IV 



TABLE OF CONTENTS. 



Shawmut Group in Newbury .... 

 Shawmut Group in the Marblehead Region 

 Shawmut Group in the Lynn and Medford Region 

 Shawmut Group in Brighton, Newton, and Needham . 

 Shawmut Group in Dedham, Hyde Park, Dorchester, and Milton 

 Shawmut Group in the South Shore District 

 General Relations of the Shawmut Group 



Paleozoic Formations ..... 

 Primordial 



Boston Basin ..... 

 Stratigraphy of the Boston Basin 

 South Shore District 

 Quincy and Milton 



The Hyde Park, Mattapan, and Squantum Belt . 

 The West Roxbury and Dorchester Synclinal 

 The Brookline and Roxbury Conglomerate Belt . 

 The Upper Falls, Chestnut Hill, and Boston Slate Belt . 

 The Conglomerate Bordering the Newton Lower Falls and 



Brighton Band of Amygdaloid . . . . , 



Conglomerate and Slate in Needham and South Natick 



The Broad Slate Belt, between the Boston & Albany Railroad 



and the Crystallines of Waltham, Arlington, Medford, and 



Maiden 



Nahant 



Marblehead Neck 



Volume of the Conglomerate and Slate . . . . 

 Relations of the Conglomerate and Slate to the Crystallines 



Basin of the River Parker . " . 



Mineralogical Notes . . . . • . . . 



Pinite . . . . . 



Kaolinite 



Devonian ? ..,........'. 



Carboniferous . . . . . . . . . ' . 



Supplementary Note ........... 



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