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  2. Border - Wikipedia

    en.wikipedia.org/wiki/Border

    A relic border is a former boundary, which may no longer be a legal boundary at all. However, the former presence of the boundary can still be seen in the landscape. For instance, the boundary between East and West Germany is no longer an international boundary, but it can still be seen because of historical markers on the landscape; it remains ...

  3. Plate tectonics - Wikipedia

    en.wikipedia.org/wiki/Plate_tectonics

    Three types of plate boundaries exist, characterized by the way the plates move relative to each other. They are associated with different types of surface phenomena. The different types of plate boundaries are: Divergent boundary. Divergent boundaries (constructive boundaries or extensional boundaries). These are where two plates slide apart ...

  4. Boundaries between the continents - Wikipedia

    en.wikipedia.org/wiki/Boundaries_between_the...

    The continental boundaries are considered to be within the very narrow land connections joining the continents. The remaining boundaries concern the association of islands and archipelagos with specific continents, notably: the delineation between Africa, Asia, and Europe in the Mediterranean Sea; the delineation between Asia and Europe in the ...

  5. List of political and geographic borders - Wikipedia

    en.wikipedia.org/wiki/List_of_political_and...

    Boundaries. Below are separate lists of countries and dependencies with their land boundaries, and lists of which countries and dependencies border oceans and major seas. The first short section describes the borders or edges of continents and oceans/major seas. Disputed areas are not considered. Continents

  6. Boundary problem (spatial analysis) - Wikipedia

    en.wikipedia.org/wiki/Boundary_problem_(spatial...

    Boundary problem (spatial analysis) A boundary problem in analysis is a phenomenon in which geographical patterns are differentiated by the shape and arrangement of boundaries that are drawn for administrative or measurement purposes. The boundary problem occurs because of the loss of neighbors in analyses that depend on the values of the ...

  7. Spatial analysis - Wikipedia

    en.wikipedia.org/wiki/Spatial_analysis

    A boundary problem in analysis is a phenomenon in which geographical patterns are differentiated by the shape and arrangement of boundaries that are drawn for administrative or measurement purposes. The boundary problem occurs because of the loss of neighbors in analyses that depend on the values of the neighbors.

  8. Subduction - Wikipedia

    en.wikipedia.org/wiki/Subduction

    Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at convergent boundaries. Where the oceanic lithosphere of a tectonic plate converges with the less dense lithosphere of a second plate, the heavier plate dives beneath the second plate and sinks into the mantle.

  9. Divergent boundary - Wikipedia

    en.wikipedia.org/wiki/Divergent_boundary

    Divergent boundary. In plate tectonics, a divergent boundary or divergent plate boundary (also known as a constructive boundary or an extensional boundary) is a linear feature that exists between two tectonic plates that are moving away from each other. Divergent boundaries within continents initially produce rifts, which eventually become rift ...