geology in 1816. Amos Eaton had surveyed Rensselaer County, N. Y., and the route of the Erie Canal; further...1839 and under C. H. Hitchcock in 1868; the Rhode Island survey, also under Jackson, in 1839; and the...and unstratified, the latter including lavas and granite, which are "of igneous origin erupted from beneath...OF THE VERMONT STATE GEOLOGIST In Troy, Orleans County, titaniferous magnetite had been discovered in...analyzed by Olmsted. Scant attention is paid to granite which "forms a line of eruptions extending from |