Question

During the first half of the 20th century, the theory of plate tectonics was developed. Evidence supporting this theory included Wegener's mapping of the supercontinent Pangaea, the US Navy's discovery of paleomagnetic reversals, and evidence of sea floor spreading. What is the MOST recent evidence supporting plate tectonics? A) GPS monitoring and satellite imagery of crustal movements B) mapping earthquake epicenters with seismic technology C) sending probes deep into Earth's interior D) radioactive dating of fossil evidence

Answer 1

A) GPS monitoring and satellite imagery of crustal movements

Explanation:

The most recent evidence supporting the theory of plate tectonics is the use of  GPS monitoring and satellite imagery of crustal movements.

GPS denotes Global Positioning Systems.

Satellite imagery is a recent advancement in the study of moving plates.

• The global positioning system uses the position of a system of satellites in space to delineate positions on earth.
• It works on the principles of triangulation and this helps to fix positions of objects on the earth surface.
• With this, the change in position of the plates can be recorded by known fixed positions of objects.
• Satellite imagery helps to map changes in terrain with time.
• Images can be correlated through time and the shift in terrains delineated.

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