The Forever Moving Land
The Forever Moving Land
The land below us is always in motion. Plate tectonics studies these
restless effects to give us a better understanding of the Earth and its past.
New molten rocks are poured out in the form of magma from the mid-ocean ridges.
The rock is recycled and re-entered back into the earth in deep ocean trenches
through convection current. The convection current in the mantle drives plates
around either against or away from each other. These collisions give rise to
earthquakes, volcanoes, mountains, and continental drift. The crashing and
spreading of the plates forms the landscape of the Earth as we see it today.
The positions of the land masses today is a result of continental drift. During
the Earth's existence
, the magnetic fields have never been stable. Solidified
magma containing magnetic imprints reveal periods of time when the Earth's
magnetic fields have actually been reversed.
Approximately 4.55 billion years ago, the Earth was just a ball of......
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