[Various (1971)] This fact, already remarked for the narrow point users of the middle and upper Hudson Valley, can be extended to include the substitution of Onondaga and Normanskill flints for rhyolite in the manufacture of the "broad points" of the Susquehanna tradition in central and eastern New York (Ritchie 1965a: 153, 156, 161); the change from the prevalence of argillite to the exclusive use of flint by the makers of the Fox Creek points (Funk 1968; n.d.), formerly termed Steubenville points (Ritchie 1961: 50-52) in the same areas; the occurrence of argillite points of a wide range of form, culture and time, in the Delaware Valley and elsewhere; and the indisputable fact that at such major quarry-workshop sites as Flint Mine Hill, near Coxsackie in Greene County (Parker 1924; Ritchie 1965a: 8), and Diver's Lake in Genesee County (Ritchie 1965a: 8, 182) point types made from these distinctive flints range from Clovis through most of the recognized categories to the Madison type of the Iroquois (Ritchie 1961). In the upper Hudson Valley area another culture of the narrow point tradition, the River phase, succeeded the Sylvan Lake complex which is just barely represented in the next deeper stratum at the Bent site, Schenectady County, the key station of the River phase (Ritchie 1965a: 124-130; Ritchie and Funk n.d.a).