on " Limestone Belts of Westchester County," in which he very
explicitly and intimately determined the limits of the Kingsbridge
limestone on Manhattan Island.
1885, A. Lindenkohl, " Geology of the Sea-Bottom in the Approaches to
New York Bay," American Journal of Science, Third Series, Vol. 29, p.
475, describes submerged channel of the Hudson River over the Coastal
1887, Professor J. F. Kemp read his admirable and conspicuously
pre-eminent contribution before the New York Academy of Sciences under
the title " The Geology of Manhattan Island."
1890, Professor F. I. H. Merrill discussed, in the American Journal of
Science, the " Metamorphic Strata of Southeastern New York," which, in
1896, was succeeded by a paper, somewhat skeletonized, on the same
subject, and a longer paper on the "Origin of Serpentine," both
published in New York State Museum Report of that year.
1895, Professor J. F. Kemp read before the New York Academy of Sciences
a short paper, entitled " The Geological Section of the East River at
70th Street, New York," which was important as offering partial proof
that the bed of the East River was cut in dolomite rock.
the February number (1899) of the American Geologist.Mr. E. C. Eckel
published his article on " Intrusives in the Inwood Limestone of
1900, Professor A. A. Julien read before the New York Academy of
Sciences a paper, entitled " Notes on the Origin of the Pegmatites from
Manhattan Island," an epitome of which can be found in Science, Vol.
xii (1900), p. 1006.
1901, Dr. Wallace Goold Levison published his descriptive pamphlet, "
Crystals of Chrysoberyl From the Borough of Manhattan," with figures
(enlarged from the original by photography). This comprised two finds.
1901, D. H. Newland, " The Serpentines of Manhattan Island and Vicinity
and Their Accompanying Minerals," urges the eruptive origin of t.'e
Staten Island serpentine. School of Mines Quarterly, Vol. xxii, pp. 307
1902, Professor William H. Hobbs read before the New York Academy of
Sciences his paper, " The Geology of the River Channels in the Vicinity
of New York," in which he contended that Manhattan Island is an
orographic block outlined by faults or rectilinear displacements. (See
Science, for Dec. 5, 1902, Vol, xvi, No. 414.)