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No best answer has yet been selected by brian j john. Once a best answer has been selected, it will be shown here.
For more on marking an answer as the "Best Answer", please visit our FAQ.I don't think the moon was responsible for shovelling the continental masses up, I thought that was because they were lighter and therefore floated on top of the mainly bassaltic ocean shelfs - Mind you geology was never my strong suit.
Some of the current thinking around the initial creation and evolution of life does involve periodic tidal changes so it is quite likely that without a large close moon there would be no life here at all.
Gef, it's my understanding that the earth's molten iron core came about as a result of events leading to the creation of the moon. Best theory so far:
-Earth had not molten iron core
-Planet like object with molten iron core struck earth head on
-That planet broke into bits, leaving molten iron core 'in' earth
-Remaining bits of that other planet coalesced to form our moon (which has little iron as a result).
during 4.6 billion years the land masses have been produced by volcanic activity spewing out matter . Tectonics recycles that matter. When various plates move, subduction takes place, a load of matter on one plate goes under another, it gets broken down in the bowels of the planet and eventually after millions/billions of years comes back out again via volcanic activity (lava flows and explosive ejection) of one sort or another. The earth is and has always been in a state of dynamic flux. Its one giant recycling machine. the moon since its creation will have played its part in this recycling by virtue of its gravitational effect having an effect on the plates movements Assuming we dont blow the planet up ,and given enough time, the very ground you are standing on will at some point go through these process a good few times until our own sun starts to expand in its death throes and destroys the planet.