Since the publication of the report of Emmons on the geology of the second district of New York, the northern and western portions of the Adirondack region have received little more than casual mention in geologic literature. This is even more markedly true than in the case of the eastern counties, though little enough has been done there until quite recently.
Having spent some time in the contiguous portions of Saint Lawrence, Jefferson and Lewis counties,, the writer has ascertained certain facts which may be taken as a starting point for an inquiry into the geologic relations of the region. Although but little more than a beginning has been made, it seems expedient to present some of these facts with the conclusions drawn from them, particularly to establish a basis of comparison between the phenomena exhibited in different portions of the Adirondack region. With this end in view it . . .