Approximate Relation to known geologic Horizon.—The geologic position of the limestone and quartzite of the Rutland valley has lately been determined definitely,* the limestone paleontologically and the quartzite stratigraphically.
Occurring next below the limestone, the quartzite is the northern continuation of the Clarksburg-mountain quartzite, in Massachusetts, in which Walcott has found the Olenellus fauna characteristic of the Lower Cambrian horizon. About one mile north of Rutland village, in Vermont, Dr Wolf and Dr Foerste were fortunate enough to find Lower Cambrian fossils in a silicious limestone that lies superjacent to the quartzite. Northeast of Rutland the quartzite is found associated with a sandy phyllitic schist that belongs to a series of metamorphosed clastics having a vitreous quartzite or conglomerate at its base. This whole series, barring the Lower Cambrian quartzite and limestone, has been subjected to the most intense dynamic action. The sequence of the different members . . .