Have you seen the car-wheel balance: how does the worker do it?
He will put the wheel of the car on a certain rotator, and then will notice where the awkwardness of movement is, and will put the lead weights in a way to balance it and make the movement of the wheel more regular.
Here, the wheel resembles the earth, and the lead weights resemble the mountains.
Certainly, the falling of those mountains on the Earth was a tremendous thing in the past: it must have had some special circumstances like:
• The speed of both the earth and the falling pieces.
• The direction of movement of either of the earth and such falling pieces. If both are moving in the same direction or nearly similar direction or were they moving in opposite directions: the severity of the impact will differ greatly.
• The angle of the impact of such mountains. It should have been heavy but not necessarily very severe.
• The crust of the earth:
>> its elasticity or hardness: will it yield to some extent or is it rigid so that it will shutter.
>> its degree of heat: was it flaming and very hot or was it cold and very rigid.
>> was it thin or thick.
To imagine this process that happened in the past in the early stages of the earth formation: we may liken it to somebody receiving some beats from a boxer:
Whenever the boxer hits him, he will push his face to some extent: and by that exposing the other parts of the face to more blows and beats Smile In this way the mountains might have fallen and this made the movement of the earth more regular.
If we have some patience, we may see this in the Quran 13: 4 about the mountains: how they fell:
وَفِي الأَرْضِ قِطَعٌ مُّتَجَاوِرَاتٌ وَجَنَّاتٌ مِّنْ أَعْنَابٍ
The explanation: (There are, in the earth, pieces adjacent to each other, and gardens of vines )
More explanation:
>> (There are, in the earth, pieces) means: they are not from the earth;
>> (adjacent to each other) means: they neighbored each other in the form of mountainous ranges after being dispersed in the space. Those pieces were the meteorites because they came to the earth from the space.
http://universeandquran.t35.com/new_....htm#Mountains
eanassir
http://universeandquran.t35.com