What is a spreading center in plate tectonics?
spreading centre, in oceanography and geology, the linear boundary between two diverging lithospheric plates on the ocean floor.
What is a spreading center example?
Spreading centers occur where two plates are moving away from each other, and deep cracks are opened through the crust. This lengthening of the crust allows magma from the upper mantle to rise to the surface and cool, commonly forming basalt. An excellent example is the Mid-Atlantic Ridge.
Which of the following explains a spreading center volcanism?
Spreading center volcanism occurs at the site of mid-oceanic ridges, where two plates diverge from one another. As the plates are pulled apart, hot asthenosphere rises upward to fill voids of the extended lithosphere.
Which of the following is also known as a spreading center?
Divergent boundaries are also called spreading centers, because seafloor spreading occurs at these boundaries.
What is an example of plate tectonics?
A single tectonic plate can have multiple types of plate boundaries with the other plates that surround it. For instance, the Pacific Plate, one of Earth’s largest tectonic plates, includes convergent, divergent, and transform plate boundaries. The movement of Earth’s tectonic plates shape the planet’s surface.
Which type plate boundary is associated with spreading center?
Divergent boundaries
Divergent boundaries. Divergent boundaries occur along spreading centers where plates are moving apart and new crust is created by magma pushing up from the mantle.
What is plate tectonics in simple words?
Definition of plate tectonics 1 : a theory in geology: the lithosphere of the earth is divided into a small number of plates which float on and travel independently over the mantle and much of the earth’s seismic activity occurs at the boundaries of these plates.
What is a spreading center in geology?
Seafloor spreading or Seafloor spread is a process that occurs at mid-ocean ridges, where new oceanic crust is formed through volcanic activity and then gradually moves away from the ridge.