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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.
Mt. Cayley massif, south aspect. The volcano resides in the middle of a north–south trending zone of volcanism called the Mount Cayley volcanic field. [3] It consists predominantly of volcanoes that formed subglacially during the Late Pleistocene age, such as Pali Dome, Slag Hill, Ring Mountain and Ember Ridge, but activity continued at Pali Dome and Slag Hill into the Holocene epoch.
Freston is a causewayed enclosure, [5] a form of earthwork that was built in northwestern Europe in the early Neolithic period. [6] [7] Causewayed enclosures are areas that are fully or partially enclosed by ditches interrupted by gaps, or causeways, of unexcavated ground, often with earthworks and palisades in some combination. [8]
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 ...
These include debris flows and turbidite flows. Porosities can be very high when preserved from diagenesis by early hydrocarbon charge. However, when these hydrocarbons are produced, diagenesis and compaction can restart which has led to several metres of subsidence at seabed, the collapse of a number of wells, and some extremely expensive ...
Commonly called mudslides, these dangerous torrents are usually referred to by geologists and first responders as debris flows, which the U.S. Geological Survey describes as fast-moving landslides ...
The temple's façade is typical, with a trilithon entrance, a bench and orthostats. It has a wide forecourt with a retaining wall, through which a passage runs through the middle of the building. [59] This entrance passage and first court follow the common, though considerably modified, Maltese megalithic design. [60]
Blanks are the starting point of a lithic reduction process, and during prehistoric times were often transported or traded for later refinement at another location. Blanks might be stones or cobbles, just as natural processes have left them, or might be quarried pieces, or flakes that are debitage from making another piece. Whatever their ...