" For 10 points, what event began when James W. Marshall found a certain substance at Sutter's Mill.
One effect of this event was the Bridge Gulch Massacre, which saw 150 Wintu natives killed by whites. A hurricane off the coast of the Carolinas sunk the SS Central America while it was returning from this event, partially causing the Panic of 1857. This event was a primary reason for the construction of the transcontinental railroad. This event caused waves of immigrants from both China and Latin America to migrate to the area known as the "Mother Lode." For 10 points, what event began when James W. Marshall found a certain substance at Sutter's Mill.
One effect of this event was the Bridge Gulch Massacre, which saw 150 Wintu natives killed by whites.
California Gold Rush 