It seems that you're mis-interpreting it spidergoat.
When smoke cooled and coalesced to form our planet, it was initially a molten globe. As it cooled further crests of solid formed and grew just as cream does atop milk on cooling. Steam condensed and formed ocean around it. The single gigantic super continent cracked, broke up and went adrift and thus formed the present continents (Fig.1). They even collided with each other and thus Lemuria Continent was drowned as did other continents partially. The movements of ‘tectonic plates’ gave rise to geological ‘faults’ and mountain ranges. Mountains were also formed through certain other processes like volcanic action.
The super-earthquakes that arose out of tectonic movements decreased drastically in terms of frequency and severity. Thus the crust was stabilized so as to allow life to appear and thrive. Further divisions and collisions of continents practically stopped. So says modern geology. What does Qur’an say?
“Have We not made the earth an expanse, and the high hills bulwarks?” [Naba : 6,7; see also Nahl : 15, Luqman : 10]
“And We have placed in the earth firm hills lest it should quake with them (i.e. ‘every living thing’)...” [Anbiya : 31]
But it can hardly be said that the geological plates are locked fast in place. Though lessened a great deal the remnant minimal swaying and rocking of landmasses still persist, but gently by geological scale. So God mentions:
“..(God is the One) Who has made for you the earth like a cradle...” [Ta Ha : 53]
The regions other than mountains are fairly flat and great water courses and grand trunk routes formed on land. Passes and hill routes formed in mountainous regions. These all enable human societies in later ages to seek nature’s bounties, to spread out and to communicate with each other. Claims Qur’an :
“And Allah hath made the earth a wide expanse for ye that ye may thread the valleyways thereof.” [Noah : 19. 20 Also see Nahl : 15, Ta Ha : 53]
The mountains were not only stabilizers of earth but also produce wealth. Before forests formed on level ground mountains were the precipitators of good water as rain.
“He placed therein firm hills rising above it and blessed it and measured therein its sustenance....” [Ha Meem Sajdah:10]
“And after that He spread the earth. And produced there from the water thereof and the pasture thereof. And He made fast the hills.” [Naziat:30-33. Also seehariat:48, Ghashia: 19,20]