A basic law of geochronology, stating that in any undisturbed sequence of rocks deposited in layers, youngest layer on top of older layer
Hope that helped
Tectonic plates are parts (pieces) of the outermost layer of Earth: the Crust. (the outermost part of the mantle is also often included in the plates). This means that the land in the middle of the plates is relatively stable while the borders of the plates can be in movement - after all this is where two pieces meet. Plate borders are where the vocanoes and Earthquakes often take place.
I'm pretty sure that it is oil because that is what most of the countries over there use it, making it a trend.
