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Theia (/ ˈ θ iː ə /) is a hypothesized ancient planet in the early Solar System which, according to the giant-impact hypothesis, collided with the early Earth around 4.5 billion years ago, with some of the resulting ejected debris coalescing to form the Moon.
The Perserschutt photographed in 1866, just after the first excavation was completed. The famous Kritios Boy appears on the right.. The Perserschutt (lit. ' Persian rubble ' or ' Persian debris '), as it is called in the German language, is the collection of ancient votive and architectural sculptures that belonged to the Acropolis of Athens before being destroyed during the second Persian ...
A closeup of a shell midden in Santa Cruz Province, Argentina. A midden [a] is an old dump for domestic waste. [1] It may consist of animal bones, human excrement, botanical material, mollusc shells, potsherds, lithics (especially debitage), and other artifacts and ecofacts associated with past human occupation.
This is an accepted version of this page This is the latest accepted revision, reviewed on 14 February 2025. Alleged Earth satellite of extraterrestrial origin For the British rocket program, see Black Knight (rocket). 1998 NASA photo of space debris, an object believed by some conspiracy theorists to be an extraterrestrial satellite, the Black Knight GIF of the six images taken of the space ...
Using a mechanical excavator is the quickest method to remove soil and debris and to prepare the surface for excavation by hand, taking care to avoid damaging archaeological deposits by accident or to make it difficult to identify later precisely where finds were located. [21]
Debris flow channel with deposits left after 2010 storms in Ladakh, NW Indian Himalaya. Coarse bouldery levees form the channel sides. Poorly sorted rocks lie on the channel floor. Debris flow in Saint-Julien-Mont-Denis, France, July 2013 Scars formed by debris flow in Ventura, greater Los Angeles during the winter of 1983. The photograph was ...
Lobate debris aprons (LDAs) are geological features on Mars, first seen by the Viking Orbiters, consisting of piles of rock debris below cliffs. [ 1 ] [ 2 ] These features have a convex topography and a gentle slope from cliffs or escarpments , which suggest flow away from the steep source cliff.
Nuʻuanu Slide is seen near the center top in this bathymetry image of the Hawaiian archipelago, Nuʻuanu Slide or Nuʻuanu Debris Avalanche is the largest of seventeen known submarine landslides around the Hawaiian Islands and at 200 kilometers (124 mi) in length, one of the largest landslides on Earth.