An abyssal plain is an underwater plain on the deep ocean floor, usually found at depths between 3000 and 6000 m. Lying generally between the foot of a continental rise and a mid-ocean ridge, abyssal plains cover more than 50% of the Earth âs surface. They are among the flattest, smoothest and least explored regions on Earth.
Jim Beckwourth. On this day in 1844, Jim Beckwourth discovered a path through the Sierra Nevada Mountains that now bear his name. Beckwourth Pass on U.S. Alt 40 between Reno, Nevada and Sacramento, California made overland travel to the gold fields of California. Tweet.
On January 24, 1848 James Marshall discovered gold at Sutter's Mill, touching off the California gold rush. On the 150th anniversary of Marshall's discovery, the Oakland Museum of California unveiled a series of exhibitions titled Gold Rush!California's Untold Stories.They are now closed at the Oakland Museum.ontact the Webmaster. On January 24, 1848 James Marshall discovered gold at Sutter's Mill, touching off the California gold rush. On the 150th anniversary of Marshall's discovery, the Oakland Museum of California unveiled a series of exhibitions titled Gold Rush! California's Untold Stories.