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Step-like geomorphology at the Putorana Plateau, which is a World Heritage Site.. The source of the Siberian Traps basaltic rock has been attributed to a mantle plume, which rose until it reached the bottom of the Earth's crust, producing volcanic eruptions through the Siberian Craton. [8]
The map of North America with the Western Interior Seaway during the Campanian. The Western Interior Seaway (also called the Cretaceous Seaway, the Niobraran Sea, the North American Inland Sea, or the Western Interior Sea) was a large inland sea that split the continent of North America into two landmasses for 34 million years.
The Calico Early Man Site is an archaeological site in an ancient Pleistocene lake located near Barstow in San Bernardino County in the central Mojave Desert of Southern California. This site is on and in late middle- Pleistocene fanglomerates (now-cemented alluvial debris flow deposits) known variously as the Calico Hills, the Yermo Hills, or ...
Inner Space Cavern (Also known as Laubach Cave) is a karst cave located in Georgetown, Texas. The cavern was formed by water passing through Edwards limestone . The cavern is estimated to be around 20–25 million years old but were only open to the surface since the late Pleistocene period 14,000–45,000 years ago.
In all cases the chief conditions required for debris flow initiation include the presence of slopes steeper than about 25 degrees, the availability of abundant loose sediment, soil, or weathered rock, and sufficient water to bring this loose material to a state of almost complete saturation (with all the pore space filled). Debris flows can be ...
Satellites are key artifacts in examining human encounters with space over time and the effect we leave through artificial objects. This list includes: Vanguard 1 - Launched in 1958, the manmade satellite Vanguard 1 and the upper stage of its launch rocket are the oldest still in orbit. Vanguard 1 lost communication in 1964 but had a few ...
The prehistoric village acquired drinking water through a rainwater harvesting system, consisting of carved channels [22] that fed several cisterns carved into the bedrock under the site, [23] which could hold at least 150 cubic metres (5,300 cu ft) of water.
The second step in the formation of Pangaea was the collision of Gondwana with Euramerica. By the middle of the Silurian, 430 Ma, Baltica had already collided with Laurentia, forming Euramerica, an event called the Caledonian orogeny. As Avalonia inched towards Laurentia, the seaway between them, a remnant of the Iapetus Ocean, was slowly ...