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  • Thumbnail for Cretaceous–Paleogene extinction event
    sediment called the K–Pg boundary or K–T boundary, which can be found throughout the world in marine and terrestrial rocks. The boundary clay shows unusually...
    170 KB (18,697 words) - 21:16, 1 June 2024
  • Thumbnail for Chicxulub crater
    Chicxulub crater (category Cretaceous–Paleogene boundary)
    the impact coincides with the Cretaceous–Paleogene boundary (commonly known as the K–Pg or K–T boundary). It is now widely accepted that the devastation...
    82 KB (8,126 words) - 20:25, 17 June 2024
  • Thumbnail for Outer space
    physical boundary, with the air pressure steadily decreasing with altitude until it mixes with the solar wind. Various definitions for a practical boundary have...
    135 KB (13,374 words) - 09:30, 18 June 2024
  • In the United Kingdom, the boundary commissions are non-departmental public bodies responsible for determining the boundaries of parliamentary constituencies...
    25 KB (2,690 words) - 14:26, 22 April 2024
  • Thumbnail for Manifold
    with boundary. A ball (sphere plus interior) is a 3-manifold with boundary. Its boundary is a sphere, a 2-manifold. (Do not confuse with Boundary (topology))...
    68 KB (9,507 words) - 06:13, 28 May 2024
  • Thumbnail for Canada–United States border
    border is the longest international border in the world. The boundary (including boundaries in the Great Lakes, Atlantic, and Pacific coasts) is 8,891 km...
    81 KB (8,868 words) - 14:40, 12 June 2024
  • Thumbnail for Cretaceous
    are: The lower boundary of the Cretaceous is currently undefined, and the Jurassic–Cretaceous boundary is currently the only system boundary to lack a defined...
    91 KB (9,487 words) - 14:30, 14 June 2024
  • Thumbnail for Asia
    well as forming the international boundary between Russia and the United States. This national and continental boundary separates the Diomede Islands in...
    130 KB (11,684 words) - 01:49, 13 June 2024
  • Thumbnail for Convergent boundary
    A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide. One plate eventually slides...
    20 KB (2,381 words) - 05:34, 23 May 2024
  • Thumbnail for Border
    Borders are usually defined as geographical boundaries, imposed either by features such as oceans and terrain, or by political entities such as governments...
    53 KB (5,693 words) - 11:26, 9 June 2024
  • Thumbnail for Constituencies of the Parliament of the United Kingdom
    from 646 to 650 at the 2010 general election after proposals made by the boundary commissions for England, Wales, and Northern Ireland (the Fifth Periodic...
    114 KB (739 words) - 01:39, 30 May 2024
  • Thumbnail for City of London
    area referred to as London has since grown far beyond the City of London boundary. The City is now only a small part of the metropolis of Greater London...
    132 KB (11,993 words) - 10:35, 16 June 2024
  • Thumbnail for Territorial dispute
    A territorial dispute or boundary dispute is a disagreement over the possession or control of territories (land, water or airspace) between two or more...
    9 KB (943 words) - 09:58, 14 June 2024
  • Thumbnail for Plate tectonics
    Where the plates meet, their relative motion determines the type of plate boundary (or fault): convergent, divergent, or transform. The relative movement...
    112 KB (13,612 words) - 11:58, 16 June 2024
  • the boundary. If the ball hits the ground before hitting or passing the boundary, then four runs are scored. If the ball passes or hits the boundary without...
    12 KB (1,713 words) - 01:03, 11 February 2024
  • Thumbnail for Boundaries between the continents
    Determining the boundaries between the continents is generally a matter of geographical convention. Several slightly different conventions are in use....
    98 KB (10,995 words) - 15:45, 4 June 2024
  • Thumbnail for Cambrian
    Ediacaran and early Cambrian led to the development of new convergent plate boundaries and continental-margin arc magmatism along its margins that helped drive...
    84 KB (9,033 words) - 23:03, 17 June 2024
  • Thumbnail for Mason–Dixon line
    Mason–Dixon line (category Cultural boundaries)
    the southern Pennsylvania border, later became informally known as the boundary between the Southern slave states and Northern free states. This usage...
    50 KB (5,738 words) - 06:23, 17 April 2024
  • Thumbnail for Transform fault
    A transform fault or transform boundary, is a fault along a plate boundary where the motion is predominantly horizontal. It ends abruptly where it connects...
    13 KB (1,691 words) - 02:02, 18 June 2024
  • Thumbnail for Boundary value problem
    equations, a boundary-value problem is a differential equation subjected to constraints called boundary conditions. A solution to a boundary value problem...
    9 KB (1,037 words) - 07:27, 29 January 2024
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