First used the Tuckerton Member of the Allentown Formation. Unit is lowest member of formation. Consists of gray dolomite to silty dolomite; usually thick bedded with interbedded limestone and particularly prominent cyclic algal and oolite beds near top; some sharpstone conglomerate; beds tend to be more calcareous and shaly toward base, and may be older than otherwise equivalent Conococheague Group. Underlies Muhlenberg Member.

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

Named as lower member of 3 of the Allentown Formation. The type locality is the village of Tuckerton in the south-central part of the Temple quadrangle, Berks Co., PA. "Predominantly medium-gray and light- to medium-dark-gray, magnesian and calcareous limestone and dolomite in 20-cm to 1-m beds". Calculated to be 150 to 180 m (500 to 600 ft) thick. Conformably overlies the Leithsville Formation; conformably underlies the Muhlenberg Member of the Allentown Formation. Assigned to Late Cambrian.

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

Adopted as Tuckerton Member of the Allentown Dolomite in southeast Lehigh and Berks Cos., PA. "Medium- to thick-bedded, light- to dark-medium-gray dolomite, magnesian limestone, and limestone. The limy beds typically have silty or shaly partings." Assigned to the Late Cambrian.

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