TERTIARY DEPOSITS. 
247 
braced in the description of the Long-island division. I would adopt the names by which 
the equivalent strata in New-Jersey, Delaware and Virginia, have been described; but that 
the names would be less descriptive of the composition and characters of the strata, than the 
Long-island division will be for other portions of the country, where equivalent formations 
occur. Again, should subsequent investigations prove that I have erred in assigning the 
lower formations of clay, sand, etc., exposed on Long island, to the upper division of the 
secondary deposits, and as equivalent in age to the sands, clays and marls of the cretaceous 
and lower green marls, and lower clays of New-Jersey, the term Long-island division will 
still he appropriate, and the descriptions true. 
