Hotspot (geology)
This page is about the geologic term. For other uses, see
Hotspot. In
geology, a hotspot is a location on the Earth's surface that has experienced active
volcanism for a long period of time.
J. Tuzo Wilson came up with the idea in 1963 that volcanic chains like the
Hawaiian Islands result from the slow movement of a
tectonic plate across a "fixed" hot spot deep beneath the surface of the planet. Hotspots are thought to be caused by a narrow stream of
hot mantle convecting up from the mantle-core boundary called a
mantle plume [1], although some geologists prefer upper-mantle convection as a cause
[2] [3] [4]. This in turn has re-raised the antipodal pair impact hypothesis, the idea that pairs of opposite hot spots may result from the impact of a large meteor.
[5] Geologists have identified some 40–50 such hotspots around the globe, with
Hawaii,
Réunion,
Yellowstone,
Galápagos, and
Iceland overlying the most currently active.
See more at Wikipedia.org...
Point chaud
Hot-Spot (Geologie)
Plama goraca
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