Figure 26. Schematic maps and cross sections of the Jordan Pond valley from late-glacial time until the present. Cross sections (left-hand diagrams) are drawn from top to bottom through the map views (right-hand diagrams).


A. 14,000 years ago. A continental glacier covered the entire region. Glacial plucking removed bedrock blocks from hillsides.


B. 12,500 years ago. The continental glacier had receded from the area, leaving only a tongue of ice in the Jordan Pond valley. The ocean covered the depressed land surface. Debris carried by the ice formed the Jordan Pond moraine and a delta. Marine clays were deposited on the ocean floor.


C. 11,000 years ago. The ice had completely disappeared from the Jordan Pond valley. The moraine at the southern end of the valley formed a natural dam for Jordan Pond. Sea level continued to drop and the delta began to emerge.


D. 10,000 years ago. The rebound of the land surface caused the sea to recede from the area.


E. 2,000 years ago to present. Rising sea level has once again inundated part of the area, and modern beach deposits are being created. The Jordon Pond House was built on top of the moraine. The surficial units are shown here as they appear on the surficial map.



Last updated on February 22, 2006.