"Did you know that the Bay Area was created out of something called a drowned river valley? Do you know the history of how Treasure Island was created out of nothing in the 1930s? A fun new video explains this and more. Geoff Gibson, the geography maven behind the YouTube channel Geography by Geoff, takes a special look at the Bay Area this week."
"Gibson begins by discussing the unique geography of the Bay, and how it was formed, not by faultline, but by rising seas after the last ice age, out of what's called a drowned river valley. The same phenomenon created the Chesapeake Bay on the East Coast, and can also be called a ria, and San Francisco Bay is ria in that it remains open to the Pacific Ocean."
San Francisco Bay formed as a drowned river valley (ria) when rising seas after the last ice age flooded an existing river system rather than through faulting. The same process formed Chesapeake Bay. The bay remains open to the Pacific Ocean. Treasure Island was created in the 1930s as an artificial island. Mount Diablo's peak in the East Bay has one of the largest viewsheds in the western United States, enabling views of Mount Whitney on clear days and sightlines to parts of 40 of California's 58 counties. Several surprising local geographic facts arise from these origins.
Read at sfist.com
Unable to calculate read time
Collection
[
|
...
]