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A hotspot's position on the Earth's surface is independent of tectonic plate boundaries, and so hotspots may create a chain of volcanoes as the plates move above them. There are two hypotheses that attempt to explain their origins. One suggests that hotspots are due to mantle plumes that rise as thermal diapirs from the core–mantle boundary. [2]
There is an ongoing discussion about whether the hotspot is caused by a deep mantle plume or originates at a much shallower depth. [3] Recently, seismic tomography studies have found seismic wave speed anomalies under Iceland, consistent with a hot conduit 100 km (62 mi) across that extends to the lower mantle.
Ten hotspots were originally identified by Myer; [1] the current 36 used to cover more than 15.7% of all the land but have lost around 85% of their area. [8] This loss of habitat is why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area.
Hotspot ecosystems support high species diversity, numbers of individuals, or both, and are therefore important in maintaining margin-wide biodiversity and abundance. [9] HERMIONE research ranges from investigation of the ecosystems' dimensions, distribution, interconnection and functioning, to understanding the potential impacts of climate ...
The volcanism is caused by the African Plate moving slowly over a hotspot in the Earth's mantle. A hotspot (the Canary hotspot) is the explanation accepted by most geologists who study the Canary Islands. [34] [35] A relatively hot mantle plume associated with this hotspot is thought to be rising through the mantle under La Palma and El Hierro ...
The study of the causal relations of the phenomena present in a region; a comprehensive explanatory study of a region. [4] choropleth A map showing the distribution of a phenomenon by graded shading which indicates the density per unit area of that phenomenon; the darker the shading, the greater the density. [13] chott. Also shott and shatt.
He made significant contributions to the theory of plate tectonics, adding a concept of hot spots, hot region beneath the crust. Plate tectonics is the scientific theory that the rigid outer layers of the Earth ( crust and part of the upper mantle ), the lithosphere , is broken up into around 13 pieces or "plates" that move independently over ...
Pages in category "Hotspots (geology)" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. ...