A teaspoon of good farm soil contains up to 1 billion bacteria in more than 4000 species. Soil is the skin of the earth. Soils are alive they are born, they age, they breathe. Good luck!
What are the choices you have to choose from?
Slab pull is the cool dense crust sinking into the earth in subduction zones, this literally pulls the entire plate down with it. Ridge push is the lifting and pushing apart of the plates at spreading zones.
The Pacific ocean floor moves much quicker than the Atlantic because it has both slab-pull and ridge push acting on it, while the Atlantic only had ridge push (probably the weaker of the two forces)
