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.
Tumbleweed in Antelope Canyon. Did you know that the upper canyon is sometimes called all of the following names: Slot Canyon, Wind Cave, Grotto Cave or âThe Crack.â It was first discovered in 1931 by a young Navajo girl who was herding sheep in the area.Photo #22 by Brent Pearson.pper Antelope Canyon is at about 4,000 feet elevation. It is the most popular of the two canyons since the upper has a fairly flat ground which requires no climbing.