U. S. GEOLOGICAL SURVEY. 



WINDSOR 



ROWE CHESTER SAVOY SCHIST 



SCHIST. AMPHIBOUITE. 



WORTHINGTON. 



Sea Level 



MIDDLEFIELD. 



CHESTER. 



AMPHIBOLITE. 



Vll. SERPENTINE. 



Sea Level: 



ilMMMl 



CHESTER. 



^.:riilMMi 



Sea 



ROWE CHESTER SAVOY 



SCHIST. AMPHIBOLITE. SCHIST. 



SECTIONS ALONi 



