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.
Tehachapi Pass is a mountain pass crossing the Tehachapi Mountains in Kern County, California in the United States.Traditionally, the pass marks the northeast end of the Tehachapis and the south end of the Sierra Nevada range. The route is a principal connector between the San Joaquin Valley and the Mojave Desert.ehachapi Pass is a mountain pass crossing the Tehachapi Mountains in Kern County, California in the United States.