Lake Merrimack

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Lake Merrimack was a glacial lake that formed during the late Pleistocene epoch. After the Laurentide ice sheet retreated, glacial ice melt accumulated at the terminal moraine and blocked up the Merrimack River, creating the narrow lake. The lake extended from Manchester to Plymouth, New Hampshire. It is unknown when the lake was drained.

Lake Hitchcock is an important part of the geology of New Hampshire. It experienced annual layering of sediments, or varves: silt and sand in the summertime (due to glacial meltwater) and clay in the wintertime (as the lake froze).

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    Pleistocene proglacial lakes and related seas
    Africa
    Asia
    Europe
    North America
    Nelson River Drainage
    James Bay Drainage
    Great Lakes
    Columbia River System
    Upper Missouri River
    • Glacial Lake Circle
    • Glacial Lake Cut Bank
    • Glacial Lake Glendive
    • Lake Great Falls
    • Glacial Lake Jordan
    • Glacial Lake Musselshell
    Upper Mississippi Drainage
    Ohio Drainage
    Hudson valley
    New England
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