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See this sign in context.
Red Rock Pass
You are standing in the outlet of
ancient Lake Bonneville. A vast
prehistoric inland sea, of which
Salt Lake is a modern remnant.
Covering over 20,000 square miles when it
overflowed here about 14,500 years ago, its
winding shoreline would have stretched from here
to New Orleans if it were straightened out. This
pass was deepened considerably when Lake
Bonneville began to flow into Snake River. For
a time, a torrent several times larger than the
Amazon was discharged here. Finally, with
a hotter, drier climate that slowly emerged
about 8,000 years ago, Lake Bonneville
gradually disappeared.
This sign is found along a route which has been photographed for inclusion in
the UntraveledRoad virtual world. To see and follow the route this sign
is on, click on its image.
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In Bannock County:
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