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.
The western foothills of the Sierra Nevada Range, defining Californiaâs eastern border, are known as the Gold Country, named after the rich Mother Lode discovered here in the mid-1850s. While gold is still found in the region, new riches include top museums and art in Sacramento, the state capital, plus whitewater rafting, tucked-away towns, farm-fresh dining, and award-winning wines.