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Correlation of the glacial deposits and interglacial stages in the Mississippi Valley with those 

 on Cape Cod and the New England Islands 



Stage 



Substage 



Deposit 



Location and character 



In Mississippi 

 Valley 



In New 

 England 











Wisconsin 

 (glacial) 



Falmouth 



[Clay] 

 Sand 

 Gravel 

 Till 



Offshore, under the sea? 

 In outwash plains 

 In outwash plains 

 In frontal moraine 



Wisconsin 



[Gravel] 



[Sand] 



[Clay] 



Laid down in advance of the ice; 

 covered or worked over in 

 Falmouth moraine 



(glacial) 



Nantucket 



[Clay] 

 Sand 

 Gravel 



[Till] 



Offshore, under the sea? 



Gravel and sand in outwash plains 



In frontal moraine 





[Gravel] 



[Sand] 



[Clay] 



Laid down in advance of the ice; 

 covered or worked over in ground 

 moraine 



Peorian 



(interglacial) 



Vineyard 

 (interglacial) 



Erosion 





Old valleys on Marthas Vineyard 



and Block Island 

 Widespread erosion on Nantucket 



and Cape Cod 



lowan 

 (glacial) 



Sangamon 

 (interglacial) 





Manhasset 

 (glacial) 



Hempstead 



[Clay] 

 Sand 



Offshore, under the sea? 

 Sparingly developed 



Illinois 

 (glacial) 



Gravel 



Strongly developed 



Montauk 



Till 



Boulder clay 





Herod 



Gravel 



Well developed 



Yarmouth 

 (interglacial) 



Jacob 



(transitional) 





Sand 



Well developed 



Gardiners 

 (interglacial) 



Marine 

 invasion 



Clay 



Stratified glacial blue clay in the 

 islands and possibly at Highland 

 Light, on Cape Cod 





Jameco 

 (glacial) 



(Unconform- 

 ity) 

 Moshup 



[Sand] 



[Gravel] 



Till 



Absent or in Jameco 

 Locally in Jameco 

 Boulder bed under clay 



Kansan 



(glacial) 



Gravel 



Sand 

 [Clay] 



Normal f acies of Jameco 



Local 



In lenses on Cape Cod 



Weathered and iron cemented 



boulder bed; supposed base of 



Jameco 



Aftonian 



(interglacial) 



Post-Mannetto 

 (interglacial) 



Erosion 





Unconformity in Gay Head section 

 and in Clay Head section on Block 

 Island 





Mannetto 

 (glacial) 





[Clay] 

 Sand 

 Gravel 

 Till? 



Strong folding at Gay Head and 

 Clay Head by glacial thrust; also 

 (?) on Nantucket. Deposition of 

 stony blue clay (till) in folds at 

 Gay Head, overlain by gravel 



Nebraskan 





Interval of 

 glacial reces- 

 sion and 

 marine in- 

 vasion 



Gravel 



Sand 

 [Clay] 

 Sand 

 Gravel 



The Weyquosque glacial gravel and 

 sand are regarded as the equiva- 

 lent of the Sankaty fossiliferous 

 marine sand on Nantucket and 

 under Cape Cod 



(glacial) 





First glacial 

 substage 



Till 



Dukes boulder bed (local) 





[Gravel] 



[Sand] 



[Clay] 



Deposits laid down prior to deposi- 

 tion of boulder bed were removed 

 in later changes 





Nonglacial 





Cemented 

 gravel 



Aquinnah conglomerate 



Basement of Cretaceous and Miocene strata. 



