Sanctuary
Quiz
Correct!
Stellwagen
Bank was formed by the same geological forces that created the
outer portion of Cape Cod -- the advance and retreat of the
last great ice sheet. This Laurentide Ice Sheet was divided
into several lobes, two of which are important in this region.
The Cape Cod Bay Lobe and the Great South Channel Lobe melted
and retreated at different rates, the Bay lobe moving out first
and the Channel lobe taking a longer time and depositing its
land fragments on the sea floor (and building up what is now
Stellwagen Bank). The process of retreat is estimated to have
occured from 18,000 to 15,000 years ago.
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