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The Quran and Mountains: Difference between revisions
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{{Quote|1=[http://www.tafsir.com/default.asp?sid=21&tid=32959 In everything there is a Sign of Him, showing that He is One]<BR>Tafsir Ibn Kathir|2=(And We have placed on the earth firm mountains,) means, mountains which stabilize the earth and keep it steady and lend it weight, lest it should shake with the people, i.e., move and tremble so that they would not be able to stand firm on it -- because it is covered with water, apart from one-quarter of its surface.}}A final point critics have made in this vein is that if it is the case that the phenomenon described as ''tameeda'' occurs on geological timescales imperceptible to humans, then it is difficult to see how mountains, which repeatedly form and disappear on geological timescales, could be responsible for the sustained stabilization of the planet's surface (the Earth having existed for some 4.5 billion years). Moreover, they close, if some such phenomenon was taking place on a geological timescale unbeknownst to humans, why would the Quran mention this? Surely, God would not intentionally speak of things that are incomprehensible to humans, as that would be absurd. At the very least, if the phenomenon described exists but is unknowable, and the Quran is not here making a simple scientific error in its assertions, then what these verses contain cannot be verified as a scientific miracle, for humans, in this case, have no way of verifying what the verses speak of. | {{Quote|1=[http://www.tafsir.com/default.asp?sid=21&tid=32959 In everything there is a Sign of Him, showing that He is One]<BR>Tafsir Ibn Kathir|2=(And We have placed on the earth firm mountains,) means, mountains which stabilize the earth and keep it steady and lend it weight, lest it should shake with the people, i.e., move and tremble so that they would not be able to stand firm on it -- because it is covered with water, apart from one-quarter of its surface.}}A final point critics have made in this vein is that if it is the case that the phenomenon described as ''tameeda'' occurs on geological timescales imperceptible to humans, then it is difficult to see how mountains, which repeatedly form and disappear on geological timescales, could be responsible for the sustained stabilization of the planet's surface (the Earth having existed for some 4.5 billion years). Moreover, they close, if some such phenomenon was taking place on a geological timescale unbeknownst to humans, why would the Quran mention this? Surely, God would not intentionally speak of things that are incomprehensible to humans, as that would be absurd. At the very least, if the phenomenon described exists but is unknowable, and the Quran is not here making a simple scientific error in its assertions, then what these verses contain cannot be verified as a scientific miracle, for humans, in this case, have no way of verifying what the verses speak of. | ||
===Mountains | ===Mountains and stabilization of the Earth about its axis=== | ||
Some advocates of the miracles argue that while mountains do not directly stabilize the Earth's surface by functioning as pegs, their presence and the concomitant fact of the crust being thicker at certain locations due to isostasy results in an increased moment of inertia for the earth, thus reducing its rotational speed and axial tilt. Critics respond to this argument by pointing out that the relative impact of the denser crust at the locations of some mountains is infinitesimally small simply because the crust, even where it is thicker, weighs astronomically less than the Earth as a whole, which weighs 5.97*10<sup>24</sup> kgs, such that it has no significant impact on the Earth's rotational speed or axial tilt. While scientists have acknowledged the extremely minimal impact of the mountainous crust in these respects, they have also pointed out that the Earth's rotational speed and axial tilt are more impacted by small factors such as the Earth's distance from the moon and even by the ancient effect of the post-glacial rebound since the ice ages than they are by the mountains. | |||
===Mountains | Critics also argue here that it is nearly impossible to correlate this stabilization effect, how minimally real it may be, with any remotely plausible interpretation of the relevant verses. | ||
===Mountains and the absorption of seismic earthquake waves=== | |||
{{Quote|{{cite web|url=http://bssa.geoscienceworld.org/content/97/6/2066.abstract |title=Effects of Large-Scale Surface Topography on Ground Motions, as Demonstrated by a Study of the San Gabriel Mountains, Los Angeles, California |publisher= |author= |date= |archiveurl= |deadurl=no}}|We investigate the effects of large-scale surface topography on ground motions generated by nearby faulting. We show a specific example studying the effect of the San Gabriel Mountains, which are bounded by the Mojave segment of the San Andreas fault on the north and by the Los Angeles Basin on the south. By simulating a Mw 7.5 earthquake on the Mojave segment of the San Andreas fault, we show that the San Gabriel Mountains act as a natural seismic insulator for metropolitan Los Angeles. The topography of the mountains scatters the surface waves generated by the rupture on the San Andreas fault, leading to less-efficient excitation of basin-edge generated waves and natural resonances within the Los Angeles Basin. The effect of the mountains reduces the peak amplitude of ground velocity for some regions in the basin by as much as 50% in the frequency band up to 0.5 Hz. These results suggest that, depending on the relative location of faulting and the nearby large-scale topography, the topography can shield some areas from ground shaking.}} | {{Quote|{{cite web|url=http://bssa.geoscienceworld.org/content/97/6/2066.abstract |title=Effects of Large-Scale Surface Topography on Ground Motions, as Demonstrated by a Study of the San Gabriel Mountains, Los Angeles, California |publisher= |author= |date= |archiveurl= |deadurl=no}}|We investigate the effects of large-scale surface topography on ground motions generated by nearby faulting. We show a specific example studying the effect of the San Gabriel Mountains, which are bounded by the Mojave segment of the San Andreas fault on the north and by the Los Angeles Basin on the south. By simulating a Mw 7.5 earthquake on the Mojave segment of the San Andreas fault, we show that the San Gabriel Mountains act as a natural seismic insulator for metropolitan Los Angeles. The topography of the mountains scatters the surface waves generated by the rupture on the San Andreas fault, leading to less-efficient excitation of basin-edge generated waves and natural resonances within the Los Angeles Basin. The effect of the mountains reduces the peak amplitude of ground velocity for some regions in the basin by as much as 50% in the frequency band up to 0.5 Hz. These results suggest that, depending on the relative location of faulting and the nearby large-scale topography, the topography can shield some areas from ground shaking.}} | ||