CHAPTER VIIL 



THE CLAYS OF THE CRETACEOUS 

 FORMATION. 



CONTENTS. 



The Marl series. 



The Clay Marl series. 



Clay Marl V — the Wenonah sand. 

 Clay Marl IV — the Marshalltown marl clay. 

 Clay Marl III — the Columbus sand. 

 Clay Marl II — the Woodbury clay. 

 Character. 



Localities where worked. 

 Clay Marl I — the Merchantville clay. 

 Character. 



Stratigraphic relations. 

 Localities where worked. 

 The Raritan Clay series. 

 Of Middlesex county. 

 Lignitic sandy clays. 

 Sand bed, No. 4 — Laminated sands. 

 The Amboy stoneware clay. 

 Sand bed, No. 3. 

 The South Amboy fire clay. 

 Sand bed, No. 2 — The "feldspar kaolin" sand. 

 The Woodbridge clay. 



The black, laminated clays. 

 The fire clay. 

 Intermediate beds. 

 Sand bed, No. 1 — fire sands. 

 The Raritan fire and potter's clay. 

 Southwest of Middlesex county. 

 Trenton clays. 

 Bordentown. 

 Florence. 

 Burlington. 

 Bridgeborough. 

 Pensauken creek. 

 Camden and southwest. 



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