius, from Evergreen lake southward for a 

 mile or more one sees fine exposures of the upper beds of the 

 Manlius, and in many places their line of contact with the Onon- 

 daga. 



Section about % mile S. W. of Evergreen lake 



Ft. Thick 



1 . Onondaga limestone various 



2. Heavy blue layer 1.2 



3. Solid layers, weathering into thin parallel layers 8.0 



4. Blue limestone, Stromatoporoid in upper portion 22.0 



5. Cement rock. 4.0 



6. Blue rock 4.0 



7. Cement rock 4.0 



8. Solid, blue in general, but with bands of yellow ; with 

 Leperditia 3.0 



9. Heavy blue layers, very Stromatoporoid above and some- 

 what below .' 20.0 



Extensive quarries 1 y 2 mile S. E. of Dewitt show very plainly 

 the relation of the Rondout stage of the Manlius to the Coble- 

 skill and Salina beds below. 



Section of quarry iy 2 mile S. E. of Dewitt. 



Ft. Thick 



1. Rondout limestone; cavities and chert below; grading into 

 Cobleskill beds 20.0 



2. Cobleskill Stromatopora layers 5.0 



3. Gray, shaly limestone ilo 



4. Gray shale 1.2 



5. Gray shaly limestone 3.0 



6. Hard, brown dirt 1.5 



7. Gypsum 35.0 



Special points to be noticed in the Manlius area. — (1) The fos- 

 siliferous (brachiopod) portion of the Manlius begins with 

 beds containing large numbers of Sp. vanuxemi, and this follows a 

 Eurypterus fauna. (2)Here a change takes place. Sometimes the 

 brown-weathering crystalline limestones, with great numbers of 

 crinoidal and other fragments, come immediately upon the Spiri- 

 fer zone. Often however, a gasteropod bed some two feet in 

 thickness is interposed. Stropheodonta varistriata is the dominat- 

 ing species in most of these beds. Spirifer vanuxemi is com- 



