Pg. 277-278. Eagle Bridge quartzite. Compact, gray, granular sandstone, in places dolomitic, that weathers dark and somewhat rusty. Thickness 10 to 30 feet. Underlies Deepkill shale with apparent conformity. Conformably overlies black shale of Schodack formation, and 0.5 mile southeast of Post Corners it overlies thin beds of fossiliferous limestone of Schodack formation. Its stratigraphic position below slate that carries Beekmantown graptolites and above Lower Cambrian limestone indicates that it is probably Lower Cambrian.
Is well exposed in vicinity of village of Eagle Bridge, on Hoosic [Hoosick] River, Washington Co., NY. [Named from Eagle Bridge.]

Source: US geologic names lexicon (USGS Bull. 896, p. 649); supplemental information (in brackets) from GNU records (USGS DDS-6; Reston GNULEX).

The age of the Eagle Bridge quartzite is changed from Early Cambrian to Late Cambrian and Early Ordovician, based on fossils (echinoderm stems).

Source: GNU records (USGS DDS-6; Reston GNULEX).

The lithology and stratigraphic sequence of the Eagle Bridge Quartzite indicates it is equivalent to the Hatch Hill Quartzite in the Taconic region. Author states the causes of confusion over this unit and lists other equivalent units in the northern and southern Taconic region.

Source: GNU records (USGS DDS-6; Reston GNULEX).

Revised the Eagle Bridge to the Eagle Bridge Member of the Hatch Formation and geographically extended the Eagle Bridge to west-central VT. The age of the Eagle Bridge is shown as Late Cambrian.

Source: GNU records (USGS DDS-6; Reston GNULEX).