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| | Squam Swamp (Site not responding. Last check: 2007-10-24) |
 | | As the last glacier advanced from the north approximately 15,000 years ago, it moved small rocks, large boulders, sand, and clay ahead of it. |
 | | This material was deposited along the glacier’s southernmost edge, forming a moraine that is now visible as the weathered, gently rolling hills (kames) and valleys (kettles) that make up the northern portion of the island. |
 | | By contrast, the southern half of Nantucket is relatively flat and consists of the finer, sandy material that was laid down in an outwash plain by glacial melt waters flowing to the sea. |
| www.nantucketconservation.com /info_files/properties/squamf.html (2404 words) |
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