Dublin Core
Title
North American Ice Sheets
Description
The geological Quatenary period, comprising about the past 2.58 million years, has been characterized by the expansion and contraction of ice sheets. This map shows the maximum extent of three major sheets emanating from their "ice centers": Keewatin Glacier (K); Cordilleran Glacier (C); and Labradorean or Laurentide Glacier (L). This last one flowed in two directions around the Adirondack Mountains, one south into the Champlain Valley and the other southwest into the St. Lawrence Valley. <br />
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Many distinctive features of New York state are the consequence of glacial advance and retreat, like the Finger Lakes, Long Island (itself a terminal moraine), Lake Ontario, and the palisades of Hudson River. Even picturesque boulders are glacial "erratics" carried many miles from their source.
Creator
Miller, Willliam
Publisher
New York State Museum
Date
1913-12-15
Contributor
Cooper, Ken
Source
Format
jpeg, 739 KB
Type
Still image
Still Image Item Type Metadata
Original Format
Map