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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.
Tell Barri, northeastern Syria, from the west; this is 32 meters (105 feet) high, and its base covers 37 hectares (91 acres) Tel Be'er Sheva, Beersheva, Israel. In archaeology, a tell (from Arabic: تَلّ, tall, 'mound' or 'small hill') [1] is an artificial topographical feature, a mound [a] consisting of the accumulated and stratified debris of a succession of consecutive settlements at the ...
Debris flows tend to move in a series of pulses, or discrete surges, wherein each pulse or surge has a distinctive head, body and tail. A debris flow in Ladakh, triggered by storms in 2010. It has poor sorting and levees. Steep source catchment is visible in background. Debris-flow deposits are readily recognizable in the field.
First phase of the Tethys Ocean's forming: the (first) Tethys Sea starts dividing Pangaea into two supercontinents, Laurasia and Gondwana.. The Tethys Ocean (/ ˈ t iː θ ɪ s, ˈ t ɛ-/ TEETH-iss, TETH-; Greek: Τηθύς Tēthús), also called the Tethys Sea or the Neo-Tethys, was a prehistoric ocean during much of the Mesozoic Era and early-mid Cenozoic Era.
the development of histic and spodic palaeosols, fossil soils which are typical of a tropical humid climate with more water entering through precipitation than leaving through evapotranspiration; hygrophytic palynological (fossil pollen) assemblages that reflect vegetation more adapted to a humid climate; the widespread presence of amber. [36]
The levels of the lakes dropped through evaporation, while changes in worldwide hydrology caused global sea levels to rise. [8] [9] The rising Mediterranean finally spilled over a rocky sill at the Bosporus. The event flooded 100,000 km 2 (39,000 sq mi) of land and significantly expanded the Black Sea shoreline to the north and west.
The qanats were excavated through water-bearing sandstone rock, which seeps into the channel, with water collected in a basin behind a small dam at the end. The width is approximately 60 cm (24 in), but the height ranges from 5 to 9 meters; it is likely that the qanat was deepened to enhance seepage when the water table dropped (as is also seen ...
This debris, along with what is known as the Shackleton fracture zone, has been shown in a recent study to be fairly young, only about 8 million years old. [104] The study concludes that the Drake Passage would be free to allow significant deep water flow by around 31 Ma.