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{{Quote|{{cite web| url=https://www.islam-guide.com/ch1-1-e.htm | title=From A Brief Illustrated Guide to Understanding Islam. E) The Quran on Seas and Rivers. islam-guide.com.}}|Modern science has discovered that in estuaries, where fresh (sweet) and salt water meet, the situation is somewhat different from what is found in places where two seas meet. It has been discovered that what distinguishes fresh water from salt water in estuaries is a pycnocline zone with a marked density discontinuity separating the two layers. This partition (zone of separation) has a different salinity from the fresh water and from the salt water. (see Figure 4) | {{Quote|{{cite web| url=https://www.islam-guide.com/ch1-1-e.htm | title=From A Brief Illustrated Guide to Understanding Islam. E) The Quran on Seas and Rivers. islam-guide.com.}}|Modern science has discovered that in estuaries, where fresh (sweet) and salt water meet, the situation is somewhat different from what is found in places where two seas meet. It has been discovered that what distinguishes fresh water from salt water in estuaries is a pycnocline zone with a marked density discontinuity separating the two layers. This partition (zone of separation) has a different salinity from the fresh water and from the salt water. (see Figure 4) | ||
[ | [[File:Ocean_Diagram.jpg|thumb|The Atlantic and the Mediterranean]] | ||
<b>Figure 4: Longitudinal section showing salinity (parts per thousand ‰) in an estuary. We can see here the partition | <b>Figure 4: Longitudinal section showing salinity (parts per thousand ‰) in an estuary. We can see here the partition |