Name credited to M.L. Fuller. Occurs on eastern end of Long Island. Older than Harbor Hill moraine and followed Vineyard interval of uplift and erosion. Assigned to early Wisconsinan.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Ronkonkoma substage used. Early part of Wisconsin stage of Mississippi Valley is represented on Long Island by Harbor Hill or inner moraine (0 to 30 ft thick) and associated till and outwash and Ronkonkoma or outer moraine (0 to 150 ft thick) and associated till and outwash. The substage is the time during which Ronkonkoma moraine was deposited.
Source: GNU records (USGS DDS-6; Reston GNULEX).
Deposits on Long Island, NY, previously referred to as Ronkonkoma moraine, here renamed Ronkonkoma drift.
Source: GNU records (USGS DDS-6; Reston GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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