In adjoining portion of eastern NY, used as Hatch Hill Formation of Late Cambrian age. [Not shown in MA.]
Source: GNU records (USGS DDS-6; Reston GNULEX).
Used as Hatch Hill Formation of Late Cambrian and Early Ordovician age [no explanation given for age change; therefore, none made to unit summary record]. Occurs in Taconic allochthon sequence in Glens Falls quad. Overlies Cambrian West Castleton Formation; underlies Ordovician Poultney Formation.
Source: GNU records (USGS DDS-6; Reston GNULEX).
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