Geoscience Reference
In-Depth Information
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f igu r e 18. Map of the distribution of enormous late Pleistocene lakes, including Lake
Bonneville in Utah and Lake Lahontan in western Nevada. Modern lakes discussed in the
text are also shown, as well as the Cordilleran ice sheet over western Canada that extends into
northern Washington, Idaho, and Montana. Arrows show the paths of ancient “megal oods”
from Lake Missoula in Montana through the Columbia River into Washington, and from
Lake Bonneville into southern Idaho. (Map drawn by B. Lynn Ingram and Wenbo Yang.)
