it was by erosion
The Chesapeake Bay is an estuary, as is the San Francisco Bay.
It is a natural feature of the area.
Based on Goode's Atlas (2010), the Sacramento River "empties" into the Sacramento - San Joaquin River - San Francisco Bay Estuary, then into San Francisco Bay and eventually into the Pacific Ocean.
some natural resources would be: gold, and something else
Nobody. Delta has a "direct" but has a technical stop
On many flights they do. Atlanta to Honolulu, San Francisco, Seattle and LAX all do for example.
Peggy W. Lehman has written: 'Phytoplankton species composition, size structure, and biomass and their possible effect on copepod food availability in the low salinity zone of the San Francisco Bay/Delta Estuary' -- subject(s): Aquatic ecology, Copepoda, Food chains (Ecology), Phytoplankton
San Francisco, San Mateo, and Coronado (which they call an island but is technically an isthmus)
There are about 10 miles between south San Francisco to San Francisco.
San Francisco San Francisco
The original Golden State Warriors team was from Philadelphia. They were located for a period of time in San Francisco, but their current arena is in Oakland.
5hr 16min to 5hr 42min San Francisco (SFO) to Honolulu (HNL) by a nonstop flight operated by American Airlines, Delta Air Lines, Hawaiian Airlines, Northwest Airlines, United Airlines or US Airways.